COVID-19: incidence and mortality in Sweden comparing all foreign-born to all Swedish-born individuals in different occupations in an unvaccinated cohort of year 2020

OBJECTIVES

The aim was to analyse the incidence and mortality of COVID-19 in immigrants compared with Swedish born in inpatients and outpatient registers, respectively.

METHODS

The study population included all persons 20-88 years of age living in Sweden, 31 December 2019, including 1 676 516 foreign-born persons and 6 037 151 Swedish-born persons. The outcome was clinical cases of COVID-19 with a positive PCR test (ICD-10 U07.01) or without a positive PCR test (U07.2) from 1 January to 31 December 2020. Persons 20-64 years of age were classified with occupational titles according to the Swedish Standard Classification of Occupations. Residing municipality of each individual was coded according to the Swedish Association of Local Authorities. Relative risks (RR) were calculated by sex in 5 years age bands using Swedish born as reference. Age-adjusted RRs (adj RR) with 95% CIs were calculated in a Poisson regression model. Rural municipalities were used as the reference category.

RESULTS

Foreign born had consistently higher RRs in COVID-19, regardless of sex, with a peak in 50-69 years of age. Foreign born had a higher RR of death in COVID-19 above 50 years and 40 years of age in women and men, respectively. Among occupations, male drivers had the highest adj RR 4.37 (95% CI 3.45 to 5.54) and 5.09 (4.26 to 6.07) in outpatients and inpatients, respectively (U07.1). Persons living in commuting municipalities did not show any consistent increased risk for COVID-19.

CONCLUSION

Foreign born have a higher risk of COVID-19 compared with Swedish-born individuals at any age and occupation before vaccination began in 2021.

Attention-Deficit/Hyperactivity Disorder Medications and Work Disability and Mental Health Outcomes

Importance

Individuals with attention-deficit/hyperactivity disorder (ADHD) often have comorbid psychiatric conditions. Relatively little is known about how specific ADHD medications are associated with overall treatment outcomes among these patients.

Objective

To investigate the association of the use of specific ADHD medications with hospitalization outcomes and work disability among adolescents and adults with ADHD.

Design, Setting, and Participants

This nationwide register-based cohort study identified individuals (aged 16-65 years) with ADHD from Swedish nationwide registers of inpatient health care, specialized outpatient health care, sickness absence, and disability pension during the years 2006 to 2021. Data analysis was performed from November 2022 to August 2023.

Exposure

Use of specific ADHD medications.

Main Outcomes and Measures

The main outcome measure was psychiatric hospitalization, and secondary outcomes were suicide attempt and/or death by suicide, nonpsychiatric hospitalization, and work disability (ie, sickness absence or disability pension). The risk of outcomes between use vs nonuse periods of ADHD medications was compared in a within-individual design, where a person acts as their own control, and was analyzed with stratified Cox models.

Results

A total of 221 714 persons with ADHD were included in the study cohort (mean [SD] age, 25.0 [11.2] years; 120 968 male individuals [54.6%]). Methylphenidate was the most commonly used ADHD medication (151 837 individuals [68.5%]), followed by lisdexamphetamine (78 106 individuals [35.2%]) during the follow-up (mean [SD], 7.0 [4.7] years). The following medications were associated with a decreased risk of psychiatric hospitalization: amphetamine (adjusted hazard ratio [aHR], 0.74; 95% CI, 0.61-0.90), lisdexamphetamine (aHR, 0.80; 95% CI, 0.78-0.82), ADHD drug polytherapy (aHR, 0.85; 95% CI, 0.82-0.88), dexamphetamine (aHR, 0.88; 95% CI, 0.83-0.94), and methylphenidate (aHR, 0.93; 95% CI, 0.92-0.95). No associations were found for modafinil, atomoxetine, clonidine, and guanfacine. Decreased risk of suicidal behavior was associated with the use of dexamphetamine (aHR, 0.69; 95% CI, 0.53-0.89), lisdexamphetamine (aHR, 0.76; 95% CI, 0.68-0.84), and methylphenidate (aHR, 0.92; 95% CI, 0.86-0.98). None of the medications was associated with increased risk of nonpsychiatric hospitalization; instead, use of amphetamine, lisdexamphetamine, polytherapy, dexamphetamine, methylphenidate, and atomoxetine were associated with decreased risk of nonpsychiatric hospitalization. The results regarding work disability were significant only for the use of atomoxetine (aHR, 0.89; 95% CI, 0.82-0.97), especially among adolescents and young adults aged 16 to 29 years, (aHR, 0.82; 95% CI, 0.73-0.92).

Conclusions and Relevance

In this nationwide cohort study of adolescents and adults with ADHD, the use of ADHD medication was associated with fewer hospitalizations for both psychiatric and nonpsychiatric morbidity and lower suicidal behavior.

Labour market integration among young adults diagnosed with attention-deficit/hyperactivity disorder (ADHD) at working age

METHODS

Multiple Swedish nationwide registers were used to identify 8045 individuals, aged 20-29, with an incident diagnosis of ADHD 2006-2011. Labour market integration was conceptualized according to the core-peripheral model as a continuum from a strong (core) to a weak (peripheral) connection to the labour market. Sequence analyses categorized clusters of labour market integration, from 1 year before to 5 years after their ADHD diagnosis for individuals diagnosed with ADHD and a matched control group without ADHD. Multinomial logistic regression computed odds ratios (ORs) with 95% confidence intervals (CIs) between sociodemographic factors and comorbid disorders and the identified clusters.

RESULTS

About one-fourth of the young adults diagnosed with ADHD belonged to clusters characterized by a transition to a mainly peripheral labour market position, which was approximately four-times higher compared to controls without ADHD. Foremost, those living in small cities/villages (OR 1.9; CI 1.5-2.2), those having comorbid autism-spectrum disorder (OR 13.7; CI 6.8-27.5) or schizophrenia/psychoses (OR 7.8; CI 3.8-15.9) were associated with a transition towards a peripheral labour market position throughout the study period. Those with a high educational level (OR 0.1; CI 0.1-0.1), and men (OR 0.7; CI 0.6-0.8) were less likely to have a peripheral labour market position.

CONCLUSIONS

Young adults diagnosed with ADHD are four-times more likely to be in the peripheral labour market position compared to those without ADHD. To increase labour market participation, special attention is warranted to those with low educational level, those living outside big cities and those with comorbid mental disorders.

Sustainable labour market participation among working young adults with diagnosed attention deficit/hyperactivity disorder (ADHD)

Background

The aims were to study the sustainability of labour-market participation five years after an incident diagnosis of attention-deficit/hyperactivity disorder (ADHD) among young adults with gainful employment, and to examine the impact of sociodemographic-, work- and health-related factors on these findings.

Methods

Swedish registers identified 2517 individuals, 19-29 years old, with an incident diagnosis of ADHD and gainful employment during 2006-2011. Labour-market participation was measured by the core-peripheral model, a model that measures the connection to the labour market from a weak connection (peripheral) to a strong connection (core). Sequence analysis analysed clusters of labour-market participation, from one year before and up to five years after diagnosis. Odds ratios (OR) with 95% confidence intervals (CI) between sociodemographic factors, comorbid disorders, and the identified clusters were analysed by multinomial logistic regression.

Results

Five clusters of labour-market participation were identified: 60% of individuals belonged to a cluster that maintained labour-market participation throughout the study period (core, close to core); 20% belonged to a cluster with a transition to a weak connection to the labour market (close to peripheral, peripheral); and 20% belonged to a cluster with "middle" labour-market participation, characterised by having long periods of sick leave and unemployment. Individuals with elementary school as highest attained education (OR:4.03;CI:2.35-6.93), comorbid mental disorders (OR:2.77;CI:2.10-3.66), or living in villages/small cities (OR:1.77;CI:1.25-2.51) were most likely to belong to a cluster transitioning towards a "peripheral" labour-market participation. Men were less likely to have peripheral labour-market participation than women (OR:0.55;CI:0.40-0.75).

Conclusions

Over half of working individuals with ADHD maintain a strong attachment to the labour market several years after their first diagnosis of ADHD. Therefore, it is important to target those who have problems maintaining a position in the labour market, including women, those with low educational levels, and those living outside large cities.

Risk factors for common mental disorders in young refugees from Iran, Somalia and Syria to Sweden

BACKGROUND

Our primary aim was to determine sociodemographic and health-related risk factors for diagnosed common mental disorders (CMDs) among young refugees in Sweden.

METHODS

All young adult refugees from Iran, Somalia and Syria (n = 7192), who were residents in Sweden in 2009, were followed from 2010 to 2013 regarding diagnosed CMDs. Cox regression models were used to compute hazard ratios (HRs) of CMDs with 95% confidence intervals (CIs).

RESULTS

Those arriving as unaccompanied refugee minors had a lower risk of being diagnosed with CMDs (HR: 0.7; 95%CI: 0.6-0.9) than those arriving as accompanied refugee minors. A higher risk of being diagnosed with CMDs was also found in female refugees (HR: 1.3; 95%CI: 1.1-1.5) compared with male refugees. In addition, individuals with a low (HR: 1.7; 95%CI: 1.3-2.3) or a medium (HR: 1.4; 95%CI: 1.1-1.8) educational level were found to have a higher risk of being diagnosed with CMDs compared with individuals with a high educational level. Refugees from Iran (HR: 2.3; 95%CI: 1.8-2.9) had a higher risk of a diagnosis of a CMD than refugees from Somalia. Moreover, refugees with a diagnosis of a mental disorder other than a CMD (HR: 4.2; 95%CI: 2.8-6.1), digestive (HR: 1.5; 95%CI: 1.0-2.2) or musculoskeletal diseases (HR: 1.5; 95%CI: 1.0-2.2) had a higher risk of being diagnosed with subsequent CMDs, compared with those with no such disorders.

CONCLUSIONS

Pre-existing diagnoses of mental disorders other than CMDs, and digestive and musculoskeletal disorders should be carefully considered in clinical assessments to initiate early interventions to prevent CMDs.

Psychosocial and organisational work factors as predictors of sickness absence among professionally active adults with common mental disorders

BACKGROUND

The incidence of sickness absence (SA) due to common mental disorders (CMDs) has increased in recent decades. It is hence important to elucidate how individuals with CMDs can maintain work. The aim was to analyse the relationship between psychosocial and organisational workplace factors and a spell of > 14 days of SA among persons with CMDs.

METHODS

Included were respondents of the Swedish Work Environment Survey (SWES) 1993-2013, diagnosed with a CMD up to five years before the interview in the SWES (n = 3,795). Relative Risk (RR) regression models with 95% Confidence Intervals (CIs) analysed associations between psychosocial-, and organisational workplace factors and a subsequent spell of SA > 14 days.

