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. 2025 Sep 8;20(9):e0332069. doi: 10.1371/journal.pone.0332069

Healthcare providers’ knowledge on sickle cell disease and its management: A pre- and post-training test evaluation outcome

Vivian Paintsil 1,2,*, Evans Xorse Amuzu 2, Eunice Ahmed 3, Yaa Gyamfua Oppong-Mensah 2, Lesley Osei 4, Bernice Eklu 2, Suraj Yawnumah Abubakar 2, Lawrence Osei-Tutu 2, Daniel Ansong 1,2, Alex Osei-Akoto 1,2, Fred Stephen Sarfo 5,6
Editor: Santosh L Saraf7
PMCID: PMC12416636  PMID: 40920791

Abstract

In resource-limited settings in Africa, which harbour the greatest burden of Sickle Cell Disease (SCD) globally, poor care outcomes are driven in part, by a lack of trained healthcare providers (HCP) and an absence of context-specific treatment guidelines appropriate to the level of healthcare facility. The study aimed to evaluate the impact of a structured training program on HCP’s knowledge of SCD in Ghana. This was prospective cross-sectional study involving HCPs from 46 health facilities from 4 out of 16 regions in Ghana. A curriculum and standard slides were developed by SCD experts based on the Sickle Pan African Research Consortium (SPARCO)Standards of care for Sickle Cell Disease in sub-Saharan Africa clinical recommendations. A full-day workshop highlighting the general overview of SCD, diagnosis, health maintenance, acute and chronic complications was then organized. A pre-training test and a post-training test immediately after the workshop were administered and analyzed. A total of 543 HCPs were trained, mostly from primary level facilities (77.7%). The average number of years working with SCD patients was 5 years (Range: < 1–20 years). Most (93%) HCPs had experience with SCD patients but only 43% reported using a form of guideline for the care of SCD patients. The average score in the pre-training test was 8.4/20 (SD:3.3) increasing to 13.1/20(SD:3.6) in the post-training test, (p-value <0.01). The average proportion of persons indicating a correct answer for a question was 50% at the pre-training test increasing to approximately 69% in the post-test, (p-value <0.01). The knowledge of HCPs about SCD and its management was generally low but improved significantly after the standardized training. Further studies are required to assess the impact of HCP training on health outcomes of SCD in resource limited settings.

Introduction

Sickle cell disease (SCD) is the commonest clinically significant haemoglobinopathy worldwide [1] and considered a public health problem [2]. It predominantly affects blacks and its clinical manifestations starts in the first year of life. In Ghana, about 1.8% of our newborn population have SCD with predominantly SCD-SS and SCD-SC genotypes [3]. Patients with SCD can develop both acute and chronic complications if they are not given any comprehensive treatment [4]. Grosse et al estimated that about 50–90% of patients under 5 years of age with SCD will die if no treatment is initiated [5]. To prevent patients from developing these complications, they are enrolled into dedicated SCD clinics to benefit from heath maintenance interventions. This includes the provision of evidence-based interventions namely penicillin prophylaxis, folic acid supplementation, hydroxyurea for patients, psychosocial support, required vaccinations and regular screening for organ damage including eye, brain, kidney and the heart [6]. Aside routine visits, patients with SCD can present with various complications that needs to be managed adequately by healthcare workers. The commonest amongst these are Vaso-Occlusive pain episodes (VOPE) which present with severe pain that if not adequately managed can lead to chronic pain. Other complications like Acute Chest syndrome (ACS) can also occur during an episode of VOPE and can lead to death [4]. Other common complications that can occur include stroke which causes disability for the patients and requires rehabilitation by the healthcare workers.

The management of SCD requires a multidisciplinary approach that requires physicians and surgeons with various subspecialties, nurses and other allied healthcare professionals [6]. Their input in the management of a patient with SCD is critical for increased survival of the patient. This requires that healthcare professionals are well vexed in the management of SCD wherever they find themselves.

The World Health Organization (WHO) has recommended that management for SCD should be incorporated into primary healthcare, hence all healthcare workers should be able to have adequate knowledge and skills which pertains to diagnosing, and managing SCD patients [6]. Insufficient knowledge will undoubtedly lead to misdiagnosis, increasing morbidity and mortality in this population. To make sure that SCD patients everywhere are treated the same way, there is the provision of standard of care guidelines which is utilized by the healthcare workers. Previous evaluation of knowledge in other studies showed a suboptimal level of knowledge. In Nigeria, only 37.9% of primary healthcare workers had good knowledge about SCD [7] while in DRC, 44% followed any guideline or recommendations for the management of VOC and pain management [8]. In Tanzania, only 25.1% had good knowledge about SCD [9].

The Sickle Pan African Research Consortium (SPARCO) has developed and published recommendations for the management of SCD which is available for use in Sub-Saharan Africa [10]. Ghana is one of the SPARCO sites and the Komfo Anokye Teaching Hospital, a tertiary hospital with a dedicated SCD clinic, where these guidelines form the standard of care for the management of patients. However, to facilitate the diffusion of knowledge, skill and competencies in SCD management to HCP working in lower cadres of healthcare delivery, we undertook a study to assess the knowledge of healthcare workers in 4 regions about SCD management and the impact of the structured training program on their knowledge.

