Petter Tinghög

To what extent may the association between immigrant status and mental illness be explained by socioeconomic factors

BackgroundImmigrants in Sweden have a higher rate of mental illness than the native Swedes. This study investigated to what extent the association between immigrant status and mental illness can be explained by a different distribution of known risk factors for impaired mental health between groups of immigrants and persons born in Sweden.MethodsThe study is based on data from the Swedish PART-study, designed to identify risk factors for, and social consequences of, mental illness. The study population consists of a random sample of 10,423 Swedish citizens, whereof 1,109 were immigrants. The data was collected in the year 2000. The immigrants were divided into three groups based on country of origin (Scandinavians born outside Sweden, Europeans born outside Scandinavia, non-Europeans). The occurrence of mental illness among immigrants and native Swedes were compared not adjusting and adjusting for indicators of socioeconomic advantage/disadvantage (education, income, labour market position, etc). Mental illness was approximated with the WHO (ten) wellbeing index scale and depressive symptoms were measured with the major depression inventory scale (MDI).ResultsImmigrants’ excess risk for low subjective wellbeing was completely accounted for by adjustment for known risk factors in all the immigrant groups. However, social-economic disadvantages could not account for the non-European immigrants’ higher prevalence of depression (MDI), although the increased relative risk found in univariate analyses was substantially reduced.ConclusionsThe findings in this study suggest that the association between immigrant status and mental illness appears above all to be an effect of a higher prevalence of social and economic disadvantage.

The association of immigrant- and non-immigrant-specific factors with mental ill health among immigrants in Sweden.

Background: It has often been shown that immigrants are particularly at risk for mental ill health. The aim of the study was to investigate the association of immigrant- and non-immigrant-specific factors with mental ill health within a diverse immigrant population. Method: An extensive questionnaire was sent out to a stratified random sample of three immigrant populations from Finland, Iraq and Iran. The 720 respondents completed a Swedish, Arabic or Farsi (Persian) version of the questionnaire including the WHO (10) Well-Being Index and the HSCL-25. Results: The results indicate that mental ill health among immigrants is independently associated with non-immigrant-specific factors (i.e. high number of types of traumatic episodes, divorced/widowed, poor social network, economic insecurity and being female) and immigrant-specific factors (i.e. low level of sociocultural adaptation). These results were obtained regardless of whether mental ill health was operationalized as low subjective well-being or a high symptom level of anxiety/depression. Conclusions: These fi ndings support the notion that mental ill health among immigrants is a multi-faceted phenomenon that needs to be tackled within a wide range of sectors — e.g. the healthcare system, the social service sector and, of course, the political arena.

High prevalence of sickness absence and disability pension among multiple sclerosis patients : a nationwide population-based study.

Introduction: Although multiple sclerosis (MS) often implies substantial disability, there is little knowledge about sick leave and disability pension among MS patients. Objectives: The purpose of this study was to estimate the prevalence rates of sick leave and disability pension among MS patients and to explore how socio-demographics are associated with such rates. Methods: The register data of all people who lived in Sweden in 2005 and were 16–64 years old was used to identify 9721 MS patients and matched controls. Adjusted odds ratios (ORs) with 95% confidence intervals (CIs) were calculated and effect modifications were evaluated with Wald X2 tests. Results: In 2005, 61.7% of the MS patients were on partial or full disability pension compared to 14.2% among the controls. Of the others, 36.8% had ≥1 sick-leave spell for >14 days during that year. Socio-demographics were similarly associated with sick leave and disability pension among MS patients and controls, with the noteworthy exceptions that female gender and immigration status were less potent risk factors in the MS population (p<0.05). Conclusion: In spite of widespread access to modern health care including disease-modifying drugs, the majority of MS patients of working ages were on a disability pension. Strategies enabling MS patients to retain their footing in the labour market are needed.

