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. 2019 Feb 6;139(4):382–388. doi: 10.1111/ane.13067

Work‐related predictors for return to work after stroke

Annie Palstam 1,, Emma Westerlind 1, Hanna C Persson 1, Katharina S Sunnerhagen 1
PMCID: PMC6617971  PMID: 30657175

Abstract

Objectives

Disability due to stroke imposes a large burden on individuals, and on society, in terms of impaired work ability and sick leave. The reported return to work (RTW) rate after stroke varies globally and is influenced by a range of different aspects. The aim of this study was to investigate the influence of work‐related factors on time to RTW after stroke, and possible differences between the sexes.

Materials & Methods

Data from 204 persons with first‐time stroke in the years 2009‐2010 in Gothenburg, Sweden, who were of working age and had worked prior to their stroke, were analysed. Disease‐related characteristics were retrieved from medical records, and work‐related‐ and socio‐economic data were collected up to 6 years post‐stroke from Statistics Sweden and the Swedish Social Insurance Agency. Cox regression was used to analyse predictors for time to RTW.

Results

We identified qualified occupation and large organizational size as work‐related predictors for shorter time to RTW after stroke. Being male predicted a faster and higher frequency of RTW. Qualified occupation predicted shorter time to RTW in men but not in women. For women, the only predictor for RTW was physical dependency at discharge.

Conclusion

Type of work and organizational size are work‐related factors of importance for RTW after stroke. Work‐related factors were important for RTW in men, but not in women. Reasons for differences between men and women in work‐related factors that influence RTW need to be further investigated to better understand how to support women in the RTW process.

1. INTRODUCTION

Disability due to non‐communicable diseases, including stroke, imposes a large burden on individuals as well as on society in terms of work disability and sick leave.1, 2 In Sweden, 25‐30 000 people suffer a stroke each year, of whom 20% are of working age, an age group in which stroke has become more common in recent years.3 As of today, most persons will survive their initial illness, and thus, the health consequences for persons with stroke and their families largely concern various long‐term physical, cognitive and emotional disabilities. Stroke is the leading cause of long‐term disability in the adult population, with consequences that lead to activity limitations and reduced participation in society, such as prolonged sick leave.4

Return to work (RTW) is commonly referred to as the event when resuming work after a period of sick leave. The reported RTW rate has a very large range globally,5, 6, 7, 8, 9, 10 possibly relating to differences in the social benefit systems and sociocultural aspects in different countries as well as in varying definitions of work. Milder stroke severity and good self‐rated health have been reported to be predictors for RTW.6 Predictors for no RTW have been reported to be physical dependency at discharge, higher degree of residual disability,11 sick leave prior to stroke,9 unemployment prior to stroke,12 low socio‐economic status,8 being an immigrant,12 comorbidities,12 older age7 and being female.5 The odds for RTW have been found to increase in concert with the occupational qualification level, where professionals have the highest odds for RTW compared to workers in elementary occupations and occupations requiring basic skills.5 Also, employees working in larger organizations have better odds for RTW than those working in smaller organizations.13

In Sweden, sickness benefits are paid by the Swedish Social Insurance Agency, except for the first two weeks of sick leave where the employer provides sick pay. Sickness benefits are approved when a disease is deemed to impair a persons’ ability to work by at least 25% and gradually up to 100%. Decisions on sickness benefits are based on assessments of work ability using criteria that are more stringent when absence from work is prolonged. For persons where no RTW is anticipated due to disease, early retirement in terms of sickness compensation is an alternative arrangement. The employer responsibilities concerning the RTW process of employees’ are most explicit in Sweden, although shared with health care, the Social Insurance Office (SIO) and the Employment Agency (EA). Employers are obliged to adapt work tasks, working hours, start work trials, and make technical adjustments, though they are not forced to expand or create new work tasks.

In addition to being a source of income, work also provides a social context and forms an important part of a person's identity.14 The drive to reclaim one's life and return to meaningful activities after stroke has been emphasized as a motivational factor for persons with stroke in their RTW process.15 RTW has been found to be beneficial for health and well‐being after stroke16, 17 and also to be of importance for overall life satisfaction, especially in men, who had a 2.5 times higher risk of being unsatisfied with life if they did not RTW after stroke.18 Partially due to the expenses of providing sick leave and disability benefits, stroke constitutes a major socio‐economic burden, when considering that it has a relatively high incidence and often results in long‐term disabilities and impacts negatively on long‐term participation.19

1.1. Aim

The aim of this study was to investigate the influence of work‐related factors on time to RTW after stroke, as well as possible differences between the sexes.