Methods

Study design

This was a prospective cross-sectional study carried out between August 2023 – May 2024 in 4 regions of Ghana. Facilitators were paediatric and adult haematologists at the Komfo Anokye Teaching hospital who run the Kumasi Centre for Sickle Cell Disease. The curriculum and standard PowerPoint slides were drawn from the SPARCO Standards of Care Guidelines [10]. The training was a whole day’s workshop that dealt with overview and pathophysiology of SCD, health maintenance for SCD, Acute complications (VOPE, ACS, Stroke, Anaemia) and Chronic complications (Retinopathy, leg ulcers, nephropathy) and slides found as S4 appendix. Discussion forums were further used to build on the knowledge acquired by the HCWs.

To recruit participants, we initially looked out for facilities that had SCD clinics running, then subsequently invited facilities who referred patients with SCD to our facility and other bigger facilities whom we expected to refer patients but that was not occurring were also targeted. An invitation was purposively sent to the management of these facilities, and they were requested to nominate persons who attend to SCD patients (doctors, nurses, physician assistants, biomedical scientists) to attend the workshops.

After registration, participants were requested to answer a questionnaire. This questionnaire comprised two sections: (1) sociodemographic data: sex, education, city of residence, and professional category, type of health service and the number of years working in healthcare services; and (2) a 20-question knowledge test. The 20-question knowledge test was drawn from the SPARCO Standards of Care Guidelines [10] by the facilitators, ensuring that it covered everything that would be covered during the workshop and found as S1 Appendix. The questions were also reviewed by other experts in SCD for their relevance, clarity and comprehensiveness of the questions. The questions were subsequently pretested to ensure it would test the knowledge appropriately, covered the learning objectives and were clear and understandable. The study team incorporated the necessary modifications into the questions before finalizing it. These same questions were used for both pre-test and post-test. Participants were asked to use their initials so we could map the initial and post-test to ascertain the degree of increase in learning.

Inclusion and exclusion criteria

All Healthcare workers who attended the workshop were eligible to be part. No one was excluded.

Ethical considerations

This study was performed under the SPARCO project with approval by the KNUST Committee for Human Research and Publication Ethics with approval references CHRPE/AP/088/23 and CHRPE/AP/273/24.

Data collection

Participants completed a pre-test before the training and completed a post-test immediately after the training.

Knowledge of participants was assessed using a set of 20 questions which covered SCD diagnosis, management, risk screening, complications and cure.

Data analysis

Data was analysed using STATA 17.0. categorical variables are presented as frequencies and percentages while numeric variables are presented as the mean and the standard deviation or the median and inter quartile range depending on the normality of its distribution.

Test questions were assigned a score of 1 for a correct answer and 0 for a wrong answer. The overall score was further categorized into three levels of knowledge as elucidated by Alzahrani et al using the Bloom’s cut-off point [11]. Scores 16–20(80–100%) were labelled as high level of knowledge, 12–15(60–79%), moderate knowledge, while scores <12 are labelled as having a low knowledge of SCD.

Pairwise correlation was used to find the strength and direction of association the participants’ age, years of working and years of experience with SCD with the pre-test score. A linear regression model was then used to model the significant associations.

The effect of the training was derived from a subset of the data with matched pre- and post- test scores. A two-sample paired student t-test with equal variances was used to test the difference in the scores pre and post the training change.

Results

In all, a total of 543 healthcare workers participated in the training session and completed either the pre-training test, and/or the post-training test. Out of this number 376 participated in the pre-training test and provided their demographic information. Approximately 69% of the trainees completed at least the post-training test. Approximately 39% (210/543) of these participants participated in both the pre -training and the post- training tests as shown in Fig 1.

Fig 1. Flow diagram of participants recruitment.

Fig 1

Most of participants were from the primary health care facilities and majority of those who completed the post-test (81.9%) were from this category. Nurses formed the majority (50% vs 53%) of those who participated in both the pre-test and post-test respectively. Majority (61.4%) of participants were not using any guidelines for managing SCD as seen in Table 1.

Table 1. Demographic characteristics of participants.

Pre-test n = 376 Post-test n = 210
Variable Frequency, n (%) Frequency, n (%)
Facility Level
Primary 292(77.7) 172(81.9)
Secondary 22(5.9) 14(6.7)
Tertiary 62(16.5) 24(11.4)
Sex
Female 232(61.7) 125(59.5)
Male 144(38.3) 85(40.5)
Age Mean (SD) 33.5(5.9) 33.0(5.6)
Occupation
Doctors 92(24.5) 41(19.5)
Nurses 188(50.0) 112(53.3)
Others 96(25.5) 57(27.1)
Work experience(years) Mean (SD) 7.1(5.4) 7.0(5.1)
Experience with SCD
No 23(6.4) 14(6.9)
Yes 339(93.7) 188(93.1)
SCD Working experience (Years) Mean (SD) 4.8(4.4) 4.6(4.1)
Use of SCD guidelines
No 231(61.4) 115(59.6)
Yes 145(38.6) 78(40.41)

Facility level and occupation were found to be statistically significant predictors of knowledge level at pre-training. Compared to persons working in primary health facilities, persons working in secondary level facilities on average had 1.4 points higher knowledge scores in their pre-training test scores. Compared to doctors, nurses had 4 points lower knowledge scores in their pre-training scores. (Table 2)

Table 2. Linear regression table of factors predictive of knowledge at pretest.