Cost of Illness of Multiple Sclerosis : A Systematic Review

Background Cost-of-illness (COI) studies of Multiple Sclerosis (MS) are vital components for describing the economic burden of MS, and are frequently used in model studies of interventions of MS. We conducted a systematic review of studies estimating the COI of MS, to compare costs between studies and examine cost drivers, emphasizing generalizability and methodological choices. Material and method A literature search on studies published in English on COI of MS was performed in PubMed for the period January 1969 to January 2014, resulting in 1,326 publications. A mapping of studies using a bottom-up approach or top-down approach, respectively, was conducted for the 48 studies assessed as relevant. In a second analysis, the cost estimates were compared between the 29 studies that used a societal perspective on costs, human capital approach for indirect costs, presenting number of patients included, time-period studied, and year of price level used. Results The mapping showed that bottom-up studies and prevalence approaches were most common. The cost ratios between different severity levels within studies were relatively stable, to the ratio of 1 to 2 to 3 for disability level categories. Drugs were the main cost drivers for MS-patients with low disease severity, representing 29% to 82% of all costs in this patient group, while the main cost components for groups with more advanced MS symptoms were production losses due to MS and informal care, together representing 17% to 67% of costs in those groups. Conclusion The bottom-up method and prevalence approach dominated in studies of COI of MS. Our findings show that there are difficulties in comparing absolute costs across studies, nevertheless, the relative costs expressed as cost ratios, comparing different severity levels, showed higher resemblance. Costs of drugs were main cost drivers for less severe MS and informal care and production losses for the most severe MS.

Cross‐cultural equivalence of HSCL‐25 and WHO (ten) Wellbeing Index : findings from a population‐based survey of immigrants and non‐immigrants in Sweden

The aim of this study was to investigate whether the Hopkins Symptom Checklist (HSCL-25) and the WHO (ten) Wellbeing Index are cross-culturally equivalent by comparing Scandinavians with Middle Eastern immigrants in Sweden. The study population consisted of a stratified random sample of native-born Swedes and immigrants from Finland, Iraq and Iran. Both instruments loaded on a single factor in the respective populations. A few of the items did however not discriminate or predict equally well in the groups, nonetheless it was found to have marginally influenced the instruments’ total scores in both groups. The analyses also revealed that the groups had similar intercept and slope when the exogenous factor traumatic episodes was used to predict the measurement scores, supporting scalar equivalency. In conclusion, the results support the use of these instruments in population-based surveys within multicultural Western societies.

Work Disability Before and After Diabetes Diagnosis: A Nationwide Population-Based Register Study in Sweden

OBJECTIVES We evaluated the risk of work disability (sick leave and disability pension) before and after diabetes diagnosis relative to individuals without diabetes during the same time period, as well as the trajectory of work disability around the diagnosis. METHODS This Swedish population-based cohort study with register data included 14 428 individuals with incident diabetes in 2006 and 39 702 individuals without diabetes during 2003 to 2009. RESULTS Work disability was substantially higher among people with diabetes (overall mean = 95 days per year over the 7 years, SD = 143) than among those without diabetes (mean = 35 days, SD = 95). The risk of work disability was slightly higher after diabetes diagnosis than before and compared with the risk of those without diabetes. The trajectory of work disability was already increasing before diagnosis, increased even more at the time of diagnosis, and leveled off after diagnosis. Individual sociodemographic characteristics and comorbid conditions contributed both to the risk and to the trajectory of work disability. CONCLUSIONS Although diabetes has an independent effect on work disability, sex, age, education, and comorbid conditions play a significant role.

Suicide among first-generation and second-generation immigrants in Sweden: association with labour market marginalisation and morbidity

Background Previous research suggests that first-generation immigrants have a lower suicide risk than those both born in Sweden and with both parents born in Sweden (natives), while the suicide risk in the second generation seems higher. The aim of this study was to investigate to what extent suicide risk in first-generation and second-generation (both parents born abroad) and intermediate-generation (only one parent born abroad) immigrants compared with natives is associated with sociodemographic factors, labour market marginalisation and morbidity. Methods A prospective population-based cohort study of 4 034 728 individuals aged 16–50 years was followed from 2005 to 2010. HRs for suicide were calculated for first-generation, intermediate-generation and second-generation immigrants compared with natives. Analyses were controlled for sociodemographic factors, morbidity and labour market marginalisation. Results The HR of suicide was significantly lower in first-generation immigrants (HR 0.83 CI 0.76 to 0.91), and higher in second-generation (HR 1.32, CI 1.15 to 1.52) and intermediate-generation immigrants (HR 1.20, CI 1.08 to 1.33) in comparison to natives. The excess risk was explained by differences in sociodemographics, morbidity and labour market marginalisation. In the fully adjusted models, a higher HR remained only for the Nordic second generation (HR 1.29, CI 1.09 to 1.52). There were no sex differences in HRs. Conclusions The risk of suicide was shown to be lower in the first generation and higher in the second generation compared with natives. The higher HR in the Nordic second generation was not explained by differences in sociodemographics, labour market marginalisation and morbidity. Further research is warranted to investigate factors underlying this excess risk.

