Sick leave duration as a potential marker of functionality and disease severity in depression

Immune indicators and depression in adolescents: Associations with monocytes, lymphocytes, and direct bilirubin

BACKGROUND

Depression is a significant psychiatric disorder with particularly high prevalence among adolescents. This mental health condition can have severe consequences, including academic failure, social withdrawal, and suicidal behavior. Given the increasing rate of depression in this age group, understanding the underlying biological mechanisms is essential for early detection and intervention. Recent studies have suggested that immune markers play a role in the pathophysiology of depression, prompting further investigation of their potential association with depressive symptoms in adolescents.

AIM

To investigate the relationship between immune markers (monocytes, lymphocytes, and direct bilirubin) and the incidence and severity of depression among adolescents.

METHODS

This cross-sectional study recruited 145 adolescent patients with depression [male (M)/female (F) = 38/107] from Jiangbin Hospital in Guangxi, Zhuang and 163 healthy controls (M/F = 77/86) from routine health check-ups. Blood samples were collected after an overnight fast. Depression severity was measured using the Zung Self-Rating Depression Scale. The inclusion criteria were age 12-24 years, diagnosis of depressive disorder (ICD-10), and no recent antidepressant use. The exclusion criteria included psychiatric comorbidities and serious somatic diseases. Key statistical methods included group comparisons and correlation analyses.

RESULTS

There was a higher prevalence of females in the depression group (P < 0.001). Significant age differences were observed between the groups (Z = 9.43, P < 0.001). The depression group had higher monocyte (Z = 3.43, P < 0.001) and lymphocyte (t = 2.29, P < 0.05) counts, and higher serum direct bilirubin levels (Z = 4.72, P < 0.001). Monocyte count varied significantly according to depression severity, with lower counts in the mild group (Z = -2.90, P < 0.05). A negative correlation between age and lymphocyte counts was observed (ρ = -0.22, P < 0.01). Logistic regression analysis showed that serum direct bilirubin levels significantly predicted depression.

CONCLUSION

The potential role of elevated levels of immune markers in the early detection of depression in adolescents has been highlighted. Therefore, it is necessary to explore further the relationships between these immune markers and depression.

Depression care trajectories and sustainable return to work among long-term sick-listed workers: a register-based study (The Norwegian GP-DEP Study)

BACKGROUND

Depressive disorders can negatively impact work life sustainability for affected individuals. Little is known about depression care trajectories and their association with sustainable return to work (SRTW) after long-term sick leave. This study aimed to identify depression care trajectories during the first three months of sick leave among long-term sick-listed workers with depression and investigate their associations with SRTW.

METHODS

DESIGN: Nationwide cohort study using linked data from Norwegian health and population registries.

STUDY POPULATION

All inhabitants of Norway aged 20-64 from 1 January 2009 to 1 April 2011, who were diagnosed with depression in general practice, and had reached three months consecutive sick leave (n = 13 624, 63.7% women).

EXPOSURE

Depression care trajectories during the first three months of initial sick leave, identified using group-based multi-trajectory modeling. Types of depression care included were general practitioner (GP) consults, GP longer consults and/or talking therapy, antidepressant medication (MED), and specialized mental healthcare.

OUTCOME

SRTW, measured by accumulated all-cause sickness absence days during two-year follow-up after initial sick leave, with cutoffs at 0, ≤ 30, and ≤ 90 days.

ANALYSIS

Gender stratified generalized linear models, used to investigate the associations between depression care trajectories and SRTW, adjusting for sociodemographic factors and sick leave duration.

RESULTS

Four depression care trajectory groups were identified: "GP 12 weeks" (37.2%), "GP 2 weeks" (18.6%), "GP & MED 12 weeks" (40.0%), and "Specialist, GP & MED 12 weeks" (8.7%). The "GP 12 weeks" group (reference) had the highest proportion attaining SRTW for both genders. Men in the "GP 2 weeks" group had a 12-14% lower likelihood for SRTW compared to the reference. Women in the "Specialist,GP & MED 12 weeks 12 weeks" group had a 19- 23% lower likelihood for SRTW compared to the reference.

