A follow-up of the introduction of a maximum entitlement period for receiving sickness benefits in Sweden: A nationwide register-based study

In 2008, Sweden introduced a policy change to limit the number of days for sickness benefits (SB). This study aimed to elucidate the characteristics of those who reached the maximum entitlement period for receiving sickness benefits (MEPSB) and their future main source of income. Methods: All 5,309,759 individuals, aged 20-63 and residents of Sweden in 2009 were followed from July 2008 to July 2010 regarding SB-days and date of MEPSB and then categorised into three groups: I) no SB-days, II) ongoing SB-days, and III) MEPSB. Mean numbers of SB-days 2.5 years before and 2 years after the policy change and main source of income in 2011 were assessed. Associations between sociodemographic factors, occupation and paid work as main source of income were estimated by odds ratio (OR). Results: A total of 0.7% reached MEPSB in 2010. The mean numbers of SB-days before and after the policy change were higher in the MEPSB group than in the other two groups. In the MEPSB group, 14% had their main source of income from paid work in 2011; this was more common among women born in Sweden (OR = 1.29), people living with a partner and children (women OR = 1.29; men OR = 1.48), and those with occupations representing high educational levels. Conclusions: One out of seven individuals with MEPSB in 2010 had their main source of income from paid work in 2011, although they had a long-term SB before and after the policy change. Further research is warranted to address the long-term effects of this policy change.

Predictive validity of the Work Ability Index and its individual items in the general population

Aim: This study assesses the predictive ability of the full Work Ability Index (WAI) as well as its individual items in the general population. Methods: The Work, Health and Retirement Study (WHRS) is a stratified random national sample of 25–75-year-olds living in Sweden in 2000 that received a postal questionnaire ( n = 6637, response rate = 53%). Current and subsequent sickness absence was obtained from registers. The ability of the WAI to predict long-term sickness absence (LTSA; ⩾ 90 consecutive days) during a period of four years was analysed by logistic regression, from which the Area Under the Receiver Operating Characteristic curve (AUC) was computed. Results: There were 313 incident LTSA cases among 1786 employed individuals. The full WAI had acceptable ability to predict LTSA during the 4-year follow-up (AUC = 0.79; 95% CI 0.76 to 0.82). Individual items were less stable in their predictive ability. However, three of the individual items: current work ability compared with lifetime best, estimated work impairment due to diseases, and number of diagnosed current diseases, exceeded AUC > 0.70. Excluding the WAI item on number of days on sickness absence did not result in an inferior predictive ability of the WAI. Conclusions: The full WAI has acceptable predictive validity, and is superior to its individual items. For public health surveys, three items may be suitable proxies of the full WAI; current work ability compared with lifetime best, estimated work impairment due to diseases, and number of current diseases diagnosed by a physician.

Effects of psychosocial work factors and psychological distress on self-assessed work ability: A 7-year follow-up in a general working population

BACKGROUND

Toinvestigate the effects of psychosocial work factors (PWF) and psychological distress (PD) on self-assessed work ability.

METHODS

This follow-up study included 7,810 individuals (55%women) with good work ability at baseline. PWFandPD (measured by GHQ-12) were assessed at baseline and work ability at 7-year follow-up. Effects of PWF and PD on work ability were analyzed by logistic regression, odds ratios (OR) with 95% CI, and by mediation analysisusing 4-way decomposition.

RESULTS

Low support was associated with poor work ability for both women and men (OR 1.78 and 1.89). For men, also low skill discretion was associated with poor work ability (OR 2.07). For both women and men, PD was associated with poor work ability (OR 3.41 and 1.84). PD did not act as an intermediate variablein the association between PWF and work ability.

CONCLUSION

Strategies for sustainable work ability should focus on both working conditions and health factors. Am. J. Ind. Med. 60:121-130, 2017. © 2016 Wiley Periodicals, Inc.

