Implementation of depression and anxiety screening in patients undergoing radiotherapy

Abstract

Anxiety and depression are disabling, underdiagnosed issues that affect the management of oncology patients. Until recently, there has been no standard protocol for screening and treating these ailments at our cancer centre. The purpose of this institutional review board-approved study was to analyse the implementation of a screening tool in our clinical workflow with the aim of screening over 90% of patients and increasing referrals to mental health services by 50%.

Problem

Oncologic patients undergoing radiation therapy are at high risk for mental health disorders such as anxiety and depression. Evidence shows that early treatment and diagnosis of anxiety and depression reduces clinical morbidity and improves patient outcomes.² Historically, our cancer centre did not have a routine process for screening or referring patients to clinical health psychology, potentially putting our patients at risk for underdiagnosis and undertreatment of these ailments.

To address these issues, our cancer centre started an initiative to screen patients for depression and anxiety. To determine the programme’s efficacy, the department of radiation oncology piloted a version of this intervention before implementation throughout the entire cancer centre.

Background

Depression and anxiety are among the most prevalent and disabling medical conditions in the USA, yet they are often underdiagnosed in the general population, much less among those with cancer. A recent publication by the US Preventive Services Task Force reflects this issue and attempts to address it by recommending routine screening for depression in the general adult population, provided there are adequate systems in place to ensure accurate diagnosis, effective treatment and appropriate follow-up.² Such screening has led to decreased clinical morbidity and improved clinical outcomes.² Additionally, there is no evidence that screening for depression or anxiety causes harm.³

Patients with cancer are at an increased risk of depression and anxiety compared with the general population. Not only do they face difficult treatment courses and sometimes end-of-life issues, but they may also be subjected to the stressors of living away from home, oncological pain, inability to care for themselves or costly medical procedures.^4–10 In fact, in a survey of over 100 patients with non-small cell lung cancer, almost 50% self-reported their depression.¹⁰ We propose that by initiating screening and appropriate treatment, we will better diagnose and manage these illnesses.

Baseline measurement

Under institutional review board approval, baseline measurements were obtained by retrospectively reviewing all patients treated in the previous 5 months prior to the intervention. Information obtained included age, gender, diagnosis, the intent of treatment such as curative or palliative, history of mental health illness and current medications.

Of the identified 58 individuals, the median age was 65 (range 27–89), and 67% (n=39) were treated with curative-intent radiotherapy (RT). The primary sites of disease included lung (72%; n=42), gynecologic (22%; n=13) and other (6%; n=3). No patient was screened for anxiety or depression at baseline, nor were any of these patients referred to mental health services by the radiation oncology department. Conversely, the medical oncology department referred three patients seen in radiation oncology to mental health services. Although not our primary study metric, since this study was not designed to assess the adequacy of medication use in patients with known mental health issues, we retrospectively reviewed, and reported baseline data show that 53% (n=31) of patients had been on an anxiolytic (n=15) or antidepressant (n=24) within the year prior to beginning RT.

Design

At the start of RT, nurses administered the Patient Health Questionnaire-4 (PHQ-4). The PHQ-4 was chosen because it is a four-question validated screening tool to assess both anxiety and depression in the outpatient setting and because versions of this test have been used to assess patients with cancer, which represents our target population.^{1 11–13} In regard to diagnostic testing, our oncology social workers conducted a thorough diagnostic assessment in which they performed evaluations for depression and anxiety along with other aetiologies, such as an adjustment disorder or substance abuse and, when necessary, placed a referral to clinical psychology. Patients with a total score of 6 or greater were automatically referred to an oncology social worker. The social worker assessed for other aetiologies, such as an adjustment disorder or substance abuse and, when necessary, placed a referral to clinical psychology. Study aims were to screen over 90% of patients for depression or anxiety and to increase referrals to mental health services by 50%.

Detailed medication history was also obtained to determine the anxiolytic or antidepressant medications at the start of treatment for all patients and subsequently added to the electronic medical record. We updated this list on a weekly basis and recorded when a new medication was started.

Strategy

Several Plan, Do, Study, Act (PDSA) cycles were used during the development phase of this quality improvement project:

PDSA cycle 1

We implemented the intervention with the plan to refer all patients with a positive screening directly to clinical psychology for assessment.

PDSA cycle 2

After the initial implementation, we found it difficult for the clinical psychology service to manage the increase in referrals. The decision was made to instead have the patients first referred to an oncology social worker for an initial evaluation. They were then assessed more thoroughly for depression and anxiety along with adjustment disorders or substance abuse, and, if deemed appropriate by the social worker, patients would be further referred to clinical psychology.

PDSA cycle 3

After discussion with treating physicians, we realised that the information about the screening was not reaching the physicians. We developed a clear pathway for this information to be seen and acted on by the treating radiation oncologist.

PDSA cycle 4

Interim analysis was performed 3 months after study initiation showing that we were able to effectively implement screening into the clinical workflow without noticeable reductions in workflow or patient care. Following an additional 4 months of study with the continued positive results, we have since implemented anxiety and depression screening prior to the start of radiation treatments for every patient in our clinic, and this process has been integrated into our electronic medical record system.

PDSA cycle 5

To maintain sustainability of the programme, we have recently hired a dedicated social worker for the department of radiation oncology to facilitate diagnostic screenings and evaluations. We have also partnered with the medical oncology department and cancer centre to standardise the screening tools used in these evaluations. Owing to discussions with our clinical health psychologists, we replaced the PHQ-4 with the PHQ-2 alongside the perceived stress scale (PSS) to ensure that the entire cancer centre is using an analogous system, thereby improving the sustainability of the programme.