Variable Crude (95% CI) p-value Adjusted (95% CI) p-value
Age 0.02 (−0.03- 0.08) 0.411 0.02(−0.07-0.12) 0.631
Working time 0.01(−0.05- 0.08) 0.675 0.02(−0.01-0.14) 0.741
Working with SCD 0.09(0.01- 0.17) 0.027 0.02(−0.08-0.12) 0.656
Sex
Female Ref Ref Ref Ref
Male 0.23(−0.46- 0.92) 0.509 −0.05(−0.76-0.65) 0.881
Facility level
Primary Ref Ref Ref Ref
Secondary 1.26 (−0.16 −2.68) 0.081 1.44(0.01-2.78) 0.036
Tertiary 1.24(0.34-2.14) 0.007 0.40(−0.59-1.38) 0.427
Occupation
Doctors Ref Ref Ref Ref
Nurses −4.06(−4.77- −3.35) <0.001 −4.15(−4.98—3.32) <0.001
Others −3.74(−4.55- −2.93) <0.001 −3.52(−4.50- −2.55) <0.001
Experience with SCD
No Ref Ref Ref Ref
Yes 1.18(0.06- 2.30) 0.038 −0.18(−1.73- 1.37) 0.816

Impact of training

Questions on the unrecognized presentation of SCD, common retinopathy genotype, penicillin v substitute in the event of penicillin allergy, infant diagnosis method, and medication not required in steady state had over 30% more correct answers in the post-training test than in the pre-training test. The average score was higher in the post-training test 13.1(SD 3.6) than in the pretest 8.5(SD 3.3). (Table 3)

Table 3. Pre and post test questions – Impact of training.

Pre-training Correct answer distribution (n) Frequency (%) Post-training Correct Answer distribution Frequency (%) Diff
Not recognized clinical presentation(n = 361) 124(34.35) Not recognized clinical presentation p(n = 365) 278(76.16) 41.81
Non-SCD complication(n = 365) 143(39.18) Non SCD complication p(n = 371) 195(52.56) 13.38
Genotype for SCD retinopathy (n = 360) 88(24.44) Genotype for SCD retinopathy p(n = 370) 235(63.51) 39.07
Post splenectomy vaccines (n = 343) 125(36.44) Post splenectomy vaccines p(n = 368) 195(52.99) 16.55
Hydroxyurea in anemia management(n = 368) 169(45.92) Hydroxyurea in anemia management p(n = 369) 202(54.74) 8.82
Aplastic crisis complication (n = 357) 226(63.31) Aplastic crisis complication p(n = 360) 247(68.61) 5.3
Penicillin V substitute (n = 350) 138(39.43) Penicillin V substitute p(n = 370) 302(81.62) 42.19
SCD diagnostic tests(n = 365) 63(17.26) SCD diagnostic tests p(n = 370) 142(38.38) 21.12
Infant diagnosis(n = 364) 104(28.57) Infant diagnosis p(n = 369) 251(68.02) 39.45
Least useful test for Sβthal(n = 366) 129(35.25) Least useful test for Sβthal p(n = 365) 203(55.62) 20.37
Not required steady state(n = 368) 222(60.33) Not required steady state p(n = 369) 348(94.31) 33.98
Mental health and psychosocial support (n = 371) 17(4.58) Mental health and psychosocial support p(n = 369) 15(4.07) −0.51
Non-pharma prevention of crises(n = 368) 286(77.72) Non-pharma prevention of crises p(n = 370) 324(87.57) 9.85
Not primary ACS management(n = 361) 151(41.83) Not primary ACS management p(n = 368) 249(67.66) 25.83
SCD potential for cure (n = 364) 289(79.4) SCD potential for cure p(n = 368) 324(88.04) 8.64
Hydroxyurea (HU) role in management (n = 361) 109(30.19) Hydroxyurea role in management p(n = 370) 162(43.78) 13.59
Possible ACS presentation in SCD (n = 361) 215(59.56) Possible ACS presentation in SCD p(n = 368) 260(70.65) 11.09
Sickle Cell Anaemia definition(n = 341) 246(72.14) Sickle Cell Anaemia definition p(n = 367) 274(74.66) 2.52
Stroke screening methods(n = 350) 234(66.86) Stroke screening methods p(n = 370) 287(77.57) 10.71
Key principle in SCD management(n = 359) 238(66.3) Key principle in SCD management p(n = 366) 236(64.48) −1.82
Score n = 375 mean(sd) 8.47(3.3) Score n = 372 mean(sd) 13.07(3.61) 4.6

Table 4 showed that there was a 4.6-point increase in the mean scores at pre-training compared pretest to post-training scores test of participants. This difference was found to be statistically significant.

Table 4. Paired t test comparison of pretest and post-test scores by occupations.