The Association Between Self-Assessed Future Work Ability and Long-Term Sickness Absence, Disability Pension and Unemployment in a General Working Population: A 7-Year Follow-Up Study

Purpose Work ability is commonly measured with self-assessments, in the form of indices or single items. The validity of these assessments lies in their predictive ability. Prospective studies have reported associations between work ability and sickness absence and disability pension, but few examined why these associations exist. Several correlates of work ability have been reported, but their mechanistic role is largely unknown. This study aims to investigate to what extent individual's own prognosis of work ability predicts labor market participation and whether this was due to individual characteristics and/or working conditions. Methods Self-assessed prognosis of work ability, 2 years from "now," in the Stockholm Public Health Questionnaire (2002-2003) was linked to national registers on sickness absence, disability pension and unemployment up to year 2010. Effects were studied with Cox regression models. Results Of a total of 12,064 individuals 1466 reported poor work ability. There were 299 cases of disability pension, 1466 long-term sickness absence cases and 765 long-term unemployed during follow-up. Poor work ability increased the risk of long-term sickness absence (HR 2.25, CI 95 % 1.97-2.56), disability pension (HR 5.19, CI 95 % 4.07-6.62), and long-term unemployment (HR 2.18, CI 95 % 1.83-2.60). These associations were partially explained by baseline health conditions, physical and (less strongly) psychosocial aspects of working conditions. Conclusions Self-assessed poor ability predicted future long-term sickness absence, disability pension and long-term unemployment. Self-assessed poor work ability seems to be an indicator of future labor market exclusion of different kinds, and can be used in public health monitoring.

Sick-listing adherence: a register study of 1.4 million episodes of sickness benefit 2010-2013 in Sweden

Background

This register study aims to increase the knowledge on how common it is that sickness benefit recipients are sick-listed for as long as their physician prescribes in their medical sickness certificate, i.e. sick-listing adherence, or wholly/partly bring return-to-work (RTW) forward, i.e. early RTW.

Methods

The unit for analysis was an episode of 100% sickness benefit, commenced between 1 January 2010 and 31 December 2013. Completed episodes of sickness benefit and full or partial early RTW was analysed by comparing the prescribed length of sick leave in medical sickness certificates and benefit days disbursed by the sickness insurance system. Probability for a full and partial early RTW was estimated with hazard ratio (HR) using the Cox proportional hazard model.

Results

In total, about 1.4 million episodes of sickness benefit (60% women) were included in the study. The overall sick-listing adherence was 84% for women and 82% for men during the first year of sick leave. Adherence varied between 82 and 87% among women and between 79 and 86% among men with regard to ICD-10 diagnosis chapter. The probability of an early RTW varied between diagnosis chapters, where mental disorders was associated with a lower probability of a full early RTW among women and men (HR 0.52 and HR 0.47) as well as a partial early RTW (HR 0.51 and HR 0.46). Younger age (16–29 years), high educational level and high income was associated with a higher probability of an early RTW, while older age (≥50 years), not native-born, low educational level, unemployment and parental leave were associated with a lower probability.

Conclusion

The study demonstrates that sick-listing adherence is relatively high. Probability of an early RTW differs with regard to diagnosis chapter, demographic, socioeconomic and labour market characteristics of the sickness benefit recipients. Interventions intended to improve the sick-listing process, and to affect the length and degree of sick leave in certain target groups, should include measures targeted at physicians’ sick-listing practices. Policies and economic incentives aimed at promoting RTW need to focus on individuals’ residual capacity for work.

How common is change of primary diagnosis during an episode of sickness benefit? A register study of medical sickness certificates issued 2010-2012 in Sweden

AIM

The aims of this study were to investigate how common it is to change primary diagnosis between different diagnostic chapters during a sick-leave spell, and to explore patterns of diagnostic changes.

METHODS

The unit for analysis was episode of sickness benefit, that is, sick leave >14 days, which commenced between 2010 and 2012 in Sweden. For each case, the primary diagnosis was retrieved from the first and last/latest medical sickness certificate, respectively. The number of days of sickness benefit was linked to the cases. Any change of primary diagnosis was analysed by diagnostic chapter according to the ICD-10, and this was done separately for women and men.

RESULTS

In total, 803,041 cases of sickness benefit (63% women) were included in the study. During a sick-leave spell, 7.1% of female cases and 6.6% of male cases changed their primary diagnosis to a diagnosis from another diagnostic chapter. The change of primary diagnosis increased with the number of days with sickness benefit. For female cases, this increase was from 2.0% for cases that lasted 15-30 days to 20.2% for cases that lasted >365 days. For male cases, the corresponding increase was from 1.8% to 21.2%. A change of primary diagnosis was least common among those initially sick-listed for mental disorders and musculoskeletal disorders. The patterns of diagnostic changes were rather similar for women and men.