RESULTS

Low control over work (RR:1.16; CI:1.01-1.35), job strain (RR:1.25; CI:1.04-1.49), no flexible working hours (RR:1.25; CI:1.08-1.45) or no possibility to work from home (RR:1.37; CI:1.13-1.66) were significantly related to an increased risk of SA. Persons diagnosed with depression experiencing job strain had the highest increased risk of SA (RR:1.55; CI: 1.07-2.25).

CONCLUSIONS

A sustainable work-life among working individuals with CMDs can be provided by reducing job strain, and if possible, by increasing flexibility regarding workplace and working hours. This may prevent spells of SA, and hereby increase productivity.

Time period effects in work disability due to common mental disorders among young employees in Sweden-a register-based cohort study across occupational classes and employment sectors

BACKGROUND

We aimed to investigate time period effects in the risk of work disability, defined as long-term sickness absence (LTSA) and disability pension (DP) due to common mental disorders (CMDs), among young employees according to employment sector (private/public) and occupational class (non-manual/manual).

METHODS

Three cohorts, including all employed individuals with complete information on employment sector and occupational class, aged 19-29 years and resident in Sweden on 31 December 2004, 2009 and 2014 (n = 573 516, 665 138 and 600 889, respectively) were followed for 4 years. Multivariate-adjusted hazard ratios (aHRs) with 95% confidence intervals (CIs) were estimated to examine the risk of LTSA and DP due to CMDs using Cox regression analyses.

RESULTS

In all cohorts, public sector employees had higher aHRs for LTSA due to CMDs than private sector employees, irrespective of occupational class, e.g. aHR, 95% CI: 1.24, 1.16-1.33 and 1.15, 1.08-1.23 among non-manual and manual workers in cohort 2004. The rates of DP due to CMDs were much lower in cohorts 2009 and 2014 than 2004 leading to uncertain risk estimates in the later cohorts. Still, public sector manual workers had a higher risk for DP due to CMDs than manual workers in the private sector in cohort 2014 than in 2004 (aHR, 95% CI: 1.54, 1.34-1.76 and 3.64, 2.14-6.18, respectively).

CONCLUSIONS

Manual workers in the public sector seem to have a higher risk of work disability due to CMDs than their counterparts in the private sector calling for the need for early intervention strategies to prevent long-term work disability.

Labour market marginalisation in young adults diagnosed with attention-deficit hyperactivity disorder (ADHD): a population-based longitudinal cohort study in Sweden

BACKGROUND

The objective of this population-based register study was (1) to investigate the association between young adults diagnosed with attention-deficit/hyperactivity disorder (ADHD) and subsequent labour market marginalisation (LMM) in two comparison groups, i.e. matched young adults from the general population without ADHD and unaffected siblings to persons with ADHD and (2) to assess the role of comorbid disorders.

METHODS

This study included all young adults in Sweden, aged 19-29 years, with an incident diagnosis of ADHD 2006-2011 (n = 9718). Crude and multivariate sex-stratified hazard ratios (HRs) with 95% confidence intervals (CIs) were measured 5 years after the diagnosis of ADHD for the risk of disability pension, long-term sickness absence (SA) (>90 days), long-term unemployment (>180 days) and a combined measure of all three in young adults with ADHD compared to their siblings without ADHD and a matched comparison group.

RESULTS

In the adjusted analyses young adults with ADHD had a 10-fold higher risk of disability pension (HR = 10.2; CI 9.3-11.2), a nearly three-fold higher risk of long-term SA (HR = 2.7; CI 2.5-2.8) and a 70% higher risk of long-term unemployment (HR = 1.7; CI 1.6-1.8) compared to the matched comparison group. The risk estimates were lower compared to siblings for disability pension (HR = 9.0; CI 6.6-12.3) and long-term SA (HR = 2.5; CI 2.1-3.1) but higher in the long-term unemployed (HR = 1.9; CI 1.6-2.1). Comorbid disorders explained about one-third of the association between ADHD and disability pension, but less regarding SA and long-term unemployment.

CONCLUSIONS

Young adults with ADHD have a high risk for different measures of LMM and comorbidities explain only a small proportion of this relationship.

Patient factors associated with receipt of psychological and pharmacological treatments among individuals with common mental disorders in a Swedish primary care setting

BACKGROUND

Psychological and pharmacological therapies are the recommended first-line treatments for common mental disorders (CMDs) but may not be universally accessible or utilised.

AIMS

To determine the extent to which primary care patients with CMDs receive treatment and the impact of sociodemographic, work-related and clinical factors on treatment receipt.

METHOD

National registers were used to identify all Stockholm County residents aged 19-64 years who had received at least one CMD diagnosis (depression, anxiety, stress-related) in primary care between 2014 and 2018. Individuals were followed from the date of their first observed CMD diagnosis until the end of 2019 to determine treatment receipt. Associations between patient factors and treatment group were examined using multinomial logistic regression.

RESULTS

Among 223 271 individuals with CMDs, 30.6% received pharmacotherapy only, 16.5% received psychological therapy only, 43.1% received both and 9.8% had no treatment. The odds of receiving any treatment were lower among males (odds ratio (OR) range = 0.76 to 0.92, 95% CI_{[minimum, maximum]} 0.74 to 0.95), individuals born outside of Sweden (OR range = 0.67 to 0.93, 95% CI_{[minimum, maximum]} 0.65 to 0.99) and those with stress-related disorders only (OR range = 0.21 to 0.51, 95% CI_{[minimum, maximum]} 0.20 to 0.53). Among the patient factors examined, CMD diagnostic group, prior treatment in secondary psychiatric care and age made the largest contributions to the model (R² difference: 16.05%, 1.72% and 1.61%, respectively).

CONCLUSIONS

Although over 90% of primary care patients with CMDs received pharmacological and/or psychological therapy, specific patient groups were less likely to receive treatment.

Childhood adversity and risk of later labor market marginalization in young employees in Sweden

BACKGROUND

The present study examined the independent and combined effects of childhood adversity (CA) and occupational class on the risk of future labor market marginalization (LMM) in young employees in Sweden. Occupational class (non-manual/manual workers) was also explored as a potential mediator.

METHODS

This population-based longitudinal cohort study included 556 793 employees, 19-29 years, residing in Sweden in 2009. CAs included parental death, parental mental and somatic disorders, parental separation, household public assistance, single-parent household and residential instability. Measures of LMM included long-term unemployment (LTU), long-term sickness absence (LTSA) and disability pension. Estimates of risk of each LMM measure, between 2010 and 2016 were calculated as hazard ratios (HRs) with 95% confidence intervals (CIs), using a Cox regression analysis.

RESULTS

Those exposed to CA had an elevated risk for all measures of LMM. Manual workers with a history of household public assistance had the highest risk estimates compared to non-manual workers with no CAs [adjusted HR spanning from 1.59 (LTSA) to 2.50 (LTU)]. Regardless of occupational class, the risk of LMM grew higher with increasing number of CAs (e.g. adjusted HR of LMM in manual workers with 3+ CAs: 1.87, 95% CI: 1.81-1.94). These patterns persisted after adjustments for a range of confounders, including psychiatric and somatic morbidity. Last, we found a small but significant mediating effect of occupational class in the association between CA and LMM.

CONCLUSIONS

Information on CAs are important determinants of LMM in young adults, and especially in manual workers.

Period effects in the risk of labour market marginalization among refugees in Sweden: a register-based cohort study

BACKGROUND

Changes in Swedish national insurance policies over time and/or migration-related health inequalities may influence the risk for labour market marginalization (LMM) in refugees as compared to the Swedish-born host population. This study aimed to investigate potential period effects in the association between refugee status and the risk of LMM and explore any differences by country of birth, age and duration of residence.

METHODS

Using national registers, three cohorts including all Swedish residents during 1999, 2004 and 2009 were followed for 4 years (cohort 2000, 2005 and 2010). Cox regression models were used to examine associations between refugee status and LMM defined as long-term unemployment (>180 days annually) and disability pension. The analyses were adjusted for socio-demographic factors, morbidities and labour market-related factors. Stratified analyses were run for age, country of birth and duration of residence.

RESULTS

Across the cohorts, hazard ratios (HRs) were higher for long-term unemployment [2000: HR = 1.98; 95% confidence interval (CI): 1.96-2.01; 2005: HR = 2.30; 95% CI: 2.27-2.33; 2010: HR = 2.78; 95% CI: 2.75-2.81] for refugees compared to Swedish-born but not for disability pension. HRs for long-term unemployment were highest among refugees aged 25-34 and 35-44 years, from Somalia, Afghanistan and Iraq and refugees with a shorter duration of residence.

CONCLUSIONS

The risk of long-term unemployment appears to have increased for refugees over time. Particularly some refugee subgroups experienced more difficulties. These findings highlight ongoing disparities for refugees and implicate on a broader scale that changes in policies such as stricter regulations in the insurance or healthcare system might adversely affect them.

The role of sociodemographic and clinical factors in the initiation and discontinuation of attention deficit hyperactivity disorder medication among young adults in Sweden

Introduction

Long-term medication use is a recommended treatment for attention-deficit/hyperactivity disorder (ADHD), however, discontinuation is common. Non-medical factors which might influence initiation and discontinuation are understudied. Therefore, we investigated how different sociodemographic factors and comorbidities were associated with the initiation and discontinuation of ADHD medication use among young adults.

Methods and results

We conducted a population-based prospective cohort study using individually linked administrative register data, in which we included all individuals residing in Sweden, between the age of 19 and 29 who were first diagnosed with ADHD between January 2006 and December 2016 (n = 59224). ADHD medication initiation was defined as the first prescription of ADHD medication in the period from 3 months before to 6 months after the cohort entry date. Those who initiated ADHD medication were followed up for medication use until discontinuation, death/emigration, or until 2019. Logistic and Cox regression models were used to investigate the associations between sociodemographics, health-related predictors and initiation, as well as discontinuation. Overall, 48.7% of the 41399 individuals initiated ADHD medication, most often methylphenidate (87%). Among the initiators, 15462 (77%) discontinued medication use during the follow-up (median time: 150 days). After mutually adjusting all other predictors, initiation was positively associated with older age, male sex, higher level of education, and negatively associated with living at home with parents, immigrant status, being unemployed during the year before inclusion, being on disability pension, having autism, substance use, schizophrenia-spectrum disorders, other mental disability/developmental disorders, cardiovascular diseases or previous accidents. Discontinuation was positively associated with being born abroad, living in big cities, being unemployed during the year before inclusion, having cancer, and negatively associated with a higher educational level, having depression, anxiety or stress-related disorder, autism spectrum disorder or diabetes.