All occupations (n = 210) mean(95%CI) t p-value
Post test score 12.9(12.3--13.4) 21.22 <0.0001
Pre-test score 8.2(7.8--8.7)
Diff 4.6(4.2--5.1)
Doctors (n = 41)
Post test score 16.5(15.6--17.3) 14.1 <0.0001
Pre-test score 11.5(10.7--12.3)
Diff 5(4.3--5.7)
Nurses (n = 112)
Post test score 11.7(11.1--12.3) 13.4 <0.0001
Pre-test score 7.4(6.9--7.9)
Diff 4.3(3.7--5)
Others (n = 57)
Post test score 12.6(11.5--13.7) 11.7 <0.0001
Pre-test score 7.6(6.7--8.5)
Diff 5(4.1--5.8)

Mean pretest scores and post test scores were lowest in participants from primary level facilities as seen in Fig 2. The minimum post-test score of participants emanating from secondary and tertiary facilities were at least equal to the median pretest score.

Fig 2. Boxplot comparing pretest and post-test scores in different referral level facilities.

Fig 2

In Table 5, there was a significantly improved knowledge levels especially among doctors with a shift to the high post-test score. Nurses and other professionals showed a statistically significant but more modest improvement in knowledge.

Table 5. Association of pre-and post- test scores by occupations.

Doctors Post test knowledge level
Pre-test knowledge level Low Moderate High Total x2
Low 2(100) 7(100) 12(37.5) 21(51.22) 0.005
Moderate 0(0) 0(0) 19(59.38) 19(46.34)
High 0(0) 0(0) 1(3.13) 1(2.44)
Total 2(4.88) 7(17.07) 32(78.05) 41(100)
Nurses
Low 50(98.04) 44(97.78) 13(81.25) 107(95.54) 0.029
Moderate 1(1.96) 1(2.22) 3(18.75) 5(4.46)
Total 51(45.54) 45(40.18) 16(14.29) 112(100)
Others
Low 24(100) 14(87.5) 13(76.47) 51(89.47) 0.031
Moderate 0(0) 2(12.5) 4(23.53) 6(10.53)
Total 24(42.11) 16(28.07) 17(29.82) 57(100)
All professions
Low 76(98.7) 65(95.6) 38(8.5) 179(85.2) <0.001
Moderate 1(1.3) 3(4.41) 26(40.0) 30(14.29)
High 0(0.0) 0(0.0) 1(1.54) 1(0.48)
Total 77(36.7) 68(32.4) 65(30.9) 210(100.0)

The proportion of participants failing the test reduced from 65% at pre-training to 21% post-training. This change was found to be statistically significant. Over 50% of those who failed in the pre-training test, passed the post-training test.

Discussion

Sociodemographic characteristics of participants

The patient recruitment flow diagram in Fig 1 shows a clear overview of the selection and completion of the pre-test and post-test. About 70% took part in the pre-test whiles only 55.8% took part in the post-test. This attrition could be an indication of the fear for assessments by HCP and may affect the generalizability of the result. The study involved a diverse group of HCPs involved in the care of SCD patients, including doctors, nurses, biomedical laboratory scientists and pharmacists as seen in Table 1. Participants were largely nurses’, and this is not surprising as nurses form the largest proportion of the healthcare workforce in Ghana. Our finding of more females than males contradicts findings in a study in Democratic Republic of Congo (DRC) where their medical workforce were predominantly males [12]. Our results are comparable to the health workforce of Ghana where around 60% are females [13]. Most participants worked at primary healthcare facilities as seen in Table 2 and this was a purposeful move to involve more Primary Health Care (PHC) centres to benefit from the training. The World Health Organization (WHO) [6] in its strategic framework for SCD has emphasized the need to integrate SCD care into the primary health care system so that no matter where patients find themselves, they would have access to good care.

Baseline knowledge about SCD

The Healthcare Workers showed a low level of knowledge at pre-training (Table 3) which is comparable with other African countries where knowledge assessment in HCWs showed a poor knowledge base [7,9]. This was not the case for a trainer-of-trainer (ToT) workshop where participants had a good baseline knowledge with the lowest score being 13 out of 20 [14]. The best of HCWs is largely chosen for the ToT and so it was likely that they were familiar with SCD and its management. In contrast to what is reported in our study, Diniz et al from the USA showed that over two-thirds of healthcare workers had good knowledge on SCD [15]. For patient centred care and good patient outcome, a good knowledge about SCD is required. Our results indicate a gap that underscores the need for continuous training on SCD.

The questions with the lowest scores were those on psychosocial support and diagnostic tests for SCD. This is worrying as making a diagnosis of SCD is one of the most essential things to do for patient outcome. Only 17.6% of participants knew how to diagnose SCD patients correctly. This is lower as compared to other studies in DRC where about 26.6% and 48.8% of participants had knowledge about the Emmel test and Hb Electrophoresis respectively. The newborn screening (NBS) program for SCD has been ongoing in Ghana since 1995 and it was expected that HCPs have good knowledge about the program but only 28.75% knew about NBS. Newborn screening for SCD is recommended to identify newborns suffering from SCD before the onset of symptoms, to prevent infectious complications and VOC and to reduce the risk of mortality. This requires the institutionalization of continuous training for HCPs especially as WHO has recommended NBS for SCD. Healthcare workers however had good knowledge about complications and management of SCD.