2. MATERIALS & METHODS

2.1. Study population

Patients with first‐ever stroke according to the International Classification of Diseases codes I61 intracerebral haemorrhage (ICH), I63 ischaemic stroke (IS) or I60 subarachnoidal haemorrhage (SAH), who were treated either at the Stroke Unit, the Neurosurgical Unit or the Intensive Care Unit at Sahlgrenska University Hospital, Sahlgrenska, Gothenburg, Sweden, and were residing in the Gothenburg urban area, were included consecutively between 4 February 2009 and 2 December 2010 to the Extended Stroke Arm Longitudinal Study at the University of Gothenburg (SALGOT‐extended).20, 21 In this sub‐study, only patients who were of working age (18‐63) at stroke onset were included in the analyses. Patients who were registered with sickness compensation prior to their stroke were also excluded from the analyses.

2.2. Data collection

The disease‐related characteristics were retrieved from medical records. The mortality rate and cause of death within the study period were retrieved from the mortality register at the National Board of Health and Welfare in Sweden. Information on disability benefits in terms of early retirement and sick leave up to 6 years post‐stroke was retrieved from the Swedish Social Insurance Agency. Work‐related data and sociodemographic data were retrieved from Statistics Sweden.

2.3. Return to work (RTW)

In this study, participants with early retirement prior to stroke onset were excluded from the analyses. Admittance to the hospital with stroke symptoms corresponds to time of entry into the study for each participant. The study period corresponds to the number of days with sickness benefits or sickness compensation post‐stroke, as registered by the Swedish Social Insurance Agency. The main outcome was RTW. RTW was defined as no longer being registered on sickness compensation or sickness benefits (either full‐time or part‐time) with the Swedish Social Insurance Agency after stroke, with the exception of leaving registration within one year from old‐age retirement (65 years) or within a month from dying, which was not considered as RTW. Data on sickness compensation and sickness benefits were retrieved from the Swedish Social Insurance Agency.

2.4. Covariates

Functional dependency at discharge from hospital was assessed with the modified Rankin Scale (mRS, 0‐6, lower score is better).22 Data were retrieved from medical records.

Educational level was categorized into three levels: ≤9 years of education, 10‐12 years of education and >12 years of education. Data were retrieved from Statistics Sweden.

Disposable income is presented in tens of thousands of Swedish crowns (SEK) and corresponds to the individual component of the total household income. Data were retrieved from Statistics Sweden.

Occupational qualification level was categorized into professional occupations and elementary occupations. Data were retrieved from Statistics Sweden.

Size of organization where employed was categorized into four categories: organizations with 1‐249 employees, organizations with 250‐1999 employees, organizations with 2000‐19 999 employees and organizations with >20 000 employees. Data were retrieved from Statistics Sweden.

Employment sector was categorized into public or private sector. Data were retrieved from Statistics Sweden.

2.5. Statistics

Data were analysed using the Statistical Package Software for the Social Sciences (SPSS version 22.0, Chicago, IL, USA). All tests were two‐sided, and P‐values <0.05 were considered significant. For graphical presentation of time to RTW, Kaplan‐Meier curves were used. The log‐rank test was used to analyse differences between groups in Kaplan‐Meier curves. Multiple Cox proportional hazard model was used to analyse predictors for time to return to work. Variables were included in the model based on clinical and theoretical relevance. Causes for censoring were death, and old‐age retirement, during the study period. Participants who died before RTW during the study period were set to censoring at the end of the study period, instead of at the time of death, to get a more conservative estimate for RTW. Censoring due to old‐age retirement was set at the time of retirement. To check for serious violations against the proportional hazard assumption of the Cox regression model, Kaplan‐Meier curves and log(−log(survival curves)) were used. To check for multi‐collinearity, Spearman correlation analysis was performed. To check for outliers, log transformation was used.

3. RESULTS

3.1. Characteristics

In total, 249 persons from the SALGOT‐extended cohort were of working age (18‐63) at the time of stroke, of whom 204 were not receiving sickness compensation prior to their stroke and were included in the analyses. Baseline characteristics of the study population are presented in Table 1, and 12.6% received reperfusion treatment.