Conclusion

Besides medical factors, sociodemographics, such as educational attainment and immigrant status might also play a role in the initiation and discontinuation of ADHD medication use among young adults newly diagnosed with ADHD.

Sustainable Earnings among Immigrants, and the Role of Health Status for Self-Sufficiency: A 10-Year Follow-Up Study of Labour Immigrants and Refugees to Sweden 2000-2006

This study aimed to investigate economic self-sufficiency for immigrants, and how health status affected self-sufficiency. The proportion of self-sufficiency during years 1-10 after receiving a residence permit is presented for all non-European labour immigrants (n = 1259) and refugees (n = 23,859), aged 18-54, who immigrated to Sweden 2000-2006, and compared to a control group of Swedish-born (n = 144,745). The risk of not being self-sufficient in year 10 was analysed with Cox regression models, and the results are presented as hazard ratios (HRs) with 95% confidence intervals (CIs). Moreover, the impact on the self-sufficiency of having a diagnosis from specialised health care during the first five years in Sweden was analysed. The results showed that half of the refugees and three-quarters of the labour immigrants were self-sufficient 10 years after residency. The adjusted risk of not being self-sufficient at year 10 was 80% higher among labour immigrants (HR = 1.8; CI = 1.6-2.0) and more than two-fold among refugees (HR = 2.7; CI = 2.6-2.8) compared to the Swedish-born. Having a diagnosis from specialised health care during the first five years in Sweden had an impact on self-sufficiency in all groups; however, the impact of having a diagnosis did not differ between refugees and Swedish-born. Measures must be taken to increase immigrants' work participation.

Overqualification at work and risk of hospitalization for psychiatric and somatic diseases among immigrants in Sweden - a prospective register-based study

OBJECTIVES

This study aimed to (i) describe the prevalence of overqualification at work among immigrants in Sweden and (ii) analyze any association between overqualification and the risk of hospitalization for somatic and psychiatric disease among refugees and labor immigrants.

METHODS

We performed a prospective register study in a cohort of 120 339 adults who immigrated to Sweden in 1991-2005 and were employed in 2006. Education-occupation status was defined as the combination of an individual's highest level of education and their occupation skill level. Individuals were followed from 2007 to 2016 with regard to hospitalization for a psychiatric, cardiovascular, respiratory or musculoskeletal disease or diabetes. Hazard ratios (HR) with 95% confidence intervals (CI) were calculated in a multivariate Cox regression analysis adjusted for age, gender, reason for residence and duration of residence.

RESULTS

The overall prevalence of overqualification among immigrants with an academic education was 39%. Overqualified individuals had an increased risk of hospitalization for any disease (HR 1.33, 95% CI 1.21-1.46) compared to "job-matched with an academic education". However, the risk estimates were lower than that of "job-matched with no academic education" (HR 1.56, 1.46-1.68). The increased risk of hospitalization for a psychiatric disease of overqualified individuals did not differ from that of job-matched with no academic education.

CONCLUSION

Our study showed that being overqualified was associated with poorer health outcomes than job-matched individuals with an academic education. Considering the high prevalence of overqualification in immigrants, this constitutes a concern, for both society and individuals.

Childhood adversity and risk of later labor market marginalization in young employees in Sweden

Background

The present study examined the independent and combined effects of childhood adversity (CA) and occupational class on the risk of future labor market marginalization (LMM) in young employees in Sweden. Occupational class (non-manual/manual workers) was also explored as a potential mediator.

Methods

This population-based longitudinal cohort study included 556,793 employees, 19-29 years, residing in Sweden in 2009. CAs included parental death, parental mental and somatic disorders, parental separation, household public assistance, single-parent household and residential instability. Measures of LMM included long-term unemployment (LTU), long-term sickness absence (LTSA) and disability pension (DP). Estimates of risk of each LMM measure, between 2010 and 2016 were calculated as Hazard Ratios (HR) with 95% confidence intervals (CI), using a Cox regression analysis.

Results

Those exposed to CA had an elevated risk for all measures of LMM. Manual workers with a history of household public assistance had the highest risk estimates compared to non-manual workers with no CAs (adjusted HR spanning from 1.59 (LTSA) to 2.50 (LTU). Regardless of occupational class, the risk of LMM grew higher with increasing number of CAs (e.g. adjusted HR of LMM in manual workers with 3+ CAs: 1.87, 95% CI: 1.81-1.94). These patterns persisted after adjustments for a range of confounders, including psychiatric and somatic morbidity. Last, we found a small but significant mediating effect of occupational class in the association between CA and LMM.

Conclusions

Information on CAs are important determinants of LMM in young adults, and especially in manual workers.

Key messages

• Those exposed to childhood adversity had an elevated risk of labor market marginalization, in terms of long-term unemployment, long-term sickness absence and disability pension.

• Information on childhood adversity is an important determinant of labor market marginalization in young adults, and especially in manual workers.

Time period effects in work disability due to common mental disorders among young employees

Background

Previous research on period effects in risk for work disability due to common mental disorders across employment sectors and occupational classes in young employees is lacking. Temporal changes in the healthcare system or social insurance policies or other structural/organisational changes could contribute to such time period effects. We aimed to investigate time period effects in the risk of work disability, defined as long-term sickness absence (LTSA) and disability pension (DP) due to common mental disorders (CMDs), among young employees according to their employment sector (private/public) and occupational class (non-manual/manual).

Methods

Three cohorts, including all employed individuals with complete information on employment sector and occupational class, aged 19-29 years and resident in Sweden on the 31-Dec-2004, 2009 and 2014 (n = 573,516, 665,138 and 600,889 individuals in cohort 2004, 2009 and 2014, respectively) were followed for four years. Crude and multivariate-adjusted hazard ratios (HRs and aHRs, respectively) with 95% confidence intervals (CIs) were estimated regarding the risk of LTSA and DP due to CMDs using Cox regression analyses.

Results

In cohort 2004, public sector employees had a higher relative risk for LTSA due to CMDs than private sector employees (aHR, (95%CI): 1.24, 1.16-1.34 and 1.18, 1.11-1.26 among non-manual and manual workers). These associations were similar in the later cohorts. Compared to cohort 2004, the rate of DP due to CMDs was considerably lower in the later cohorts leading to uncertainties in the risk estimates limiting the comparability for time period effects regarding the risk of DP due to CMDs across employment sectors and occupational classes.

Conclusions

Stricter regulation changes regarding the receipt of DP in Sweden, rather than other time period events, may have differentially affected the risk of work disability among young non-manual and manual employees working in the private and public sectors.

Key messages

Occupational Branch and Labor Market Marginalization among Young Employees with Adult Onset of Attention Deficit Hyperactivity Disorder-A Population-Based Matched Cohort Study

We compared labor market marginalization (LMM), conceptualized as days of unemployment, sickness absence and disability pension, across occupational branches (manufacturing, construction, trade, finance, health and social care, and education), among young employees with or without attention deficit hyperactivity disorder (ADHD) and examined whether sociodemographic and health-related factors explain these associations. All Swedish residents aged 19–29 years and employed between 1 January 2005 and 31 December 2011 were eligible. Individuals with a first ADHD diagnosis (n = 6030) were matched with ten controls and followed for five years. Zero-inflated negative binomial regression was used to model days of LMM with adjustments for sociodemographic and health-related factors. In total, 20% of those with ADHD and 59% of those without had no days of LMM during the follow-up. The median of those with LMM days with and without ADHD was 312 and 98 days. Having an ADHD diagnosis was associated with a higher incidence of LMM days (incident rate ratios (IRRs) 2.7–3.1) with no differences across occupational branches. Adjustments for sociodemographic and health-related factors explained most of the differences (IRRs: 1.4–1.7). In conclusion, young, employed adults with ADHD had a higher incidence of LMM days than those without, but there were no substantial differences between branches, even after adjusting for sociodemographic and health-related factors.

Does country of resettlement influence the risk of suicide in refugees? A case-control study in Sweden and Norway

Introduction

Little is known regarding how the risk of suicide in refugees relates to their host country. Specifically, to what extent, inter-country differences in structural factors between the host countries may explain the association between refugee status and subsequent suicide is lacking in previous literature.

Objectives

We aimed to investigate the risk of suicide among refugees in Sweden and Norway according to their sex, age, region/country of birth and duration of residence.

Methods

Each suicide case between the age of 18-64 years during 1998 and 2018 (17,572 and 9,443 cases in Sweden and Norway, respectively) was matched with up to 20 population-based controls, by sex and age. Multivariate-adjusted conditional logistic regression models yielding adjusted odds ratios (aORs) with 95% confidence intervals (95% CI) were used to test the association between refugee status and suicide.

Results

The aORs for suicide in refugees in Sweden and Norway were 0.5 (95% CI: 0.5-0.6) and 0.3 (95% CI: 0.3-0.4), compared with the Swedish-born and Norwegian-born individuals, respectively. Stratification by region/country of birth showed similar statistically significant lower odds for most refugee groups in both host countries except for refugees from Eritrea (aOR 1.0, 95% CI: 0.7-1.6) in Sweden. The risk of suicide did not vary much across refugee groups by their duration of residence, sex and age.

Conclusions

The findings of almost similar suicide mortality advantages among refugees in two host countries may suggest that resiliency and culture/religion-bound attitudes could be more influential for suicide risk among refugees than other post-migration environmental and structural factors in the host country.

Disclosure

No significant relationships.

Mental and somatic disorders and the subsequent risk of all-cause and cause-specific mortality in refugees, non-refugee migrants and the Swedish-born youth: a population-based cohort study in Sweden

OBJECTIVES

The aims were to investigate the associations between specific mental and somatic disorders and subsequent all-cause and cause-specific mortality (suicide, external and other causes) in young refugees and non-refugee migrants compared with Swedish-born individuals of similar age.

METHODS

In this register-based prospective cohort study, all 1 003 760 individuals (40 305 refugees, 31 687 non-refugee migrants as the exposure groups and the rest as the Swedish-born comparison group), 16-25 years old, residing in Sweden on 31 December 2004 were included. These individuals were followed regarding the outcome of all-cause and cause-specific mortality (suicide and external causes) between 2005 and 2016. The study population was also stratified according to any use of specialised healthcare for mental or somatic diagnoses before baseline (2000-2004). Cox regression models yielding crude and multivariate Hazard Ratios (HR and aHR, respectively) with 95% Confidence Intervals (CI) were used to investigate the afore-mentioned associations.