Participants who had worked previously with SCD patients had a significantly higher pre-training test score as compared to those who had not worked with SCD patients (Table 2). This is comparable with a study in Kinshasa where nurses with previous experience with SCD had a better knowledge [12]. This higher pre-training test score could be as a result of attendance in previous workshops on SCD. It could also be because of accumulated field experience on SCD.

Participants from the secondary and tertiary referral level had a significantly higher score at pre-training compared to those from the primary levels as seen in Fig 2. This could indicate disparities in access to prior training or SCD educational resources. Doctors performed significantly better in the pre-test compared to nurses and other allied health professionals with nurses scoring an average of 4 points lower than doctors. It brings to bear the need for a targeted training according to their professional roles.

The study also highlights a significant gap in the uptake of clinical guidelines for the management of SCD with only 38.6% of participants reporting use of guidelines in their clinical practice as seen in Table 1. In spite of the availability of evidence-based recommendations such as the National Heart, Lung, and Blood Institute (NHLBI), SPARCO guidelines and nationally with the standard treatment guidelines, the integration into routine care remains suboptimal. This may impair the health outcomes of patients with SCD. Potential barriers to guideline uptake could be limited awareness and accessibility of the guidelines. Other systemic constraints like inadequate treatment infrastructure and medication stock-out may discourage adherence to these guidelines even when available. This training is thus important for HCP to be aware and use the guidelines for better patient outcome.

Impact of training

Results from this project showed a significant impact of the training in improving the knowledge about SCD among HCWs. The pre and post-test analysis shows an increase in knowledge scores depicted by a mean score improvement of 4.6 points (p < 0.001) shown in Table 3. The questions within the domains related to unrecognized presentation of SCD, commonest phenotype for retinopathy, Pen V substitutes in the event of penicillin allergy and methods for infant diagnosis showed the greatest improvement with >30% increases (Table 3).

Participants from secondary referral level facilities showed significant improvement with an adjusted score of 1.44 points compared to the primary level facilities (Fig 2). Those from primary level facilities consistently had the lowest median pretest and post test scores which indicates the need to provide more sustained training given that the significant proportion of SCD care is delivered at primary level healthcare facilities in low-income settings. The minimum post-test scores for secondary and tertiary facilities equalled or exceeded the median pretest scores which showed a more robust baseline knowledge and better post training performance. Occupational disparities persisted even after training as shown in Tables 4 and 5 which emphasizes the need for the training to be tailored to the specific roles and responsibilities of the different cadres of health workers.

Despite these overall gains, minimal improvement or slight decline was seen in the question about psychosocial support as part of treatment and key principles of management. It was however unclear why HCPs rather got these questions wrong in the post-training test. It could be that the content was not clear during the presentation, or the test questions were confusing and will need to be reviewed again.

Overall, there was a reduction in the proportion of participants who had low knowledge about the test from 65% pre-training to 21% post-training which further highlighted the effectiveness of the training. While we demonstrated an improvement in healthcare worker’s knowledge of SCD following training, it is important to acknowledge that the ultimate measure of impact lies in patient-care outcomes. Improved knowledge should ideally translate into better clinical decision-making, timely interventions and a better quality of care for patients with SCD.

Conclusion

This training significantly improved knowledge about SCD among HCPs with the greatest gains in clinical management. However, disparities in knowledge across facility levels and occupations highlight the need for targeted role-specific training especially for primary level facilities to address the persistent knowledge gaps. There will also be the need to incorporate SCD management in all the curriculum for the health training institutions to improve their baseline knowledge about SCD. It also highlights the need to have SCD management guidelines available for HCPs in the management of patients for a better outcome.

Limitations and future research

The post-test was conducted immediately after the training which does not account for long term retention of the knowledge. There was attrition in the proportions of participants who voluntarily completed pre-test and post-tests out of the total sample of participants who attended the workshops. Participation in the workshop based on nomination from purposively selected facilities which could introduce some selection bias of the participants. Also, the lack of a validated knowledge test could be a potential limitation.

Future studies should include follow-up assessments to evaluate long term knowledge gain and also evaluate whether the training intervention result in measurable improvements in patient care outcomes such as improved adherence to use of guidelines and enhanced patient satisfaction. Also, validating the assessment tool using psychometric properties like internal consistency should be considered for future studies.

Supporting information

S1 Appendix. Test Questionnaire.

(DOCX)

pone.0332069.s001.docx (20.2KB, docx)
S2 Appendix. SPARCO II 2023–2024 Renewal.

(PDF)

pone.0332069.s002.pdf (530KB, pdf)
S3 Appendix. SPARCO II Approval 2024–2025.

(PDF)

pone.0332069.s003.pdf (558.3KB, pdf)
S4 Appendix. SOC Training Slides.

(PDF)

pone.0332069.s004.pdf (8.1MB, pdf)

Acknowledgments

We acknowledge the support of the various heads of health facilities for their collaboration and support in organizing the workshops. We also acknowledge the support of Priscilla Agyeibea Awuku and Tony Boakye in data acquisition and entry.

Data Availability

All relevant data for this study are publicly available from the Zenodo repository (https://doi.org/10.5281/zenodo.16099761).