CONCLUSIONS

A change of diagnosis during a sick-leave spell needs to be taken into consideration by the sickness insurance system and in the actions taken by its administration. Registry-based studies of sickness insurance need to consider diagnostic changes in both the study design and the interpretation of results.

First-time decisions regarding work injury annuity due to occupational disease: a gender perspective

OBJECTIVES

This study presents an investigation of first-time decisions regarding work injury annuity due to occupational disease. Focus is a number of potential underlying factors behind the gender gap, where women are disadvantaged, in the granting of work injury annuity.

METHODS

All 99 subjects (80 men and 19 women) who met the conditions of long-lasting reduction of work ability due to occupational disease (not occupational accident) in the Swedish Work Injury Insurance Act and were granted work injury annuity in 2010, together with a random sample of 118 subjects (55 men and 63 women) who were denied annuity in the same year, were selected for analysis. Each subject's case file from the Social Insurance Agency was examined with regards to cause of disease, diagnosis and the Social Insurance Agency's management and decision making of claims. The data were analysed by logistic regression analysis.

RESULTS

Men had a higher probability of being granted work injury annuity than women for musculoskeletal disorders (OR 4.16), mental disorders (OR 7.93) and diseases in other diagnostic chapters (OR 3.65). After adjustment for age, country of birth, diagnosis, work exposure factors and decision support factors, the higher probability for men of being granted work injury annuity remained (full model: OR 2.67, 95% CI 1.20 to 5.94).

CONCLUSIONS

Actions are necessary in order to establish equitable and gender-neutral treatment of work injury insurance claims. There is a need for more detailed knowledge of exposures in female-dominated jobs and the relationship between these exposures and occupational disease.

Work and health among immigrants and native Swedes 1990-2008: a register-based study on hospitalization for common potentially work-related disorders, disability pension and mortality

Background

There are many immigrants in the Swedish workforce, but knowledge of their general and work-related health is limited. The aim of this register-based study was to explore whether documented migrant residents in Sweden have a different health status regarding receipt of a disability pension, mortality and hospitalization for lung, heart, psychiatric, and musculoskeletal disorders compared with the native population, and if there were variations in relation to sex, geographical origin, position on the labor market, and time since first immigration.

Methods

This study included migrants to Sweden since 1960 who were 28–47 years old in 1990, and included 243 860 individuals. The comparison group comprised a random sample of 859 653 native Swedes. These cohorts were followed from 1991 to 2008 in national registers. The immigrants were divided into four groups based on geographic origin. Hazard ratios for men and women from different geographic origins and with different employment status were analyzed separately for the six outcomes, with adjustment for age, education level, and income. The influence of length of residence in Sweden was analyzed separately.

Results

Nordic immigrants had increased risks for all investigated outcomes while most other groups had equal or lower risks for those outcomes than the Swedes. The lowest HRs were found in the EU 15+ group (from western Europe, North America, Australia and New Zealand). All groups, except Nordic immigrants, had lower risk of mortality, but all had higher risk of disability pension receipt compared with native Swedes. Unemployed non-Nordic men displayed equal or lower HRs for most outcomes, except disability pension receipt, compared with unemployed Swedish men. A longer time since first immigration improved the health status of men, while women showed opposite results.

Conclusions

Employment status and length of residence are important factors for health. The contradictory results of low mortality and high disability pension risks need more attention. There is great potential to increase the knowledge in this field in Sweden, because of the high quality registers.

The effect of flooring on musculoskeletal symptoms in the lower extremities and low back among female nursing assistants

This study examines the effect of changing the floor from a 2-mm homogenous vinyl floor to a 4-mm heterogeneous vinyl floor (1.5-mm wear layer and 2.5-mm foam layer) on musculoskeletal symptoms in the lower extremities and low back among nursing assistants in a geriatric care centre. A pre-post design with a reference group consisting of nursing assistants from a similar geriatric care centre was used. Follow-up measurements were carried out 12 and 24 months after the intervention by means of questionnaires. At the 1-year follow-up, the pain intensity score in the feet of the intervention group had decreased compared with the baseline value and remained statistically significant at the 2-year follow-up. The decrease in pain intensity score of the feet in the intervention group was statistically significantly different from the reference group, both after 1 and 2 years.