RESULTS

A lower proportion of both refugees (12%) and non-refugee migrants (10%) had college/university education compared with the Swedish-born individuals (17%). The proportion of unemployed (>180 days) among refugees (2.3%) and non-refugees (2.9%) was higher than the Swedish born (1.4%). Refugees and non-refugee migrants had about a 20% lower risk of all-cause mortality and external causes of mortality compared with Swedish-born individuals. An even greater reduction in suicide risk (aHR 0.51, 95% CI 0.37 to 0.70, and 0.63, 95% CI 0.49 to 0.82 for non-refugees and refugees, respectively) was found. When restricted to those with a mental or somatic disorder, a lower risk of both general and specific mortality was also found among both refugees and non-refugee migrants compared with Swedish-born individuals. Refugees had, however, equal point estimates of all-cause mortality associated with substance misuse disorder and neoplasms as their Swedish-born peers with these disorders.

CONCLUSIONS

With few exceptions, young migrants with specific mental and somatic disorders have a mortality advantage compared with their Swedish-born peers with the same disorders. Further research on protective factors is warranted.

Differences in psychiatric care utilization between refugees, non-refugee migrants and Swedish-born youth

BACKGROUND

The study aimed to examine differences in, and characteristics of psychiatric care utilization in young refugees who came to Sweden as unaccompanied or accompanied minors, compared with that of their non-refugee immigrant and Swedish-born peers.

METHODS

This register-linkage cohort study included 746 688 individuals between 19 and 25 years of age in 2009, whereof 32 481 were refugees (2896 unaccompanied and 29 585 accompanied) and 32 151 non-refugee immigrants. Crude and multivariate Cox regression models yielding hazard ratios (HR) and 95% confidence intervals (CI) were conducted to investigate subsequent psychiatric care utilization for specific disorders, duration of residence and age at migration.

RESULTS

The adjusted HRs for psychiatric care utilization due to any mental disorder was significantly lower in both non-refugee and refugee immigrants when compared to Swedish-born [aHR: 0.78 (95% CI 0.76-0.81) and 0.75 (95% CI 0.72-0.77, respectively)]. Within the refugee group, unaccompanied had slightly lower adjusted risk estimates than accompanied. This pattern was similar for all specific mental disorders except for higher rates in schizophrenia, reaction to severe stress/adjustment disorders and post-traumatic stress disorder. Psychiatric health care utilization was also higher in immigrants with more than 10 years of residency in Sweden entering the country being younger than 6 years of age.

CONCLUSIONS

For most mental disorders, psychiatric health care utilization in young refugees and non-refugee immigrants was lower than in their Swedish-born peers; exceptions are schizophrenia and stress-related disorders. Arrival in Sweden before the age of 6 years was associated with higher rates of overall psychiatric care utilization.

Clustering of social disadvantage with attention-deficit/hyperactivity disorder in young adults: A register-based study in Sweden

The clustering of social disadvantage with attention‐deficit/hyperactivity disorder (ADHD) in young adulthood is not well understood. We examined the clustering of ADHD with low educational attainment and unemployment in young adulthood; whether such clustering is stronger when unemployment is prolonged; and whether further clustering of disability pensioning, low education and unemployment occurs among those with ADHD. Data were obtained from Swedish health, demographic and social security registers from which 8,990 individuals with recorded ADHD diagnoses at the age of 10–35 and their 44,387 matched referents without mental disorders. Social disadvantage was measured using data on educational attainment, unemployment and disability pension from the diagnosis year or age 19 if diagnosed at younger age. Clustering was examined by comparing observed and expected occurrence (O/E ratio) of all possible combinations of ADHD, low education and unemployment, and, among those with ADHD, additional combinations with new‐onset disability pension. The likelihood of having neither ADHD, low education nor unemployment was increased (O/E ratio = 1.20, 95% confidence interval 1.19–1.20 at baseline; 1.18, 1.17–1.18 at follow‐up), as well as having all three characteristics (O/E ratio = 3.99, 3.89–4.10 at baseline; 5.68, 5.47–5.89 at follow‐up). This clustering was stronger among women than men and when unemployment was prolonged. The results suggest that low education and unemployment appear to cluster remarkably with ADHD among young adults, more so among women and when unemployment is prolonged.

Risk Factors for Disability Pension among Young Adults Diagnosed with Attention-deficit Hyperactivity Disorder (ADHD) in Adulthood

OBJECTIVE

To investigate risk factors of disability pension (DP) in young adults diagnosed with ADHD in Sweden.

METHOD

In total, 9718 individuals diagnosed with incident ADHD in young adult age (19-29 years) 2006 to 2011, were identified through national registers. They were followed for 5 years and Cox regression models were applied to analyze the DP risk (overall and by sex), associated with socio-demographics, work-related factors, and comorbid disorders.

RESULTS

Twenty-one percent of all received DP. Being younger at diagnosis (hazard ratio [HR] = 1.54; 95%confidence interval [CI] 1.39-1.71); low educational level (HR = 1.97; 95%CI 1.60-2.43 for <10 years); work-related factors at baseline (no income from work [HR = 2.64; 95%CI 2.35-2.98] and sickness absence >90 days [HR = 2.48; 95%CI2.17-2.83]); and schizophrenia/psychoses (HR = 2.16; 95%CI 1.66-2.80), autism (HR = 1.87; 95%CI 1.42-2.46), anxiety (HR = 1.34; 95%CI 1.22-1.49) were significantly associated with an increased risk of DP. Similar risk patterns were found in men and women.

CONCLUSION

Work-related factors and comorbid mental disorders need to be highlighted in early vocational rehabilitation for individuals with ADHD.

Persistence of antidepressant use among refugee youth with common mental disorder

BACKGROUND

The objective of this study was to investigate whether persistence of antidepressant use differs between refugee youth and Swedish-born youth after a diagnosis of a common mental disorder (CMD), and if clinical and sociodemographic factors are associated with antidepressant discontinuation.

METHODS

Youth aged 16-25 years, with an incident diagnosis of CMD (depression, post-traumatic stress disorder (PTSD), anxiety disorders) accessing specialized healthcare in Sweden 2006-2016 were included. New users were identified with a one-year washout period. Refugees (N=1575) were compared with Swedish-born youth (N=2319). Cox regression models [reported as adjusted Hazard Ratios (HRs) with 95% confidence intervals (CIs)] were used to investigate factors associated with discontinuation of antidepressant use.

RESULTS

Among youth (mean age 20.9 years, SD 2.7, 50% females), the median duration of antidepressant use differed considerably between refugee (101 days, IQR 31-243) and Swedish-born youth (252 days, IQR 101-558). Refugees were more likely to discontinue treatment (HR 1.61, 95% CI 1.47-1.77). Factors associated with an increased risk for discontinuation in refugees included ≤5 years duration of formal residency (HR 1.28, 95% CI 1.12-1.45), antidepressant type, and dispensing lag (time from prescription to dispensing) of >7 days (1.43, 1.25-1.64), whereas PTSD (0.78, 0.64-0.97) and anxiolytic use (0.79, 0.64-0.96) were associated with a lower discontinuation risk.

LIMITATIONS

Only persons treated in specialized healthcare could be included.

CONCLUSION

The relatively short treatment durations among refugee youth suggest that antidepressant treatment may not be optimal in CMD, and better monitoring of treatment as well as transcultural education of healthcare personnel are warranted.

Trajectories of labour market marginalisation among young adults with newly diagnosed attention-deficit/hyperactivity disorder (ADHD)

AIMS

Labour market marginalisation (LMM), i.e. severe problems in finding and keeping a job, is common among young adults with attention-deficit/hyperactivity disorder (ADHD). This study aimed to disentangle the extent of LMM as well as the heterogeneity in patterns of LMM among young adults with ADHD and what characterises those belonging to these distinct trajectories of LMM.

METHODS

This population-based register study investigated all 6287 young adults, aged 22-29 years, who had their first primary or secondary diagnosis of ADHD in Sweden between 2006 and 2011. Group-based trajectory (GBT) models were used to estimate trajectories of LMM, conceptualised as both unemployment and work disability, 3 years before and 5 years after the year of an incident diagnosis of ADHD. Odds ratios (ORs) with 95% confidence intervals (CIs) for the association between individual characteristics and the trajectory groups of LMM were estimated by multinomial logistic regression.

RESULTS

Six distinct trajectories of LMM were found: 'increasing high' (21% belonged to this trajectory group) with high levels of LMM throughout the study period, 'rapidly increasing' (19%), 'moderately increasing' (21%), 'constant low' (12%) with low levels of LMM throughout the study period, 'moderately decreasing' (14%) and finally 'fluctuating' (13%), following a reversed u-shaped curve. Individuals with the following characteristics had an increased probability of belonging to trajectory groups of increasing LMM: low educational level (moderately increasing: OR: 1.4; CI: 1.2-1.8, rapidly increasing: OR: 1.7; CI: 1.3-2.1, increasing high: OR: 2.9; CI: 2.3-3.6), single parents (moderately increasing: OR: 1.6; CI: 1.1-2.4, rapidly increasing: OR: 2.0; CI: 1.3-3.0), those born outside the European Union/the Nordic countries (rapidly increasing: OR: 1.7; CI: 1.1-2.5, increasing high: OR: 2.1; CI: 1.4-3.1), persons living in small cities/villages (moderately increasing: OR: 2.4; CI: 1.9-3.0, rapidly increasing: OR: 2.1; CI: 1.6-2.7, increasing high: OR: 2.6; CI: 2.0-3.3) and those with comorbid mental disorders, most pronounced regarding schizophrenia/psychoses (rapidly increasing: OR: 6.7; CI: 2.9-19.5, increasing high: OR: 12.8; CI: 5.5-37.0), autism spectrum disorders (rapidly increasing: OR: 4.6; CI: 3.1-7.1, increasing high: OR: 9.6; CI: 6.5-14.6), anxiety/stress-related disorders (moderately increasing: OR: 1.3; CI: 1.1-1.7, rapidly increasing: OR: 2.0; CI: 1.6-2.5, increasing high: OR: 1.8; CI: 1.5-2.3) and depression/bipolar disorder (moderately increasing: OR: 1.3; CI: 1.0-1.6, rapidly increasing: OR: 1.7; CI: 1.4-2.2, increasing high: OR: 1.5; CI: 1.2-1.9).

CONCLUSIONS

About 61% of young adults were characterised by increasing LMM after a diagnosis of ADHD. To avoid marginalisation, attention should especially be given to young adults diagnosed with ADHD with a low educational level, that are single parents and who are living outside big cities. Also, young adults with comorbid mental disorders should be monitored for LMM early in working life.