Funding Statement

Funding was received from Pfizer specialties limited to conduct the trainings.

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  • 14.Tanabe P, Stevenson A, DeCastro L, Drawhorn L, Lanzkron S, Molokie RE, et al. Evaluation of a train-the-trainer workshop on sickle cell disease for ED providers. J Emerg Nurs. 2013;39(6):539–46. doi: 10.1016/j.jen.2011.05.010 [DOI] [PubMed] [Google Scholar]
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Decision Letter 0

Santosh L Saraf

15 May 2025

Dear Dr. Paintsil,

Please submit your revised manuscript by Jun 29 2025 11:59PM. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org . When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file.

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Academic Editor

PLOS ONE

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

Reviewer #1: Yes

Reviewer #2: Yes

**********

2. Has the statistical analysis been performed appropriately and rigorously? -->?>

Reviewer #1: Yes

Reviewer #2: Yes

**********

3. Have the authors made all data underlying the findings in their manuscript fully available??>

The PLOS Data policy

Reviewer #1: No

Reviewer #2: Yes

**********

4. Is the manuscript presented in an intelligible fashion and written in standard English??>

Reviewer #1: Yes

Reviewer #2: Yes

**********

Reviewer #1: This is an interesting article evaluating the impact of a structured training program on healthcare providers’ knowledge of SCD in Ghana. While educating providers about SCD is critical, this pilot study is somewhat limited and has a few significant biases. However, it is a large-scale educational project with some important characteristics. Below are some of the limitations and possible areas to improve the impact of the manuscript.

Major Concerns:

1) Lack of use of a validated instrument for the knowledge test is a significant concern.

a. Several questions are unrelated to sickle cell disease (e.g., #7); it is unclear what the intent is of these questions that may not be directly related to sickle cell knowledge.

b. Numerous acronyms are present that may be confusing and may limit participants’ ability to respond accurately (e.g., #8,10).

c. It would be helpful to include more background about how these questions were made.

d. Was there any validation of these questions? If not, this is a major limitation.

2) There is likely a large knowledge gap between the different occupations, as is noted in the baseline score, and some of the occupations have a more critical role in the treatment of sickle cell disease; therefore, it would be important to know the differences between the occupations for the following:

a. A breakdown of the different occupations’ completion of the pre- and post-test is needed

b. Table 3 would be important to be broken down by occupation.

c. Also, the pre- and post-test differences (Tables 4 and 5) would be interesting if they were analyzed by occupation.

3) Measuring knowledge before and after a single in-person workshop limits the impact of this manuscript. This pilot may not translate to affecting patient care; however, it is a large-scale training, involving many healthcare professionals in Ghana. The manuscript could also mention the importance of measuring patient-care outcomes after this intervention.

4) There is a notable drop-off from those who participated to those who had a pre- and post-test, 55%.

a. This is a very large limitation and should be noted in the limitations section.

b. It would be important to include a supplementary table describing the differences in demographics, profession, and other components between those who gave that information but did not complete the post-test.

Minor concerns:

1) Including the slides of the workshop would be helpful for others who might want to replicate the work.

2) The score cut-off of 10 is arbitrary. Is there any justification that could make this a reasonable cutoff? If not, consider removing this cutoff and the concept of passing and failing from the manuscript.

Reviewer #2: Comprehensive work and well written. i wonder why the cut offs were 0-10 and 11-20. Perhaps having in 3 groups (poor, fair, great) will give a real idea of the difference between pre and post test in various groups.

**********

what does this mean? ). If published, this will include your full peer review and any attached files.

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Reviewer #1: No

Reviewer #2: Yes:  Marwah Farooqui

**********

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Attachment

Submitted filename: PLOS reviewer comments.docx

pone.0332069.s005.docx (15KB, docx)
PLoS One. 2025 Sep 8;20(9):e0332069. doi: 10.1371/journal.pone.0332069.r002

Author response to Decision Letter 1


27 Jul 2025

Dear Reviewers and Editor,

Point-to-point response to reviewers’ comments

We would like to thank the reviewers and editor for their critical revision and valuable comments which had a tremendous effect on improving our manuscript. The points brought up by the reviewers have provided us with very important insights, and we are confident that the changes made have improved the quality of our work. Please find below our point-to-point responses to the reviewer’s comments.

We hope you find the amendments satisfactory. We are happy and ready for any further steps or improvement.

Reviewer Comments on Manuscript PONE-D-25-17578

Comment Response

1) Lack of use of a validated instrument for the knowledge test is a significant concern. The instrument was not statistically validated but first reviewed by experts in the field of SCD and pretested across all cadres involved in SCD care before its use. It was designed to test knowledge about the SPARCo Standards of Care Guidelines for SCD management in sub-Saharan Africa which was the source of the curriculum for the workshop. A description of its development and validation is inserted Line 101-109

a. Several questions are unrelated to sickle cell disease (e.g., #7); it is unclear what the intent is of these questions that may not be directly related to sickle cell knowledge. All questions were related to SCD. E.g. #7 is aimed at knowing if healthcare workers know what medication to use for prophylaxis for infections when a patient with SCD is allergic to regular Penicillin V

b. Numerous acronyms are present that may be confusing and may limit participants’ ability to respond accurately (e.g., #8,10). The acronyms have been written in full.