PRACTITIONER SUMMARY

The results show the importance of flooring in the workplace with regard to reducing musculoskeletal symptoms. Appropriate flooring is especially important in the female-dominated health care sector, where workers must stand or walk for long periods.

Prevalence of low back pain and concurrent psychological distress over a 16-year period

OBJECTIVES

To investigate time trends of low back pain (LBP) and concurrent psychological distress in the general population.

METHODS

Every 4 years between 1990 and 2006, a self-administered questionnaire including the General Health Questionnaire (GHQ-12) and a question on LBP were sent to a random sample of the population in the county of Stockholm (response rate 61-69%). All individuals aged 21-64 years in the five samples (n = 1976-26,611) were included in the study.

RESULTS

Among women, the prevalence of self-reported LBP rose rather moderately during the 16-year period, from 12.5% to 16.4% (prevalence rate ratio (PRR) 1.31; 95% CI 1.11 to 1.55). The prevalence did not change at all among men (PRR 1.02; 95% CI 0.85 to 1.23). In contrast, the prevalence of LBP with concurrent psychological distress rose more substantially, from 2.6% to 5.9% among women (PRR 2.23; 95% CI 1.53 to 3.24) and from 1.9% to 3.5% among men (PRR 1.82; 95% CI 1.14 to 2.90). The prevalence of both LBP and LBP with concurrent psychological distress seemed to fluctuate somewhat over the period.

CONCLUSIONS

Between 1990 and 2006, the focus of discussion of the high societal costs for sickness absence and disability pensions gradually shifted from musculoskeletal disorders to psychological well-being. As a result, the general population's awareness and perception of pain and psychological distress may have changed and, in turn, affected individuals' willingness to report these symptoms. Further research is necessary to investigate the impact of cultural changes on subjective symptom reporting.

Different working and living conditions and their associations with persistent neck/shoulder and/or low back disorders

OBJECTIVES

To investigate whether different combinations of working and living conditions are associated with the risk for persistent neck/shoulder and/or low back disorders. The underlying purpose of this contextual approach was to identify target groups for primary/secondary prevention.

METHODS

In a baseline study, 11 groups with different working and living conditions were identified by cluster analysis. In this study, these 11 groups were followed up by a postal questionnaire 5 years after baseline (response rate 82%, n = 1095).

RESULTS

Five of the groups--the onerous human services job, the free agent, the family burden, the mentally stretched and the physically strained groups--had an increased risk for persistent disorders (OR 2.38-2.70). Four of these groups had rather sex-specific working and living conditions.

CONCLUSIONS

The results support the hypothesis that different combinations of working and living conditions may increase the risk for persistent neck/shoulder and/or low back disorders to different degrees. Sex-specific working and living conditions increased the risk for women as well as for men, irrespective of whether the conditions were specific to women or men.

Target groups for prevention of neck/shoulder and low back disorders: an exploratory cluster analysis of working and living conditions

Musculoskeletal disorders (MSDs) have a multifactorial etiology. Therefore, a holistic approach to identifying target groups for primary/secondary prevention is essential. In this study, an exploratory person-oriented approach was applied, using cluster analysis of variables related to physical and psychosocial work conditions, and conditions in the private sphere, on a data set of 1,341 Swedish women and men who had not sought care for MSDs the 6 months preceding enrollment in the study. Three groups at risk and five "healthy" groups regarding MSDs were identified. Two of the risk groups had a strained situation regarding psychosocial work conditions or domestic/family conditions, respectively. The majority of individuals in these groups were women. The third risk group had a strained situation regarding both physical and psychosocial work conditions. This group consisted largely of men working in male-dominated jobs. The five healthy groups had low/moderate metabolic demands at work, and all of them having high proportions of subjects with moderate to high education, and fairly even distributions of men and women. In conclusion, the results indicate that gender-specific working and living conditions are associated with an increased risk for MSDs. The identification of these subgroups in the population may facilitate a selective prevention approach.

Awkward work postures: association with occupational gender segregation

BACKGROUND

Segregation of men and women into different jobs is often cited as one of the most plausible explanations for gender differences in exposure and musculoskeletal disorders.