The changing nature of work - Job strain, job support and sickness absence among care workers and in other occupations in Sweden 1991-2013

This study examined exposure changes in three psychosocial dimensions - job demands, job control, and social support - and the associations between these dimensions and sickness absence throughout the period 1991-2013. The analyses covered periods of economic ups and downs in Sweden and periods involving major fluctuations in sickness absence. Data on care workers (n = 16,179) and a comparison group of employees in other occupations (n = 82,070) were derived from the biennial Swedish Work Environment Survey and linked to register data on sickness absence. Eight exposure profiles, based on combinations of demands, control, and support, were formed. The proportion of individuals with work profiles involving high demands doubled among care workers (14%-29%) while increasing modestly in the comparison group (17%-21%) 1991-2013. The work profile that isolated high-strain (iso-strain), i.e., high demands, low control, and low social support, was more prevalent among care workers, from 4% in 1991 to 11% in 2013. Individuals with work profiles involving high-demand jobs had the highest number of days on sickness absence during the study period and those with the iso-strain work profile had the highest increase in sickness absence, from 15 days per year during 1993-1994, to 42 days during 2000-2002. Employees with a passive work profile (low job demands and low job control) had the lowest rate and the lowest increase in sickness absence. Individuals with active work profiles, where high demands are supposed to be balanced by high job control, had a rather high increase in sickness days around 2000. A conclusion is that there is a long-term trend towards jobs with high demands. This trend is stronger among care workers than among other occupations. These levels of job demands seem to be at such a level that it is difficult to compensate for with higher job control and social support.

Occupational class and employment sector differences in common mental disorders: a longitudinal Swedish cohort study

BACKGROUND

Recent increases in common mental disorders (CMDs) among young adults are of great concern although studies of CMDs in young employees are sparse. This study investigated the independent and interacting effects of sector of employment, occupational class and CMDs. Additionally, associations between type of employment branch and CMDs within each sector were examined.

METHODS

This population-based longitudinal cohort study included 665 138 employees, 19-29 years, residing in Sweden in 2009. Employment sector (i.e. private/public) and occupational class (non-manual/manual workers) were measured in 2009. Risk estimates of CMDs, measured as new prescription of antidepressants and/or psychiatric care with a diagnosis of CMDs, between 2010 and 2016, were calculated as hazard ratios (HRs) with 95% confidence intervals (CIs), using Cox multivariable regression analysis.

RESULTS

Public sector employees (whereof 60% manual workers) had an elevated risk for CMDs compared to private sector employees [adjusted HR: 1.14 (95% CI 1.12-1.16)]. Within each sector, manual workers were at increased risk of CMDs compared to non-manual workers. There was an interaction between sector of employment and occupational class; manual workers in the public sector had the highest CMD risk [adjusted synergy index: 1.51 (95% CI 1.29-1.76)]. The most elevated risk for CMDs was observed in those employed in health and social services and the lowest risk among construction workers.

CONCLUSION

Sector of employment and occupational class play a role in CMDs in young employees. These findings should be taken into account in the attempts to reduce CMDs in the young working population.

Country of birth, time period of resettlement and subsequent treated common mental disorders in young refugees in Sweden

BACKGROUND

Little is known regarding treatment for common mental disorders (CMDs) in young refugees. We aimed to identify (i) if the risk of treatment for CMDs in young refugees varies by their country of birth, compared with the Swedish-born population and (ii) if time period of resettlement influences these possible associations.

METHODS

All Swedish-born individuals and people who were granted refugee status, aged 16-25 years, living in Sweden on 31 December 1999, 2004 or 2009 (around 1 million people with 3-4% refugees in each cohort), were followed for 4 years for treated CMDs by linking register data. To facilitate stratified analyses by refugees' country of birth, the 2009 cohort was followed for 7 years with regard to specialized healthcare and antidepressant prescription due to CMDs. Hazard ratios with 95% confidence intervals were computed in crude and adjusted models.

RESULTS

Refugees in the 2009 cohort with 7-year follow-up had a 25% lower risk for treated CMDs, compared with the Swedish-born. Stratified analysis by country of birth showed a similarly lower risk regarding treated CMDs among refugees from all countries but Iran [hazard ratios (95% confidence intervals): 1.15 (1.05-1.26)] than their Swedish-born peers. No substantial effect of time period of resettlement was observed in the risk for treated CMDs in refugees.

CONCLUSIONS

Treatment for CMDs is lower in young refugees than in the majority population in Sweden, is stable across time, but varies with country of birth. Strategies to improve access to mental healthcare for young refugees are warranted.

Favorable Working Conditions Related to Health Behavior Among Nurses and Care Assistants in Sweden-A Population-Based Cohort Study

Objective: To analyze the associations between favorable physical and psychosocial work factors and health behavior among healthcare employees (nurses and care assistants) with health complaints.

Methods: The study was based on seven iterations (2001–2013) of a biennial Swedish work environment survey linked with data from public registers. In all, 7,180 healthcare employees, aged 16–64 years, who had reported health complaints, were included. Health behavior was operationalized through four combinations of sickness absence (SA) and sickness presence (SP): ‘good health behavior' (Low SP/Low SA), ‘recovery behavior' (Low SP/High SA), ‘risk behavior' (High SP/Low SA), and ‘poor health behavior' (High SP/High SA). Odds ratios (OR) were calculated by multinomial logistic regression with 95% confidence intervals (CI).

Results: After adjusting for socio-demographic factors, those who rarely worked in strenuous postures had an increased probability of having ‘good health behavior' (OR range: nurses 1.72–2.02; care assistants 1.46–1.75). Those who rarely experienced high job demands had increased odds for having ‘good health behavior' (OR: nurses 1.81; OR range: care assistants 1.67–2.13), while having good job control was found to be related to ‘good health behavior' only among care assistants (OR range 1.30–1.68). In the full model, after also considering differences in health, none of the work environment indicators affected ‘good health behavior' among nursing professionals. Among care assistants, rarely having heavy physical work and having low psychosocial demands remained significantly associated with ‘good health behavior' (OR range: 1.24–1.58) and ‘recovery behavior' (OR range: 1.33–1.70). No associations were found between favorable work environment factors and ‘risk behavior' among the two groups of employees. However, positive assessments of the work situation were associated with ‘good health behavior,' even after controlling for all confounders for both groups (OR range: 1.43–2.69).

Conclusions: ‘Good health behavior' and ‘recovery behavior' among care assistants were associated with favorable physical and psychosocial working conditions even when health was considered. This implies that reduced sickness presence and sickness absence among care assistants can be achieved through improved physical and psychosocial working conditions.

Childhood adversity and common mental disorders in young employees in Sweden: is the association affected by early adulthood occupational class?

BACKGROUND

Childhood adversities are associated with an elevated risk for common mental disorders (CMDs). Whether the strength of the association also holds for young employees is unclear. Given the increase in CMD rates in young adults over the past decade, identification of risk factors has important implications for future public health interventions. The current study aimed to investigate the effects of childhood adversities on CMDs. Additionally, the role of occupational class (non-manual/manual workers) in the relationship was examined.

METHODS

This population-based longitudinal cohort study included 544,003 employees, 19-29 years, residing in Sweden in 2009. Adversities included parental death, parental mental and somatic disorders, parental separation or single-parent household, household public assistance and residential instability. Estimates of risk of CMDs, measured as prescription of antidepressants and/or psychiatric care with a clinical diagnosis of CMDs, between 2010 and 2016 were calculated as relative risks (RR) with 95% confidence intervals (CI), using a modified Poisson regression analysis. Occupational class (non-manual/manual workers) was explored as a potential moderator.

RESULTS

In both manual and non-manual workers, childhood adversities were associated with an elevated risk of subsequent CMDs. The risk was moderated by occupational class, i.e., especially pronounced risk was found in manual workers who had experienced cumulative adversity (adjusted RR 1.76, 95% CI 1.70-1.83) when compared to non-manual workers with no adversity. Among the adversities examined, having had a parent treated for a mental disorder, having grown up in a household living on public assistance or having experienced residential instability were the strongest predictors of CMDs.

CONCLUSION

Our findings suggest that, among young employees, manual workers with a history of multiple childhood adversities are especially vulnerable to subsequent CMDs.

Disability pension and mortality in individuals with specific somatic and mental disorders: examining differences between refugees and Swedish-born individuals

Background

More than half a million refugees have arrived to Sweden during the last decade. The aim was to investigate differences between refugees and Swedish-born individuals regarding different specific somatic and mental disorders, and subsequent disability pension and mortality.

Methods

All refugees (n=239 742) and Swedish-born individuals (n=4 133 898), aged 19–60 years, resident in Sweden on 31st of December in 2009 were included in this population-based prospective cohort study. Data from six nationwide Swedish registers were linked by the unique anonymised identification number. HRs with 95% CIs were computed for disability pension and mortality 2010–2013 by Cox regression models.

Results

Compared with their Swedish-born counterparts with mental or somatic diagnoses, refugees with these diagnoses had a higher risk of subsequent disability pension and a lower risk of mortality. Highest estimates for disability pension were seen for refugees with neoplasm (HR: 1.72; 95% CI: 1.56 to 1.91), musculoskeletal disorders (HR: 1.57; 95% CI: 1.47 to 1.67), diseases of the circulatory system (HR: 1.33; 95% CI: 1.22 to 1.45), depressive disorders (HR: 1.31; 95% CI: 1.21 to 1.41) and diabetes mellitus (HR: 1.30; 95% CI: 1.15 to 1.47). The risk of mortality was lowest for refugees with regard to bipolar disorders (HR: 0.37; 95% CI: 0.16 to 0.82), post-traumatic stress disorder (HR: 0.37; 95% CI: 0.25 to 0.54) and least pronounced in regard to neoplasm (HR: 0.69; 95% CI: 0.61 to 0.77) compared with Swedish-born with similar disorders.

Conclusion

Refugees have a generally higher risk of disability pension compared with Swedish-born with specific somatic and mental disorders. Despite this, refugees with all specific disorders have lower risk estimates of mortality, probably due to a healthy selection. The higher risk of disability pension might therefore be due to other causes besides poor health.

Healthcare use before and after suicide attempt in refugees and Swedish-born individuals

PURPOSE

There is a lack of research on whether healthcare use before and after a suicide attempt differs between refugees and the host population. We aimed to investigate if the patterns of specialised (inpatient and specialised outpatient) psychiatric and somatic healthcare use, 3 years before and after a suicide attempt, differ between refugees and the Swedish-born individuals in Sweden. Additionally, we aimed to explore if specialised healthcare use differed among refugee suicide attempters according to their sex, age, education or receipt of disability pension.