CONCLUSION

The association between depression care trajectories and SRTW varies by gender. However, trajectories involving follow-up by the GP, including both standard and longer consults and/or talking therapy over 12 weeks, showed the highest likelihood of SRTW for both genders. Enhancing GP resources could improve SRTW outcomes by allowing more frequent and longer consultations or talking therapy.

General practitioners' attitudes and practices regarding sick leave certification for patients with depression in Norway - a cross-sectional study

BACKGROUND

Depression is among the most frequent reasons for sick leave, whereas health authorities recommend a rather strict practice, arguing that work is health-promoting. We aimed to explore GPs' attitudes and practices regarding sick leave certification for depressed patients.

METHODS

A cross-sectional study using the Norwegian Physician Survey (N = 1617, 70% response rate) in 2021. The GPs in the panel (N = 221) responded to questions about sick leave certification and cooperation with employers and the Norwegian Labour and Welfare Administration (Norwegian acronym: Nav) regarding patients with depression. We used crosstabulation with chi square statistics and logistic regression models to assess differences among GPs.

RESULTS

Among 221 GPs, 62% often/very often perceived patients' questions for sick leave certification as the main reason for encountering. A total of 46% often/very often considered patients' expectations inappropriate, with female GPs more frequently than male GPs (36% vs 56%, p = 0.005) and younger GPs more frequently than their older counterparts (p < 0.001). Although 68% considered sick leave as part of treatment, only 16% often/very often initiated sick leave unless patients raised the question. Sixty-seven percent of GPs reported to often/very often avoid sick listing, if possible, more females than males. GPs who often/very often considered questions for sick leave inappropriate less often considered sick leave as part of treatment (odds ratio (OR): 0.25; 95% CI: 0.13-0.49), and less often report a well-functioning cooperation with Nav (OR:0.37; 95% CI:0.14-0.96). GPs who often/very often considered sick leave as part of treatment more often proposed sick leave for their patients (OR:4.70; 96% CI 1.57-14.01) and reported a less strict approach to sick listing (OR: 40; 95% CI: 0.20-0.79). Ninety-five percent of the GPs rarely/never had direct contact with patients' employers, whereas 92% often/very often asked patients about their dialogue with the workplace. Eighty-eight percent of the GPs often/very often experienced cooperation with NAV as good, and 87% often/very often felt trusted by them.

CONCLUSIONS

Most GPs reported a strict attitude towards sick leave for depression, whereas one-third had a less strict approach. Different perceptions of the appropriateness of sick listing indicate variations in treatment and access to social security benefits.

Predictability of the National Psychological Stress Screening for Subsequent Long-Term Psychiatric Sick Leave Among Employees: A Multicenter Nested Case-Control Study

OBJECTIVE

The aim of the study is to predict employees' long-term sick leave due to psychiatric disorders using the national psychological stress screening program.

METHODS

University employees who took long-term psychiatric sick leave in 2016-2018 were assigned as cases. Those who were present at work and matched for sex, age, and occupation type were assigned as controls. Answers in a 57-item questionnaire were analyzed by multivariable regression, and a prediction model was developed. It was validated in cases and matched controls in 2019.

RESULTS

Six items were identified as independent predictors by multivariable regression and included in a prediction model. The area under the receiver-operating characteristics curve was 0.768 (95% confidence interval: 0.723-0.813). This finding was similar to that in the validation sample.

CONCLUSIONS

The performance of the prediction model was modest and the national Stress Check Program should be further refined.

Sick leave before, during, and after short-term outpatient psychotherapy: a cohort study on sick leave days and health care costs between behavioral and psychodynamic psychotherapies on anonymized claims data

BACKGROUND

Sick leave due to mental disorders poses a relevant societal and economic burden. Research on sick leave over a patient journey of individuals who received one of two treatment approaches - either behavioral (BT) or psychodynamic (PDT) psychotherapy - is scarce.