METHODS

Direct measurements of sitting, arm, and trunk postures were taken with two different technical instruments on 156 subjects (78 matched pairs of one female and one male worker) over one full workday in diverse labor markets.

RESULTS

Exposure differences between workers were strongly associated with vertical occupational segregation (measured as level of status/authority). The results showed that this association was strongest for female-dominated jobs. Workers in female-dominated jobs with a low status/authority experienced longer duration in standing posture (P = 0.001), and higher frequency of arm elevation (P = 0.028 and 0.040 for the dominant and the non-dominant arm, respectively). They also had longer duration of work with bent trunk compared to corresponding workers with high status/authority (P = 0.035). The association was less pronounced for male-dominated jobs, and no such association was found for gender-integrated jobs.

CONCLUSION

The findings have implications for prevention as well as for future research.

Excessive physical demands in modern worklife and characteristics of work and living conditions of persons at risk

OBJECTIVES

This study attempted to identify work and leisure-time conditions and life-style factors associated with excess metabolic levels (metabolic demands exceeding one-third of a person's aerobic capacity) at work among men and women.

METHODS

The study focused upon psychological, ergonomic, and physically loading factors and chemical and physical environmental conditions. Data were obtained through self-reports, interviews, workplace analyses, technical measurements, and observations. Gender-specific calculations were used in univariate analyses and in stepwise logistic regression models for excess metabolic level.

RESULTS

Twenty-seven percent of the men and twenty-two percent of the women worked at an excess metabolic level during their workday. Awkward work postures, heavy manual materials handling, high circulatory strain, chemical exposures, noise levels, much routine work, and many obstacles to job performance characterized their work conditions. The women had low skill discretion and more often atypical workhours, while the men showed high circulatory strain during leisure-time activities. Important negative life-style factors were a high consumption of alcohol for the men and a high body mass index and no or little regular physical exercise for the women.

CONCLUSIONS

Metabolic demands in worklife today remain high. The women who exceeded the recommended metabolic level at work in this study were characterized by low pay, poor health, and children at home, in addition to high physical load and psychosocial strain at work. These characteristics indicate a group with few possibilities to leave a hazardous job for a less physically demanding one. The men who worked at an excess metabolic level seemed to be characterized more by a life-style common in some male-dominated work cultures with monotonous work.

Physical demands in working life and individual physical capacity

The purpose of this study was to investigate the prevalence of the excess of metabolic level (metabolic demands in work exceeding one-third of the individual's aerobic capacity) of working men and women today and to describe the population whose metabolic level is exceeded. A second aim was to explore how externally assessed metabolic demands match with the physical function and capacity of working men and women in jobs with the lowest and the highest demands. The aerobic power of each individual (94 men and 94 women) was estimated from heart rate and workload in sub-maximal tests from dynamic legwork on a cycle ergometer. Physical activity was assessed using a task-oriented interview technique. Physical function was measured by tests of muscle endurance in arms, abdomen and legs, handgrip pressure, balance and coordination. The calculation of individual metabolic demands during a "typical working day" showed that 27% of the men and 22% of the women exceeded their metabolic level. The results indicate that the physical fitness is low or somewhat low for two-thirds of the 94 men and for more than one-half of the 94 women. Women in the group with the highest job demands had significantly lower muscle endurance in the abdomen and legs and worse coordination than women in the group with the lowest job demands. Metabolic demands in working life today remain high. This is reflected in a mismatch between individual physical capacity and the physical demands of work for 25% of the population.

Validity of a self-administered questionnaire for assessing physical work loads in a general population

The aim of the study was to evaluate eight questions concerning physical loads, used in public health questionnaires. Working women and men (203) completed a self-administered questionnaire twice, following a test-retest method. The questions were also validated with a structured interview. Response agreement was calculated with Cohen's kappa statistics with quadratic weights (kappa w). Test-retest agreement varied from 0.74 to 0.92, and inter-method agreement from 0.38 to 0.81. The lowest coefficients were for the questions concerning bent/twisted work postures (kappa w 0.38) and repetitive movements (kappa w 0.39). The results did not indicate any substantial influence of gender, type of work or musculoskeletal complaint. The questions concerning general physical activity and sitting work postures, and physical exercise/sports during leisure times, had good validity. The questions concerning bent/twisted work posture and repetitive movements need to be re-designed.