METHODS

All refugees and Swedish-born individuals, 20-64 years of age, treated for suicide attempt in specialised healthcare during 2004-2013 (n = 85,771 suicide attempters, of which 4.5% refugees) were followed 3 years before and after (Y - 3 to Y + 3) the index suicide attempt (t0) regarding their specialised healthcare use. Annual adjusted prevalence with 95% confidence intervals (CIs) of specialised healthcare use were assessed by generalized estimating equations (GEE). Additionally, in analyses among the refugees, GEE models were stratified by sex, age, educational level and disability pension.

RESULTS

Compared to Swedish-born, refugees had lower prevalence rates of psychiatric and somatic healthcare use during the observation period. During Y + 1, 25% (95% CI 23-28%) refugees and 30% (95% CI 29-30%) Swedish-born used inpatient psychiatric healthcare. Among refugees, a higher specialised healthcare use was observed in disability pension recipients than non-recipients.

CONCLUSION

Refugees used less specialised healthcare, before and after a suicide attempt, relative to the Swedish-born. Strengthened cultural competence among healthcare professionals and better health literacy among the refugees may improve healthcare access in refugees.

Suicide attempt and suicide in refugees in Sweden - a nationwide population-based cohort study

BACKGROUND

Despite a reported high rate of mental disorders in refugees, scientific knowledge on their risk of suicide attempt and suicide is scarce. We aimed to investigate (1) the risk of suicide attempt and suicide in refugees in Sweden, according to their country of birth, compared with Swedish-born individuals and (2) to what extent time period effects, socio-demographics, labour market marginalisation (LMM) and morbidity explain these associations.

METHODS

Three cohorts comprising the entire population of Sweden, 16-64 years at 31 December 1999, 2004 and 2009 (around 5 million each, of which 3.3-5.0% refugees), were followed for 4 years each through register linkage. Additionally, the 2004 cohort was followed for 9 years, to allow analyses by refugees' country of birth. Crude and multivariate hazard ratios (HRs) with 95% confidence intervals (CIs) were computed. The multivariate models were adjusted for socio-demographic, LMM and morbidity factors.

RESULTS

In multivariate analyses, HRs regarding suicide attempt and suicide in refugees, compared with Swedish-born, ranged from 0.38-1.25 and 0.16-1.20 according to country of birth, respectively. Results were either non-significant or showed lower risks for refugees. Exceptions were refugees from Iran (HR 1.25; 95% CI 1.14-1.41) for suicide attempt. The risk for suicide attempt in refugees compared with the Swedish-born diminished slightly across time periods.

CONCLUSIONS

Refugees seem to be protected from suicide attempt and suicide relative to Swedish-born, which calls for more studies to disentangle underlying risk and protective factors.

Initiation of antidepressant use among refugee and Swedish-born youth after diagnosis of a common mental disorder: findings from the REMAIN study

PURPOSE

The objective of this study was to compare the initiation and type of antidepressant use between refugees and matched Swedish-born youth after a diagnosis of a common mental disorder (CMD) and assess sociodemographic and clinical factors associated with the initiation.

METHODS

The study cohort included youth aged 16-25 years, with an incident diagnosis of CMD based on specialized health care registers in Sweden 2006-2016, without prior antidepressant use during 1 year. One Swedish-born person was matched for each identified refugee youth (N = 3936 in both groups). Initiation of antidepressant use and factors associated with the initiation, were investigated with logistic regression yielding Odds ratios, OR, and 95% Confidence Intervals, CI.

RESULTS

Refugees were less likely to initiate antidepressant use compared with Swedish-born (40.5% vs. 59.6%, adjusted OR 0.43, 95% CI 0.39-0.48). Selective serotonin reuptake inhibitors (SSRIs) were less frequently initiated for refugees than Swedish-born (71.2% vs. 81.3% of initiations, p < 0.0001). Sertraline was the most commonly initiated antidepressant both for refugees (34.3%) and Swedish-born individuals (40.3%). Among refugees, factors associated with increased odds of antidepressant initiation were previous use of anxiolytics or hypnotics, previous sickness absence of < 90 days, cancer and older age (OR range 1.07-2.72), and less than 5 years duration of residency in Sweden was associated with decreased odds (OR 0.76, 95% CI 0.63-0.92).

CONCLUSION

Young refugees with a CMD seem to initiate antidepressants in general and those most effective considerably less often than their Swedish-born counterparts.

Mental disorders, suicide attempt and suicide: differences in the association in refugees compared with Swedish-born individuals

BACKGROUND

Mental disorders are associated with an elevated risk for suicide attempt and suicide. Whether the strength of the associations also holds for refugees is unclear.

AIMS

To examine the relationship between specific mental disorders and suicide attempt and suicide in refugees and Swedish-born individuals.

METHOD

This longitudinal cohort study included 5 083 447 individuals aged 16-64 years, residing in Sweden in 2004, where 196 757 were refugees. Mental disorders were defined as having a diagnosis in psychiatric care during 2000-2004. Estimates of risk of suicide attempt and suicide were calculated as hazard ratios with 95% confidence intervals. Adjustments were made for important confounding factors, including history of attempt. The reference group comprised Swedish-born individuals without mental disorders.

RESULTS

Rates for suicide attempt in individuals with a mental disorder were lower in refugees compared with Swedish-born individuals (480 v. 850 per 100 000 person-years, respectively). This pattern was true for most specific disorders: compared with the reference group, among refugees, multivariable-adjusted hazard ratios for suicide attempt ranged from 3.0 (anxiety) to 7.4 (substance misuse), and among Swedish-born individuals, from 4.9 (stress-related disorder) to 9.3 (substance misuse). For schizophrenia, bipolar disorder and personality disorder, estimates for suicide attempt were comparable between refugees and Swedish-born individuals. Similar patterns were seen for suicide.

CONCLUSIONS

For most mental disorders, refugees were less likely to be admitted to hospital for suicide attempt or die by suicide compared with Swedish-born individuals. Further research on risk and protective factors for suicide attempt and suicide among refugees with mental disorders is warranted.

DECLARATION OF INTEREST

None.

Trajectories of sickness absence, disability pension and unemployment in young immigrants with common mental disorders

BACKGROUND

The aims were to elucidate if trajectories of labour market marginalization (LMM), measured as sickness absence (SA)/disability pension (DP) or unemployment, differed between young immigrants and natives before and after an incident diagnosis of a common mental disorder (CMD), and to investigate if educational level, psychiatric comorbidity and duration of residence in Sweden (in immigrants) had different associations with subsequent LMM in natives compared with immigrants.

METHODS

A total of 28 971 young adults (19-30 years), with an incident CMD (inpatient or specialized outpatient healthcare due to CMDs or dispensed prescribed antidepressants during 2007) were included. Group-based trajectory models were utilized to identify trajectories of annual months of LMM 3 years before and 6 years after the diagnosis. The associations of risk factors with different trajectories were investigated by multinomial logistic regression, χ2-test and Nagelkerke R2 to measure the associations' strength. Immigrants were categorized into Western and non-Western immigrants.

RESULTS

Young natives and immigrants showed similar trajectories of SA/DP. A higher proportion of non-Western immigrants (20.5%) followed trajectories of high levels of unemployment (>2 annual months) compared with Western immigrants (15%) and natives (16.5%). Educational level and duration of residence in Sweden (in immigrants) discriminated trajectories of both SA/DP and unemployment, whereas psychiatric comorbidity only discriminated trajectories of SA/DP.

CONCLUSIONS

Differences in trajectories of unemployment between young natives and immigrants with an incident CMD were found. Educational level and psychiatric comorbidity provided information on differences between natives and immigrants and duration of residence gave information for subgroups of immigrants.

Interaction Effects of Physical and Psychosocial Working Conditions on Risk for Sickness Absence: A Prospective Study of Nurses and Care Assistants in Sweden

Employees in health and social care are often simultaneously exposed to both physical and psychosocial challenges that may increase their risk for sickness absence. The study examines interaction effects of physical and psychosocial work conditions on the future risk for sickness absence among nurses and care assistants in Sweden. The study was based on 14,372 participants in any of the Swedish Work Environment Surveys conducted during the years 1993–2013 with linked register information on background factors and compensated sickness absence. Adjusted hazard ratio (HR), stratified by occupation, and measures of additive interaction effects were estimated. The combinations of high psychosocial job demands and heavy physical work and strenuous postures, respectively, significantly increased the risks for sickness absence among nurses (HR 1.43; CI 1.09–1.88 and HR 1.42; CI 1.16–1.74, respectively), as well as among care assistants (HR 1.51; CI 1.36–1.67 and HR 1.49; CI 1.36–1.63, respectively). The combinations of low job control and both heavy physical work (HR 1.44; CI 1.30–1.60) and strenuous postures (HR 1.42; CI 1.30–1.56) were also associated with excess risk for sickness absence among care assistants. We also found interaction effects among care assistants but not among nurses. The results indicate that the high sickness absence rate among care workers in Sweden can be reduced if the simultaneous exposures of high psychosocial and high physical challenges are avoided. Management policies for reduced time pressure, improved lifting aids, and measures to avoid awkward work postures are recommended. For care assistants, increased influence over work arrangements is likely to lower their sickness absence risk.

Common mental disorders in young refugees in Sweden: the role of education and duration of residency

Background

Studies investigating risks of common mental disorders (CMDs) in refugee youth are sparse. The current study examined health care use due to CMDs in unaccompanied and accompanied refugee youth and Swedish-born, and the role of education and residency duration.

Methods

This register-based, longitudinal cohort study included 743,671 individuals (whereof 33,501 refugees) between 19-25 years, residing in Sweden in 2009. Refugees were classified as unaccompanied/accompanied. Risk estimates of CMDs, measured as health care and antidepressant treatment, between 2010-2016 were calculated as adjusted hazard ratios (aHR) with 95% confidence intervals (CI). Highest attained education in 2009, and residency duration were examined as potential modifiers.

Results

Compared to Swedish-born youth, refugees had a lower risk of treated major depressive and anxiety disorders (aHR): 0.73 (95% CI 0.68-0.78) and 0.74 (95% CI 0.70-0.79) respectively), but a higher risk for posttraumatic stress disorders (PTSD). Compared to Swedish-born, unaccompanied had an 8-fold elevated risk for PTSD (aHR: 8.40, 95% CI 6.16-11.47) and accompanied refugees had a nearly 3-fold risk of PTSD (aHR: 2.78, 95% CI 2.29-3.37). Rates of PTSD decreased with years spent in Sweden. The risk of CMDs decreased with increasing education.

Conclusions

Young refugees had a lower risk of treated depressive and anxiety disorders, but a higher risk for PTSD. In refugees, the rates of anxiety disorders increased slightly over time, whereas the rates of PTSD decreased. Last, low education was an important predictor for CMDs.