Results

Patient characteristics comparing baseline measurements and following intervention are shown in table 1. Results of our study aims were conducted at two separate time intervals following the intervention.

Table 1.

Patient characteristics

Characteristics	Preintervention (n=58)	Postintervention (n=119)
Median patient age (range)	65 (27–89) years	65 (26–89) years
Gender (men/women)
Male	31 patients	58 patients
Female	27 patients	61 patients
Primary site
Lung	72% (42 patients)	66% (79 patients)
Gynecologic	22% (13 patients)	26% (31 patients)
Other	6% (3 patients)	8% (9 patients)
Intent of treatment
Curative	67%	68%
Palliative	33%	32%

First postintervention measurement

The first analysis was performed 3 months after implementing the study intervention. The median age of the initial 36 patients enrolled following implementation was 68 years (range 38–82 years). Overall, 66% (n=23) were treated with curative-intent RT, and primary disease sites included lung (53%; n=19), gynecologic (31%; n=11) and other (16%; n=6). Of these individuals, 97% (35/36) were screened for anxiety and depression using the PHQ-4, of which 25% (n=9) screened positive for the composite score. Further, 11% (n=4) of the patients screened or 33% of those with a positive screening test were referred to clinical psychology. Interim analysis showed that we were able to effectively implement screening into the clinic without any noticeable reductions in workflow or patient care.

Second postintervention measurement

Following an additional 4 months of the intervention, we accrued 83 more patients for a total of 119 patients. Overall, 92% (109/119) of patients were screened for anxiety and depression using the PHQ-4 following the intervention. Of those screened, 21% (23/109) were positive for the composite score of either anxiety or depression. Figure 1 depicts a run chart illustrating the number of patients who screened positive over time. Five per cent (n=6) of the patients screened or 22% of those with a positive screening test were referred to clinical psychology. Of note, 16 patients who screened positive on PHQ-4 testing and were offered referral to clinical health psychology declined further intervention for the following reasons: not interested at this time (n=14), good social support (n=1) and had tried in the past but did not work as well as hoped (n=1). The reason for one patient not being referred was not documented.

Figure 1.

Run chart illustrating the number of positive screening tests over time.

Interestingly, prior to screening, 45% (n=54) of patients were already taking either only an anxiolytic (n=31) or antidepressant (n=41) before starting RT. Of the remaining 65 patients, 22% (n=14) were started on an anxiolytic (n=7) or antidepressant (n=12) during RT.

Lessons

By implementing a simple screening tool for anxiety and depression in the radiation oncology clinic, we were able to screen 92% of patients, with 21% screening positive for the PHQ-4 composite score. This screening programme resulted in referring 26% of patients who screened positive for anxiety and/or depression to clinical psychology. In the study period prior to the intervention, no patients were referred to clinical psychology from the radiation oncology department. Based on the encouraging results of this study, we have since implemented anxiety and depression screening prior to the start of radiation treatments for every patient in our clinic and integrated the process into our electronic medical records system. We have also hired an oncology social worker dedicated to the radiation oncology department rather than relying on a shared oncology social worker. A dedicated social worker for this programme is of particular importance now that more providers and staff will be using this system. We have also partnered with the medical oncology department and cancer centre to standardise the screening tools used. As mentioned, we replaced the PHQ-4 with the PHQ-2 alongside the PSS. The PSS replaces two questions regarding anxiety in the PHQ-4, and the PSS is also a common screening tool used with patients with cancer.¹⁴ Although our processes have changed since our initial study, the current system incorporates processes that the medical oncology department has used successfully in the past and ensures the viability and robustness of the programme across the entire cancer centre.

The most significant lesson from this intervention relates to the integration of care between physicians and support staff. This intervention was driven by the nurses and social workers who are conducting the assessments and educating patients on mental health disorders. The system still relies heavily on supporting social work and clinical psychology staff and would have proved difficult to implement without them. In fact, the US Preventive Services Task Force notes in their updated guidelines that screening must be performed with adequate systems in place to ensure that once patients screen positive, they are appropriately diagnosed and treated. Additionally, there remains to be a stigma associated with seeking counselling. The overwhelming majority of those patients who were recommended for further counselling declined stating that they were not interested at that time.

Limitations

Our intervention waslimited to one service including only thoracic and gynecological disease sites. The results of the intervention might vary with the introduction of patients with different types of malignancies. Long-term follow-up will also be required to assess whether patients can maintain successful continuation of needed psychological services. For instance, most of our patients are travelling from far distances and therefore might have difficulty receiving counselling by our institution’s clinical psychology services. Therefore, either integration or transfer of services from our tertiary care centre to a local provider would be necessary. An alternative would be coordinating oncological follow-up with clinical psychology to minimise travel burden. Ultimately, this would remain an issue that requires further study.

Conclusion

Following implementation of the PHQ-4 screening tool as part of the new patient workflow, 92% of patients were screened for anxiety and depression. Of those screened, 21% had a positive test for depression, anxiety or both. This resulted in 5% of all patients or 26% of the screen-positive patients being referred to clinical psychology, a significant improvement compared with 0% before the intervention. The screening and referral process was easily integrated into the new patient workflow and electronic medical record system, although the next step in implementation should focus on barriers to receiving psychological counselling as 70% of patients declined referral.