Table 1.

Characteristics of the study population and comparisons between men and women (n = 204)

Characteristics Men Women p‐value
Total, n 136 68 0.007
Age at time of stroke, years median (min‐max) 53 (24‐63) 48 (21‐63)
Stroke type, n (%)
Ischaemic stroke 101 (74.3) 34 (50.0) 0.002
Intracerebral haemorrhage 22 (16.2) 17 (25.0)
Subarachnoidal haemorrhage 13 (9.6) 17 (25.0)
Functional dependency at discharge (mRS), n (%)
Independent (0‐2) 75 (55.1) 33 (48.5) 0.377
Dependent (3‐6) 61 (44.9) 35 (51.5)
Education level, n (%)
≤9 years 31 (23.0) 13 (20.0) 0.466
9‐12 years 59 (43.7) 27 (41.5)
>12 years 45 (33.3) 25 (38.5)
Disposable income (SEK), median (min‐max) 23.0 (0‐110.5) 18.7 (4.8‐143.9) 0.008
Occupational qualification level, n (%)
Professional occupations 65 (51.2) 35 (54.7) 0.759
Elementary occupations 62 (48.8) 29 (45.3)
Size of organization where employed, n (%)
1‐249 employees 53 (46.1) 13 (22.0) 0.001
250‐1999 employees 17 (14.8) 9 (15.3)
2000‐19 999 employees 26 (22.6) 18 (30.5)
>20 000 employees 19 (16.5) 19 (32.2)
Employment sector, n (%)
Public sector 52 (40.9) 40 (62.5) 0.006
Private sector 75 (59.1) 24 (37.5)

Missing values: Education level (n = 4), Occupational qualification level (n = 13), Size of organization where employed (n = 30), Employment sector (n = 13).

mRS: modified Rankin Scale; SEK: Swedish crowns.

Bold numbers represent the p‐values that are statistically significant (p < 0.05)

3.2. RTW

Out of the 204 persons included in the study, 152 (74.5%) RTW within the study period, 15 (7.4%) deceased before RTW, 10 (4.9%) went into old‐age retirement and 27 (13.2%) were still on sickness compensation at the end of the study period.

Out of the 152 persons who RTW within the study period, 99 (48.5%) RTW within one year, and after two years, 123 (60.3%) had RTW. In just over three years, all 152 (74.5%) had RTW. The RTW rate over different occupational groups is displayed in Figure 1.

Figure 1.

Figure 1

Return to work rate after stroke over different occupational groups

When analysing women and men separately, the percentage of men RTW was 77.2% and the percentage of women RTW was 69.1%. The mean time to RTW for men was 22.6 (SD 2.3) months, and for women 29.9 (SD 3.5) months, although the difference between groups was not significant (P = 0.091), see Figure 2.

Figure 2.

Figure 2

Cumulative incidence in time to return to work after stroke, stratified by sex

When dividing the population according to functional dependency at discharge, women and men who were functionally independent appeared to RTW in a similar pattern (P = 0.710), see Figure 3A. Men who were functionally dependent at discharge appeared to be more likely to return to work, and to RTW faster, than women who were functionally dependent, see Figure 3B. However, the difference between groups was not significant (P = 0.098).

Figure 3.

Figure 3

A, Cumulative incidence in time to return to work for persons who were physically independent at discharge from hospital after stroke, stratified by sex. B, Cumulative incidence in time to return to work for persons who were physically dependent at discharge from hospital after stroke, stratified by sex

3.3. Predictors for time to RTW

In the multivariable Cox regression model 6 years post‐stroke, having a qualified occupation and being employed in a large organization were work‐related factors that predicted shorter time to RTW when adjusted for age, sex, functional dependency at discharge and educational level, see Table 2.

Table 2.