Future risk of labour market marginalization in young suicide attempters—a population-based prospective cohort study

BACKGROUND Research on future labour market marginalization following suicide attempt at young age is scarce. We investigated the effects of suicide attempts on three labour market outcomes: unemployment, sickness absence and disability pension. METHODS We conducted a prospective cohort study based on register linkage of 1,613,816 individuals who in 1994 were 16-30 years old and lived in Sweden. Suicide attempters treated in inpatient care during the 3 years preceding study entry, i.e. 1992-94 (N=5649) were compared with the general population of the same age without suicide attempt between 1973 and 2010 (n=1,608,167). Hazard ratios (HRs) for long-term unemployment (>180 days), sickness absence (>90 days) and disability pension in 1995-2010 were calculated by Cox regression models, adjusted for a number of parental and individual risk markers, and stratified for previous psychiatric inpatient care not due to suicide attempt. RESULTS The risks for unemployment [HR 1.58; 95% confidence interval (CI) 1.52-1.64], sickness absence (HR 2.16; 2.08-2.24) and disability pension (HR 4.57; 4.34-4.81) were considerably increased among suicide attempters. There was a dose-response relationship between number of suicide attempts and the risk of disability pension, for individuals both with or without previous psychiatric hospitalizations not due to suicide attempts. No such relationship was present with regard to unemployment. CONCLUSIONS This study highlights the strong association of suicide attempts with future marginalization from the labour market, particularly for outcomes that are based on a medical assessment. Studies that focus only on unemployment may largely underestimate the true detrimental impact of suicide attempt on labour market marginalization.

Synergistic effect between back pain and common mental disorders and the risk of future disability pension: a nationwide study from Sweden.

BACKGROUND The aim of this study was to analyse a possible synergistic effect between back pain and common mental disorders (CMDs) in relation to future disability pension (DP). METHOD All 4,823,069 individuals aged 16-64 years, living in Sweden in December 2004, not pensioned in 2005 and without ongoing sickness absence at the turn of 2004/2005 formed the cohort of this register-based study. Hazard ratios (HRs) and 95% confidence intervals (CIs) for DP (2006-2010) were estimated. Exposure variables were back pain (M54) (sickness absence or inpatient or specialized outpatient care in 2005) and CMD (F40-F48) [sickness absence or inpatient or specialized outpatient care or antidepressants (N06a) in 2005]. RESULTS HRs for DP were 4.03 (95% CI 3.87-4.21) and 3.86 (95% CI 3.68-4.04) in women and men with back pain. HRs for DP in women and men with CMD were 4.98 (95% CI 4.88-5.08) and 6.05 (95% CI 5.90-6.21). In women and men with both conditions, HRs for DP were 15.62 (95% CI 14.40-16.94) and 19.84 (95% CI 17.94-21.94). In women, synergy index, relative excess risk due to interaction, and attributable proportion were 1.24 (95% CI 1.13-1.36), 0.18 (95% CI 0.11-0.25), and 2.08 (95% CI 1.09-3.06). The corresponding figures for men were 1.45 (95% CI 1.29-1.62), 0.29 (95% CI 0.22-0.36), and 4.21 (95% CI 2.71-5.70). CONCLUSIONS Co-morbidity of back pain and CMD is associated with a higher risk of DP than either individual condition, when added up, which has possible clinical implications to prevent further disability and exclusion from the labour market.

Sources and level of income among individuals with multiple sclerosis compared to the general population: A nationwide population-based study:

Introduction: Multiple sclerosis (MS) is associated with reduced work capacity, but there is limited knowledge about MS patients’ sources of income. Objectives: The purpose of this study was to elucidate MS patients’ earnings and social benefits compared to those of the general population. Methods: From nationwide registers of all residents in Sweden aged 21–64 years in 2010 (n=5,291,764), those with an MS diagnosis (n=13,979) were compared to a propensity score matched reference group (n=69,895). Descriptive statistics and regression models were used to estimate the percentage difference between the MS patients and the matched references regarding the following annual incomes: earnings, disability pension, sickness absence, disability allowance, unemployment compensation and social assistance. Results: Both MS patients and the matched references received most of their income from earnings followed by disability pension and sickness absence. MS patients that were diagnosed in 2010 had 15% lower earnings than the matched references, while MS patients diagnosed before 2005 had 38% lower earnings. Corresponding figures regarding summed social benefits were 33% and 130% higher for MS patients, respectively. Conclusion: The results indicate that MS patients are overrepresented, in relative and absolute terms, regarding health-related benefits and have lower levels of earnings. However, the redistributing welfare systems appear to financially compensate the MS patients considerably.