c. It would be helpful to include more background about how these questions were made. A description of its development and pretesting is inserted Line 101-109

d. Was there any validation of these questions? If not, this is a major limitation. The instrument was not statistically validated but pretested across all cadres involved in SCD care before its use. A description of its development and validation is inserted Line 101-109

2) There is likely a large knowledge gap between the different occupations, as is noted in the baseline score, and some of the occupations have a more critical role in the treatment of sickle cell disease; therefore, it would be important to know the differences between the occupations for the following:

a. A breakdown of the different occupations’ completion of the pre- and post-test is needed A description of the participants completing the post test has been added to table 1

b. Table 3 would be important to be broken down by occupation. The difference between the pre-test and post-test by the different occupations has been done and now seen as Table 4

c. Also, the pre- and post-test differences (Tables 4 and 5) would be interesting if they were analyzed by occupation. Analysis by occupation has been done and included

3) Measuring knowledge before and after a single in-person workshop limits the impact of this manuscript. This pilot may not translate to affecting patient care; however, it is a large-scale training, involving many healthcare professionals in Ghana. The manuscript could also

mention the importance of measuring patient-care outcomes after this intervention.

This will be done in future studies

4) There is a notable drop-off from those who participated to those who had a pre- and post-test, 55%.

a. This is a very large limitation and should be noted in the limitations section. This is well noted and has been added as a limitation.

b. It would be important to include a supplementary table describing the differences in demographics, profession, and other components between those who gave that information but did not complete the post-test. Description of persons completing post test added to table 1

Minor concerns:

1) Including the slides of the workshop would be helpful for others who might want to replicate the work. This is well noted. The slides will be available for anyone upon request

2) The score cut-off of 10 is arbitrary. Is there any justification that could make this a reasonable cutoff? If not, consider removing this cutoff and the concept of passing and failing from the manuscript. Categorization has now been changed to using Bloom’s cut-off points as was used in a similar study by Alzahrani et al.

Reviewer #2: Comprehensive work and well written. i wonder why the cut offs were 0-10 and 11-20. Perhaps having in 3 groups (poor, fair, great) will give a real idea of the difference between pre and post test in various groups. Categorization has now been changed to using Bloom’s cut-off points which talks about high level of knowledge, moderate knowledge and low knowledge as used by Alzahrani et al.

Additional considerations:

1. Lack of Long-Term Follow-Up: The post-training assessment was immediate. A follow-up at 3–6 months would help assess retention and sustained impact. A follow-up study is being planned for the future

2. Validation of Assessment Tool: The manuscript does not clarify whether the pre/post-test questions were piloted or validated. Including psychometric properties (e.g., internal consistency) would strengthen the evaluation. A description of its development and validation is inserted Line 101-109

3. Cutoff for Knowledge Scores: Comprehensive work. That said, I wonder why the cutoffs were 0–9 (poor) and 10–20 (good). A three-tier system (e.g., poor, fair, good) may give a more nuanced view of the distribution and changes across knowledge levels. Categorization has now been changed to using Bloom’s cut-off points. This has been described in line 125-129

4. Selection Bias: Since participation was based on invitations, there may be a bias toward more engaged or motivated providers. This should be briefly acknowledged in the limitations. Acknowledged. Line 282-283

5. Participant feedback: Consider including a brief participant feedback component in future work to guide content refinement. Thanks and this is well noted

6. Barriers to implementation: Expand on the discussion of barriers to guideline uptake, especially since only 43% reported using one. This has been discussed and found in lines 235-244

Thank you

Dr Vivian Paintsil

Decision Letter 1

Santosh L Saraf

16 Aug 2025

Dear Dr. Paintsil,

Please submit your revised manuscript by Sep 30 2025 11:59PM. If you will need more time than this to complete your revisions, please reply to this message or contact the journal office at plosone@plos.org . When you're ready to submit your revision, log on to https://www.editorialmanager.com/pone/ and select the 'Submissions Needing Revision' folder to locate your manuscript file.

  • A rebuttal letter that responds to each point raised by the academic editor and reviewer(s). You should upload this letter as a separate file labeled 'Response to Reviewers'.

  • A marked-up copy of your manuscript that highlights changes made to the original version. You should upload this as a separate file labeled 'Revised Manuscript with Track Changes'.

  • An unmarked version of your revised paper without tracked changes. You should upload this as a separate file labeled 'Manuscript'.

If applicable, we recommend that you deposit your laboratory protocols in protocols.io to enhance the reproducibility of your results. Protocols.io assigns your protocol its own identifier (DOI) so that it can be cited independently in the future. For instructions see: https://journals.plos.org/plosone/s/submission-guidelines#loc-laboratory-protocols . Additionally, PLOS ONE offers an option for publishing peer-reviewed Lab Protocol articles, which describe protocols hosted on protocols.io. Read more information on sharing protocols at https://plos.org/protocols?utm_medium=editorial-email&utm_source=authorletters&utm_campaign=protocols .

We look forward to receiving your revised manuscript.

Kind regards,

Santosh L. Saraf

Academic Editor

PLOS ONE

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[Note: HTML markup is below. Please do not edit.]