METHODS

We conducted a cohort study on anonymized German claims data for propensity-score matched patients who received short-term outpatient BT or PDT. We analyzed sick leave days and direct health care costs one year before, during, and one year after psychotherapy.

RESULTS

We analyzed data of patients who received BT and PDT, with N = 14 530 patients per group after matching. Patients showed sick leave days per person year of 33.66 and 35.05 days before, 35.99 and 39.74 days during, and 20.03 and 20.95 days after BT and PDT, respectively. Sick leave rates were overall higher in patients who received PDT. Both patient groups showed reductions of roughly 14 sick leave days per year, or 40%, from before to after therapy without a difference between BT and PDT (difference-in-difference [DiD] = -0.48, 95%-confidence interval [CI] -1.61 to 0.68). Same applies to direct health care costs which reduced in both groups by roughly 1800 EUR (DiD = 0, 95%-CI -158 to 157).

CONCLUSIONS

Results suggest similar reductions in sick leave days and direct health care costs from before to after BT and PDT. As sick leave is discussed to serve as an indicator of overall health and functioning in mental disorders, both treatments may have a similar positive impact on mental health.

The association of sociodemographic characteristics with work disability trajectories during and following long-term psychotherapy: a longitudinal register study

PURPOSE

This register-based study examined the trajectories of depression or anxiety disorder-related work disability during and following long-term psychotherapy and identified sociodemographic factors that indicate membership in different trajectory groups.

METHODS

Data were drawn from national registers (Statistics Finland, Social Insurance Institution of Finland). Participants included a random sample of Finnish working-age individuals (18-55 years) who started psychotherapy treatment between 2011 and 2014 and were followed for 5 years: 1 year before and 4 years after the onset of psychotherapy (N = 3 605 individuals; 18 025 person-observations across five time points). Group-based trajectory modeling was applied to assign individuals to work disability trajectories by the number of annual mental health-related work disability months. Multinomial logistic regression was used to examine the associations between trajectory group membership and baseline sociodemographic factors of age, gender, occupational status, and geographical area of residence.

RESULTS

Four mental health-related work disability trajectories were identified: stable very low (72%), decrease (11%), persistent low (9%) and persistent high (7%). Those with older age, female gender, lower occupational status, and living in sparsely populated geographical areas were more likely to belong to the most unfavorable trajectory group of persistent high work disability. The presence of multiple risk characteristics substantially increased the probability of belonging to the most adverse trajectory group.

CONCLUSIONS

Sociodemographic factors were associated with the course of mental health-related work disability in association with psychotherapy. Rehabilitative psychotherapy does not function as an equal support resource for work ability in all parts of the population.

Quality of life, sense of coherence and occupational balance one year after an occupational therapy intervention for people with depression and anxiety disorders

BACKGROUND

Quality of life (QOL), sense of coherence (SOC) and occupational balance (OB) have been found to increase after rehabilitation among people living with depression and anxiety. However, these aspects have not been investigated over time in participants with different paid work situations, such as being on sick leave or not.

OBJECTIVE

To describe and compare the self-rated QOL, SOC and OB after participation in occupational therapy in three groups of people with depression and anxiety disorders based on their work situation during the study period: continuous sick leave, return to work and continuous work.

METHODS

Forty-seven women and seven men, 19-60 years old with depression and anxiety were followed over time. They completed questionnaires on QOL, SOC and OB on four occasions. Data were analyzed with non-parametric statistics.

RESULTS

No statistically significant differences between the groups were identified. All groups improved in at least one of the studied areas over time: the sick leave group in OB; the return-to-work group in QOL and OB; and the Work group in QOL and SOC.

CONCLUSION

The results indicate variations in QOL, SOC and OB between people with different work situations over time after occupational therapy. Studies with larger samples are, however, warranted.