Multivariable Cox regression 6 years post‐stroke in the total study population (n = 169)

Predictors for time to RTW HR 95% CI p‐value
Age 0.975 0.953‐0.997 0.026
Sex (male) 1.566 1.041‐2.355 0.031
Educational level
≤9 y 0.029
9‐12 y 0.723 0.441‐1.183 0.197
>12 y 0.449 0.246‐0.821 0.009
Disposable income 1.012 0.998‐1.027 0.081
Functional dependency at discharge (physically independent) 3.986 2.680‐5.928 <0.001
Occupational qualification level (qualified occupation) 1.859 1.198‐2.884 0.006
Size of organization where employed
1‐249 employees 0.042
250‐1999 employees 0.848 0.469‐1.532 0.584
2000‐19 999 employees 1.766 1.039‐3.003 0.036
>20 000 employees 1.874 0.901‐3.900 0.093
Employment sector (public) 0.699 0.392‐1.244 0.223

Bold numbers represent the p‐values that are statistically significant (p<0.05)

Being male was found to be a predictor for shorter time to RTW, see Table 2. When analysing women and men separately, the only work‐related predictor for shorter time to RTW in men was found to be having a qualified occupation, along with being physically independent at discharge and having a lower educational level, see Table 3.

Table 3.

Multivariable Cox regression model 6 years post‐stroke stratified by sex

Predictors for time to RTW Men (n = 111) Women (n = 58)
HR (95% CI) p‐value HR (95% CI) p‐value
Age 0.982 (0.955‐1.010) 0.210 0.958 (0.918‐1.000) 0.051
Educational level
≤9 y 0.049 0.070
9‐12 y 0.566 (0.314‐1.022) 0.059 1.654 (0.581‐4.707) 0.345
>12 y 0.399 (0.189‐0.843) 0.016 0.635 (0.190‐2.124) 0.461
Disposable income 1.015 (0.995‐1.036) 0.152 1.011 (0.984‐1.040) 0.427
Physically independent at discharge 3.346 (2.030‐5.515) <0.001 6.080 (2.635‐14.031) <0.001
Qualified occupation 2.065 (1.192‐3.578) 0.010 1.169 (0.464‐2.943) 0.740
Size of organization where employed
1‐249 employees 0.095 0.399
250‐1999 employees 0.790 (0.384‐1.621) 0.520 0.956 (0.260‐3.511) 0.946
2000‐19 999 employees 1.648 (0.902‐3.011) 0.104 2.164 (0.602‐7.783) 0.237
>20 000 employees 1.986 (0.788‐5.010) 0.146 1.161 (0.258‐5.223) 0.846
Employed in public sector 0.700 (0.340‐1.441) 0.333 1.135 (0.359‐3.587) 0.830

Bold numbers represent the p‐values that are statistically significant (p<0.05)

For women, no work‐related predictors were found and the only factor in the model that could predict shorter time to RTW was being physically independent at discharge, see Table 3.

4. DISCUSSION

We identified having a qualified occupation and working in a large organization as work‐related predictors for shorter time to RTW after stroke, based on data from the Social Insurance Agency. Men were more likely to RTW and being male predicted a shorter time to RTW. There were differences in work‐related predictors for RTW between the sexes, where having a qualified occupation predicted a shorter time to RTW in men but not in women.

The results showed that occupational qualification level prior to stroke was beneficial for RTW after stroke. This finding is in line with previous literature reviews based on self‐reported RTW.10, 11 Further, the RTW varied depending on occupational groups. The highest RTW rates were found in managers and in occupations requiring higher education qualifications. The lowest RTW rates were found in occupations involving service, care and shop sales work. Similar patterns in RTW rates distributed over these occupational groups have been described previously concerning self‐reported RTW.23 However, reasons for the distribution remain unclear. Lower chances for successful RTW in a general population based on national registry data were shown when characteristics of work demands and functional impairments overlap, where persons with psychological diagnoses had particular difficulties in RTW to occupations with psychologically demanding work, and persons with musculoskeletal diagnoses had particular difficulties in RTW to occupations with physically demanding work.24 One could argue that occupations involving service and care offer less flexibility regarding workplace adjustments than, for example, occupations involving managerial work tasks and could therefore be an explanation for the different RTW rates in different occupational groups.

To be employed in an organization of larger size seemed to be beneficial for RTW, which is in line with a previous literature review based on self‐reported RTW.13 This could indicate that larger organizations have better systems, more experience and resources to rehabilitate employees back to work.25 However, the Swedish legislation regarding the extensive employer responsibilities in the RTW process means good support for employees regardless of workplace.