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

Reviewer #1: (No Response)

Reviewer #2: All comments have been addressed

**********

2. Is the manuscript technically sound, and do the data support the conclusions??>

Reviewer #1: Yes

Reviewer #2: Yes

**********

3. Has the statistical analysis been performed appropriately and rigorously? -->?>

Reviewer #1: Yes

Reviewer #2: Yes

**********

4. Have the authors made all data underlying the findings in their manuscript fully available??>

The PLOS Data policy

Reviewer #1: No

Reviewer #2: Yes

**********

5. Is the manuscript presented in an intelligible fashion and written in standard English??>

Reviewer #1: Yes

Reviewer #2: Yes

**********

Reviewer #1: The authors have done a good job responding to this reviewers comments. A few more comments/clarifications would help improve the impact of this manuscript:

Adding the slides as a supplemental file would be helpful.

There was no description of the validation of the knowledge test in the submission. For example, how was content validity determined? The lack of a validated knowledge test should be included in the limitations.

Adding that the following would be done in future studies in the manuscript as part of this reviewer’s original comments would be helpful: “. The manuscript could also mention the importance of measuring patient-care outcomes after this intervention”

Reviewer #2: changing to low, moderate, and high in the pre and post scores clarifies my understanding of this. also appreciated the breakdown based on profession

**********

what does this mean? ). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy

Reviewer #1: No

Reviewer #2: No

**********

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While revising your submission, please upload your figure files to the Preflight Analysis and Conversion Engine (PACE) digital diagnostic tool, https://pacev2.apexcovantage.com/ . PACE helps ensure that figures meet PLOS requirements. To use PACE, you must first register as a user. Registration is free. Then, login and navigate to the UPLOAD tab, where you will find detailed instructions on how to use the tool. If you encounter any issues or have any questions when using PACE, please email PLOS at figures@plos.org

PLoS One. 2025 Sep 8;20(9):e0332069. doi: 10.1371/journal.pone.0332069.r004

Author response to Decision Letter 2


21 Aug 2025

Comments and Response

Comments: Adding the slides as a supplemental file would be helpful.

Response: The slides have been added on as supplementary file

Comments: There was no description of the validation of the knowledge test in the submission. For example, how was content validity determined? The lack of a validated knowledge test should be included in the limitations.

Response: This has been added to the limitations and inserted in lines 289-290.

Also, a recommendation has also been inserted in lines 293-295 for validating the knowledge test

Comments: Adding that the following would be done in future studies in the manuscript as part of this reviewer’s original comments would be helpful: “. The manuscript could also mention the importance of measuring patient-care outcomes after this intervention”

Response: A discussion on this has been inserted in lines 272-275. And it has also been added on in lines 291-293 as a recommendation for future studies.

Attachment

Submitted filename: Response to reviewers letter.docx

pone.0332069.s008.docx (109.1KB, docx)

Decision Letter 2

Santosh L Saraf

26 Aug 2025

Healthcare providers’ knowledge on Sickle Cell Disease and its management: A pre- and post-training test evaluation outcome

PONE-D-25-17578R2

Dear Dr. Paintsil,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

An invoice will be generated when your article is formally accepted. Please note, if your institution has a publishing partnership with PLOS and your article meets the relevant criteria, all or part of your publication costs will be covered. Please make sure your user information is up-to-date by logging into Editorial Manager at Editorial Manager®  and clicking the ‘Update My Information' link at the top of the page. For questions related to billing, please contact billing support .

If your institution or institutions have a press office, please notify them about your upcoming paper to help maximize its impact. If they’ll be preparing press materials, please inform our press team as soon as possible -- no later than 48 hours after receiving the formal acceptance. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information, please contact onepress@plos.org.

Kind regards,

Santosh L. Saraf

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Acceptance letter

Santosh L Saraf

PONE-D-25-17578R2

PLOS ONE

Dear Dr. Paintsil,

I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now being handed over to our production team.

At this stage, our production department will prepare your paper for publication. This includes ensuring the following:

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on behalf of

Dr. Santosh L. Saraf

Academic Editor

PLOS ONE

Associated Data

    This section collects any data citations, data availability statements, or supplementary materials included in this article.

    Supplementary Materials

    S1 Appendix. Test Questionnaire.

    (DOCX)

    pone.0332069.s001.docx (20.2KB, docx)
    S2 Appendix. SPARCO II 2023–2024 Renewal.

    (PDF)

    pone.0332069.s002.pdf (530KB, pdf)
    S3 Appendix. SPARCO II Approval 2024–2025.

    (PDF)

    pone.0332069.s003.pdf (558.3KB, pdf)
    S4 Appendix. SOC Training Slides.

    (PDF)

    pone.0332069.s004.pdf (8.1MB, pdf)
    Attachment

    Submitted filename: PLOS reviewer comments.docx

    pone.0332069.s005.docx (15KB, docx)
    Attachment

    Submitted filename: Response to reviewers letter.docx

    pone.0332069.s008.docx (109.1KB, docx)

    Data Availability Statement

    All relevant data for this study are publicly available from the Zenodo repository (https://doi.org/10.5281/zenodo.16099761).


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