Key messages

Our study highlights the need to specifically focus on stress-related mental disorders in studies on refugees as risk estimates might differ. Moreover, providing scalable low-intensity interventions to address CMDs including posttraumatic stress are an important first step in order to prevent prolonged suffering and persistence of PTSD in refugee youth.

Work environment risk factors for the duration of all cause and diagnose-specific sickness absence among healthcare workers in Sweden: a prospective study

OBJECTIVES

Increasing sickness absence (SA) has been reported among healthcare workers in Sweden. Our aim was to analyse the impact of work environment factors on short-term and long-term SA based on musculoskeletal and psychiatric diagnoses among healthcare workers.

METHODS

The study sample consisted of healthcare workers (n=12 452) drawn from representative samples of workers aged 16 to 64, who participated in the Swedish Work Environment Surveys (SWES) between 1993 and 2013. The outcomes were either short-term (≤28 days) or long-term (>104 days) SA between 1994 and 2016. HRs and 95% CIs were calculated for the impact of physical and psychosocial working conditions on risk of subsequent short-term or long-term SA for 3 years after participation in SWES.

RESULTS

Heavy physical work and strenuous work postures showed elevated HRs for short-term and long-term SA compared with those without these work exposures. Similarly, high job demands and low job control each increased the risk for both short-term and long-term SA compared with employees with low job demands and high job control. Low job support increased the risk for short-term SA compared with those with high job support. Working conditions were strongly related to short-term SA due to musculoskeletal diagnoses but not to short-term SA due to psychiatric diagnoses. None of the work characteristics, except strenuous postures, elevated the risk for long-term SA due to psychiatric diagnosis compared with employees without these characteristics.

CONCLUSIONS

Ergonomic improvements and stress reduction among healthcare workers are likely to reduce the prevalence of SA foremost due to musculoskeletal diagnoses.

Presenteeism, Psychosocial Working Conditions and Work Ability among Care Workers-A Cross-Sectional Swedish Population-Based Study

Presenteeism, attending work while ill, has been examined in different contexts in the last few decades. The aim was to examine whether poor psychosocial working conditions and perceived work ability are associated with increased odds ratios for presenteeism, focusing on nursing professionals and care assistants. A cross-sectional population-based study was conducted. The selected individuals were extracted from representative samples of employees, aged 16–64, who participated in the Swedish Work Environment Surveys between 2001 and 2013 (n = 45,098). Three dimensions of psychosocial working conditions were measured: job demands, job control, and job support. Presenteeism and perceived work ability was measured. Using multiple logistic regression analyses, odds ratios for presenteeism with 95% confidence intervals (CI) were estimated. While nurses (n = 1716) showed the same presenteeism level as all the other occupation groups (n = 37,125), it was more common among care assistants (n = 6257). The odds ratio for presenteeism among those with high job demands (OR = 2.37, 95% CI 2.21–2.53), were higher among women than among men. For nursing professionals and care assistants, the odds ratios for presenteeism were highest among those with the lowest work ability level. The problems of presenteeism and low work ability among many health and care workers may be lessened by a reduction in psychosocial demands.

Common mental disorders among young refugees in Sweden: The role of education and duration of residency

BACKGROUND

Studies investigating risks of common mental disorders (CMDs) in refugee youth are sparse. The current study examined health care use due to CMDs in unaccompanied and accompanied refugee youth and Swedish-born, and the role of education and residency duration.

METHODS

This longitudinal cohort study included 746,517 individuals (whereof 36,347 refugees) between 19 and 25 years, residing in Sweden in 2009. Refugees were classified as unaccompanied/accompanied. Risk estimates of CMDs, measured as health care use and antidepressant treatment, between 2010-2016 were calculated as adjusted hazard ratios (aHR) with 95% confidence intervals (CI). Highest attained education in 2009, and residency duration were examined as potential modifiers.

RESULTS

Compared to Swedish-born youth, refugees had a lower risk of treated major depressive and anxiety disorders (aHR): 0.67 (95% CI 0.63-0.72) and 0.67 (95% CI 0.63-0.71) respectively), but a higher risk for posttraumatic stress disorders (PTSD). Compared to Swedish-born, unaccompanied had a nearly 6-fold elevated risk for PTSD (aHR: 5.82, 95% CI 4.60-7.34) and accompanied refugees had a 3-fold risk of PTSD (aHR: 3.08, 95% CI 2.54-3.74). Rates of PTSD decreased with years spent in Sweden. The risk of CMDs decreased with increasing education.

LIMITATIONS

The study lacked information on pre-migration factors. There may further be a potential misclassification of untreated CMDs.

CONCLUSION

Refugees had a lower risk of treated depressive and anxiety disorders but a higher risk for PTSD. In refugees, the rates of anxiety disorders increased slightly over time whereas the rates of PTSD decreased. Last, low education was an important predictor for CMDs.

The role of refugee status and mental disorders regarding subsequent labour market marginalisation: a register study from Sweden

PURPOSE

This study aimed to assess the role of refugee status and specific mental disorders regarding subsequent labour market marginalisation.

METHODS

Prospective cohort study of all refugees (n = 216,930) and Swedish-borns (n = 3,841,788), aged 19-60 years, and resident in Sweden in 2009. Hazard ratios (HRs) with 95% Confidence Intervals (CIs)  for long-term unemployment (> 180 days) and disability pension (DP) were calculated with Cox regression analyses.

RESULTS

Mental disorders were more prevalent in refugees compared to Swedish-born individuals, with greatest differences seen for post-traumatic stress disorder (PTSD; refugees 1.3%; Swedish-born individuals 0.1%). Regarding long-term unemployment, refugees without a mental disorder had an adjusted HR (aHR) of 2.68 (95% CI 2.65-2.71) compared to Swedish-born individuals without mental disorders, which was above the aHR of refugees (aHR 2.33, 95% CI 2.29-2.38) and Swedish-born individuals (aHR 1.44, 95% CI 1.43-1.45) with mental disorders. Regarding DP, compared to Swedish-born individuals without mental disorders, the aHRs were 1.44 (95% CI 1.34-1.54) for refugees without, but 6.11 (95% CI 5.84-6.39) for refugees with mental disorders. Swedish-born individuals with mental disorder had an aHR of 3.96 (95% CI 3.85-4.07). With regard to specific disorders, the aHRs for refugees, as compared to Swedish-born individuals without mental disorders, were markedly increased for all disorders (e.g. PTSD: long-term unemployment aHR: 2.03 (95% CI 1.89-2.18); DP 7.07 (95% CI 6.42-7.78).

CONCLUSION

Mental disorders are more prevalent in refugees than in Swedish-born individuals but do not appear to increase their risk of long-term unemployment. Refugee status and mental disorders strongly contribute to the risk of DP, indicating that factors beyond medical considerations contribute to their granting of DP.

Sociodemographic, labour market marginalisation and medical characteristics as risk factors for reinfarction and mortality within 1 year after a first acute myocardial infarction: a register-based cohort study of a working age population in Sweden

OBJECTIVES

Research covering a wide range of risk factors related to the prognosis during the first year after an acute myocardial infarction (AMI) is insufficient. This study aimed to investigate whether sociodemographic, labour market marginalisation and medical characteristics before/at AMI were associated with subsequent reinfarction and all-cause mortality.

DESIGN

Population-based cohort study.

PARTICIPANTS

The cohort included 15 069 individuals aged 25-64 years who had a first AMI during 2008-2010.

PRIMARY AND SECONDARY OUTCOME MEASURES

The outcome measures consisted of reinfarction and all-cause mortality within 1 year following an AMI, which were estimated by univariate and multivariable HRs and 95% CIs by Cox regression.

RESULTS

Sociodemographic characteristics such as lower education showed a 1.1-fold and 1.3-fold higher risk for reinfarction and mortality, respectively. Older age was associated with a higher risk of mortality while being born in non-European countries showed a lower risk of mortality. Labour market marginalisation such as previous long-term work disability was associated with a twofold higher risk of mortality. Regarding medical characteristics, ST-elevation myocardial infarction was predictive for reinfarction (HR: 1.14, 95% CI: 1.07 to 1.21) and all-cause mortality (HR: 3.80, 95% CI: 3.08 to 4.68). Moreover, diabetes mellitus, renal insufficiency, stroke, cancer and mental disorders were associated with a higher risk of mortality (range of HRs: 1.24-2.59).

CONCLUSIONS

Sociodemographic and medical risk factors were identified as risk factors for mortality and reinfarction after AMI, including older age, immigration status, somatic and mental comorbidities. Previous long-term work disability and infarction type provide useful information for predicting adverse outcomes after AMI during the first year, particularly for mortality.

Working conditions and compensated sickness absence among nurses and care assistants in Sweden during two decades: a cross-sectional biennial survey study

OBJECTIVES

The aims of the study were to trace the patterns of work environment factors and compensated sickness absence (SA) among nurses and care assistants compared with other occupations and to compare SA among exposed and non-exposed nurses and care assistants.

DESIGN

A cross-sectional survey on work environment factors based on the biennial Swedish Work Environment Surveys 1991-2013, linked to longitudinal register data on SA 1993-2014.

PARTICIPANTS

The study included 98 249 individuals, stratified into nurses and care assistants (n=16 179) and a reference population including all other occupations (n=82 070).

OUTCOME MEASURE

Annual days of compensated SA (>14 days) 3 years after exposure years.

RESULTS

Nurses and care assistants had higher SA in 1993-2014 compared with all other occupations, and differences in background factors only partly explained this relationship. For both groups, exposure to physical work factors remained steady, but the number of exposed were 10%-30% higher among nurses and care assistants. Those exposed to heavy physical work and strenuous working postures had in most years significantly higher SA when compared with non-exposed (rate ratio range: 1.4-1.9). Exposure to high job demands increased 10%-25% in 1991-1999 among nurses and care assistants but became more stable in 2001-2013 and high proportions of high job demands coincided with the increase in SA in 1995-1999. Nurses and care assistants exposed to high job demands had for most years significantly higher SA than non-exposed (rate ratio range: 1.5-2.1). Low job control and low support from supervisors elevated SA significantly only for a few years.

CONCLUSIONS

Exposure to negative work factors among nurses and care assistants was weakly associated with variations in SA, but may be related to their higher level of SA when compared with other occupations. Improved physical and psychosocial working conditions may reduce the elevated SA level in these occupations.

Prevalence and predictors of low future expectations among Syrian refugees resettled in Sweden

Background

Future Expectation is important for motivation and wellbeing, however drastic life events such as in refugee situations may result in low expectations. This study aims to investigate the prevalence and determinants of low future expectations among Syrian refugees resettled in Sweden.