Our results support the use of sex as a valuable predictor for RTW, with men being more likely to RTW, which has been shown concerning self‐reported RTW as well as RTW based on data from national registries.5, 10, 26, 27 However, men and women were functionally independent at discharge RTW in a similar pattern. Contrary to this, when physically dependent at discharge, men appeared to have better chances for RTW than women. Previous findings on RTW in men and women have also indicated gender differences, where women with illness‐restricted activity prior to stroke were found to have lower chances for self‐reported RTW within one year post‐stroke, compared to men with illness‐restricted activity prior to stroke.26 Another gender difference found in our study was that men benefitted from being employed in qualified occupations, while women did not. The gender differences in the RTW process after stroke could be related to the segregated labour market where different working conditions in typical female‐dominated occupations as compared to typical male‐dominated occupations mean less flexibility and possibilities for adjustments and contributes to an overrepresentation of women registered with sick leave in the Swedish Social Insurance Agency.

A limitation of this study is the missing data on occupational information. This is related to the system where work‐related data are reported yearly by all employers in Sweden to Statistics Sweden, and employers’ failure to report this data results in missing data. Another limitation is that the Swedish Social Security system allows for part‐time sick leave and part‐time disability benefits although in this study we have defined RTW as no longer being registered with the Swedish Social Insurance Agency to any extent. It could be assumed that some persons are included in the no‐RTW group who had actually partially RTW. Considering the small sample size of the subgroup analyses, the results should be interpreted with caution.

5. CONCLUSION

Work‐related predictors for shorter time to RTW after stroke were being a qualified worker and working in a larger organization. Male sex predicted a shorter time to RTW. The predictors differed between the sexes, where occupational qualification level was of importance for RTW in men but not in women. For women, the only predictor for shorter time to RTW was physical independency at discharge. Reasons for differences between men and women in work‐related factors that influence RTW need to be further investigated to better understand how to support women in the RTW process.

COMPETING INTERESTS

The authors have no competing interests to declare.

AUTHORS' CONTRIBUTIONS

AP worked with study acquisition, study design, data analysis, interpretation of data and first draft of the manuscript. EW worked with data analysis and interpretation of data, HCP worked with data analysis and interpretation of data, and KSS worked with study acquisition, study design and interpretation of data. All the authors were involved in writing the manuscript and revising it critically for important intellectual content. All the authors approved the final version of the article.

ETHICS APPROVAL AND CONSENT TO PARTICIPATE

The original SALGOT study and the follow‐ups with the Social Insurance Agency and Statistics Sweden were all approved by the Regional Ethics Committee in Gothenburg (Dnr: 225‐08, T801‐10, Dnr: 400‐13 and Dnr: T830‐15). The participants received information about the research and that it was voluntary to participate at the time of the follow‐up questionnaire. According to the Swedish Data Inspection Board, data that are handled within the frame of national quality registers are an exception from the general rule of informed consent because it allows improvement of the quality of care and treatment that is of general interest.

AVAILABILITY OF DATA AND MATERIALS

The data sets analysed during the current study are not publicly available due to ethical restrictions. According to the Swedish regulation http://www.epn.se/en/start/regulations/, the permission to use data is only for what has been applied for and then approved by the Ethical board. Data are available from the authors (contact Professor Katharina S. Sunnerhagen, email: ks.sunnerhagen@neuro.gu.se) upon reasonable request.

ACKNOWLEDGEMENTS

We would like to thank Dr Annelie Inghilesi Larsson for statistical advice. We would also like to thank Dr Kate Bramley‐Moore for checking the language of the manuscript.

Palstam A, Westerlind E, Persson HC, Sunnerhagen KS. Work‐related predictors for return to work after stroke. Acta Neurol Scand. 2019;139:382–388. 10.1111/ane.13067

Funding information

The study was funded by the Swedish Research Council for Health, Working Life and Welfare (FORTE) (grant number 2016‐00137), the Swedish Research Council (VR2017‐00946), the Norrbacka‐Eugenia foundation, the Swedish Brain Foundation, the Swedish Heart and Lung Foundation, the Swedish Stroke Association, the Renee‐Eander foundation, and Promobilia, the Swedish government and the county councils, the ALF agreement (ALF71980)

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Associated Data

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

Data Availability Statement

The data sets analysed during the current study are not publicly available due to ethical restrictions. According to the Swedish regulation http://www.epn.se/en/start/regulations/, the permission to use data is only for what has been applied for and then approved by the Ethical board. Data are available from the authors (contact Professor Katharina S. Sunnerhagen, email: ks.sunnerhagen@neuro.gu.se) upon reasonable request.


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