Methods

A random sample of 1215 Syrian refugees resettled in Sweden responded to questionnaire. Weighted analyses and adjusted relative risks were conducted to determine the prevalences and predictors of low future expectations. Synergy index was calculated for low social support and depression in relation to low expectations.

Results

The prevalences of low future expectations for labour market, social and economic intergration were 10.9%, 13.4% and 14.1% respectively. Longer stay in Sweden, being older, low social support and depression were associated with low future expectations. The simultaneous presence of depression and low social support had a synergistic effect on low social expectation.

Discussions

Understanding and addressing factors related to low future expectations among refugees may be useful for facilitating their labour market, social and economic integration.

Work disability patterns before and after incident acute myocardial infarction and subsequent risk of common mental disorders: A Swedish cohort study

This study investigated the extent to which work disability patterns including sickness absence and disability pension (SA/DP) before and after acute myocardial infarction (AMI) were associated with subsequent common mental disorders (CMDs) such as depression and anxiety in AMI patients without previous CMD. Total 11,493 patients 26–64 years with incident AMI during 2008–10 were followed up for CMD (measured as antidepressant prescription) through 2013. Four SA/DP trajectory groups during the 3-years pre-AMI and 1-year post-AMI were identified. Hazard ratios (HRs) with 95% confidence intervals for subsequent CMD were estimated in Cox models. Higher pre-AMI SA/DP annual levels (>1–12 months/year) were associated with 40–60% increased CMD rate than the majority (78%) with low increasing levels (increasing up to 1 month/year). Regarding post-AMI findings, constant high (~25–30 days/month) SA/DP levels within the first 3 months was associated with a 76% higher CMD rate, compared to constant low (0 days/month). A gradually decreasing post-AMI SA/DP pattern over a 12-month period suggested protective influences for CMD (HR = 0.80). This is the first study to demonstrate that pre- and post-AMI work disability patterns are associated with subsequent CMD risk in AMI patients. Work disability patterns should be considered as an indicator of AMI prognosis in terms of CMD risk.

Work disability before and after incident myocardial infarction and subsequent common mental disorder

Background

This study investigated the extent to which work-disability patterns including sickness absence and disability pension (SA/DP) before and after acute myocardial infarction (AMI) were associated with subsequent common mental disorders (CMDs) such as depression and anxiety in AMI patients without previous CMD.

Methods

A cohort of 11,493 patients aged 26-64 years without previous CMD with incident AMI during 2008-2010 were followed up for CMD measured as antidepressant prescription through 2013. Four SA/DP trajectory groups during the 3 years pre-AMI and 1 year post-AMI were identified. Hazard ratios (HR) and 95% confidence intervals (CI) were estimated in Cox models.

Results

Higher pre-AMI SA/DP levels (&gt;1-12 months/year), compared to the majority of patients (78%) following low increasing annual levels (increasing up to 1 month/year) of pre-AMI SA/DP, were associated with a 40-60% increased CMD rate. Regarding post-AMI findings, constant high (∼25-30 days/month) and steeply decreasing SA/DP levels within the first 3 months were associated with a 76% and 35% higher CMD rate, respectively, compared to constant low (&lt;1 days/month) levels. Conversely, a gradually decreasing pattern of post-AMI SA/DP over a 12-month period suggested protective influences for CMD (HR = 0.80), even after adjusting for sociodemographic and medical factors.

Conclusions

This is the first study to demonstrate that pre- and post-AMI work disability patterns are associated with subsequent CMD risk in AMI patients. Work disability patterns should be considered in clinical practice as an indicator of AMI prognosis in terms of CMD risk.

Key messages

Increasing and high persistent levels of pre-AMI work disability are associated with higher risk of subsequent CMD, while gradually decreasing post-AMI work disability has a favourable CMD prognosis. Pre- and post-AMI patterns of work disability (sickness absence and disability pension) can be a useful marker in terms of CMD prognosis.

Changes in prescription of antidepressants and disability pension due to back pain, compared with other musculoskeletal and other somatic diagnoses: a cohort study in Sweden

OBJECTIVES

The aim was to investigate differences in the prescription of antidepressants during the transition to disability pension (DP) comparing DP due to back pain with DP due to other musculoskeletal and DP due to other somatic diagnoses.

DESIGN

A population-based cohort study with follow-up 3 years before and after the event. Estimated prevalence and adjusted ORs with 95% CIs for antidepressant prescription were computed for the 7-year window (ie, t-3 to t+3) around the DP by generalised estimating equations for repeated measures.

SETTING AND PARTICIPANTS

This Swedish population-based nationwide study with registry data included individuals aged 18-64 years, with DP due to back pain (n=2011), DP due to other musculoskeletal (n=3548) or DP due to other somatic diagnoses (n=11 809).

PRIMARY OUTCOME MEASURES

Prescription of antidepressants.

RESULTS

Before DP, the prevalence of prescription of antidepressants was stable in DP due to back pain, but increased for the other DP groups. Similarly, the likelihood of prescription increased only marginally before DP due to back pain (ORs from 0.86 at t-3 to 1.10 at t-1), but clearly in DP due to musculoskeletal (from 0.42 to 1.15) and somatic diagnoses (from 0.29 to 0.98). Both prevalence measures and risks remained at the elevated levels after DP.

CONCLUSIONS

Pathways to DP due to musculoskeletal and somatic diagnoses seem to be partly driven by adverse mental health, which remains at a higher level after DP. The increasing prescription of antidepressants prior to DP suggests that special attention should be paid to mental health for prevention of DP. The period after DP needs attention to avoid deterioration of mental health.

Work-disability in low back pain patients with or without surgery, and the role of social insurance regulation changes in Sweden

BACKGROUND

The aims were to study the differences in work-disability in patients with low back pain (LBP) in relation to (i) treatment provided (non-surgical or lumber spine surgery (decompression or fusion), and (ii) two time points, i.e. before and after the social insurance regulation changes in the in 2008.

METHODS

All non-pensioned individuals, aged 19-60 years, living in Sweden, diagnosed with LBP in 2004-06 or 2008-10 were included (n = 153739). Hazard ratios (HRs) with 95% confidence intervals for long-term sickness absence (>90 days, LTSA) and disability pension (DP) for LBP-patients (non-surgical, decompression, fusion, both surgeries) were estimated by Cox regression compared with the matched references from the general population without LBP (n = 566008).

RESULTS

LBP-patients had a higher risk of subsequent work-disability compared with the references before and after insurance regulation changes. LBP-patients receiving decompression surgery had similar risk for later work-disability as those treated non-surgically. However, following regulation changes, LBP-patients undergoing fusion surgery had higher risk estimates of both LTSA (HR: 3.3) and DP (HR: 4.8) than patients treated non-surgically (HR: LTSA 2.1; DP 2.5) or with decompression (HR: LTSA 2.6; DP 2.1). In the adjusted models, risk estimates mainly attenuated after controlling for previous sickness absence.

CONCLUSION

Risk for subsequent work-disability among LBP-patients was higher compared with people without LBP and lumbar spine surgery. Discrepancies in risk were explained by the treatment provided previous sickness absence and changes in the social insurance regulations, specifically LBP-patients treated with fusion surgery had an increased risk of subsequent work-disability after changes in regulations.

Labour market marginalisation in obsessive-compulsive disorder: a nationwide register-based sibling control study

BACKGROUND

The impact of obsessive-compulsive disorder (OCD) on objective indicators of labour market marginalisation has not been quantified.

METHODS

Linking various Swedish national registers, we estimated the risk of three labour market marginalisation outcomes (receipt of newly granted disability pension, long-term sickness absence and long-term unemployment) in individuals diagnosed with OCD between 2001 and 2013 who were between 16 and 64 years old at the date of the first OCD diagnosis (n = 16 267), compared with matched general population controls (n = 157 176). Hazard ratios (HR) with 95% confidence intervals (CI) were calculated using Cox regression models, adjusting for a number of covariates (e.g. somatic disorders) and stratifying by sex. To adjust for potential familial confounders, we further analysed data from 7905 families that included full siblings discordant for OCD.

RESULTS

Patients were more likely to receive at least one outcome of interest [adjusted HR = 3.63 (95% CI 3.53-3.74)], including disability pension [adjusted HR = 16.36 (95% CI 15.34-17.45)], being on long-term sickness absence [adjusted HR = 3.07 (95% CI 2.95-3.19)] and being on long-term unemployment [adjusted HR = 1.72 (95% CI 1.63-1.82)]. Results remained similar in the adjusted sibling comparison models. Exclusion of comorbid psychiatric disorders had a minimal impact on the results.

CONCLUSIONS

Help-seeking individuals with OCD diagnosed in specialist care experience marked difficulties to participate in the labour market. The findings emphasise the need for cooperation between policy-makers, vocational rehabilitation and mental health services in order to design and implement specific strategies aimed at improving the patients' participation in the labour market.

Healthy migrant effect in the Swedish context: a register-based, longitudinal cohort study

OBJECTIVES

Studies have found a 'healthy-migrant effect' (HME) among arriving migrants, that is, a better health status compared with others in the home country, but also in comparison with the population in the host country. The aims were to investigate whether the HME hypothesis is applicable to the Swedish context, that is, if health outcomes differed between a group of mainly labour migrants (Western migrants) and a group of mainly refugee/family reunion migrants (non-Western migrants) compared with the native Swedish population, and if there were any correlations between labour market attachment (LMA) and these health outcomes.

DESIGN

Register-based, longitudinal cohort study.

PARTICIPANTS

The cohort was defined on 31 December 1990 and consisted of all migrants aged 18-47 years who arrived in Sweden in 1985-1990 (n=74 954) and a reference population of native Swedes (n=1 405 047) in the same age span. They were followed for three consecutive 6-year periods (1991-1996, 1997-2002 and 2003-2008) and were assessed for five measures of health: hospitalisation for cardiovascular and psychiatric disorders, mortality, disability pension, and sick leave.

RESULTS

Western migrants had, compared with native Swedes, lower or equal HRs for all health measures during all time periods, while non-Western migrants displayed higher or equal HRs for all health measures, except for mortality, during all time periods. Age, educational level, occupation and LMA explained part of the difference between migrants and native Swedes. High LMA was associated with higher HRs for cardiovascular disorders among Western migrants, higher HRs of psychiatric disorders among non-Western migrants and higher HRs of mortality among both migrant groups compared with native Swedes.

CONCLUSIONS

There were indications of a HME among Western migrants, while less proof of a HME among non-Western migrants. Stratification for LMA and different migrant categories showed some interesting differences, and measurements of the HME may be inconclusive if not stratified by migrant category or other relevant variables.