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

Working capacity level defines the specific impairment profile of the comprehensive ICF core set for multiple sclerosis

Multiple sclerosis (MS) unfavorably affects working capacity. The Comprehensive International Classification of Functioning, Disability and Health Core Set for MS (cICF-MS), issued by the World Health Organization, has not yet been extended to evaluate working capacity level (WCL). To evaluate the relative importance of cICF-MS categories in relation to WCL. Persons with MS (PwMS), N = 129, who had been referred to Lithuania's Disability and Working Capacity Assessment Office for WCL determination, were divided into three groups according to the percentage of remaining WCL (WCL1 had 0-25%, WCL2 had 30-40%, and WCL3 had 45-55%). Data regarding the cICF-MS categories were collected through telephone interviews and patient documentation. Using the fractional ranking method, the mean values of cICF-MS impairment were ranked from the most severely affected to the least affected (rank 1-93). Ranks with the 10 highest mean values of impairment severity in each WCL group were included in a descriptive analysis. In the WCL1 and WCL2 groups, the most-affected cICF-MS categories reflected disability related to gait and motor function. The WCL3 group presented with pain, fatigue, and impairments to visual acuity, psychic stability, urination, and memory. This study has identified specific cICF-MS impairment profiles based on remaining WCL.

Future sick leave, disability pension, and unemployment among patients with cancer after returning to work: Swedish register-based matched prospective cohort study

INTRODUCTION

Despite increasing numbers of working-age cancer survivors, evidence on their future work-related circumstances is limited. This study examined their future sick leave, disability pension, and unemployment benefits compared to matched cancer-free individuals.

METHODS

A matched cohort study was conducted using nationwide Swedish registers. In total, 94,411 individuals aged 25 to 59 years when diagnosed with incident cancer in 2001-2012 and who returned to work after cancer were compared with their matched cancer-free individuals (N = 354,814). Follow-up started from the year before cancer diagnosis and continued up to 14 years. Generalized estimating equations were used to calculate incidence rate ratios (IRR) and odds ratios for the difference between cancer survivors and matched cancer-free individuals.

RESULTS

Compared with cancer-free individuals, cancer survivors had six times higher sick-leave days per year after cancer (IRR 6.25 [95% CI, 5.97-6.54] for men; IRR, 5.51 [5.39-5.64] for women). This higher number of sick-leave days declined over time but a two-fold difference persisted. An approximate 1.5 times higher risk of receiving disability pension remained during follow-up. The unemployment days tended to be lower for cancer survivors (IRR, 0.84 [0.75-0.94] for men; IRR, 0.91 [0.86-0.96] for women). Risk of sick leave and disability pension was higher among those with leukemia, colorectal, and breast cancer than skin and genitourinary cancers.

CONCLUSIONS

Cancer survivors who returned to work experienced a high and persisting sick leave and disability pension for over a decade. Prolonged receipt of a high amount of benefits may have long-term adverse impacts on financial circumstances; more knowledge to promote the environment that encourages returning to and remaining in work is needed.

Work Adjustments by Types of Occupations Amongst People with Multiple Sclerosis: A Survey Study

PURPOSE

To explore the occurrence of work adjustments for people with multiple sclerosis (MS) across types of occupations (managerial, office, and manual workers).

METHODS

All working-aged (20-50 years) residents in Sweden diagnosed with MS were invited to participate in a web-based survey in 2021. Responses were linked to individual-level nationwide registers. Descriptive analyses were conducted to compare sociodemographic and clinical variables across occupations as well as other responses. The odds ratio of having any adjustment at work was determined using multinomial logistic regression.

RESULTS

From all 4412 respondents (52% response rate), 3313 employees were included. The majority were women (72%) and had low (24.2%) or mild disease severity (44.7%). Nevertheless, different work adjustments across occupations were observed. Compared to the other occupations, office workers reported more invisible symptoms, more work adjustments and considered adapted schedules as the most important adjustment. On the contrary, more managers reported having no limiting symptoms and consequently, disclosed their diagnosis less often. They also reported having fewer work adjustments and more opportunities to modify their work than office and manual workers. Manual workers had a higher likelihood to report needing more support at work than office workers and managers. Further, a higher likelihood of having work adjustments was associated with progressive MS, higher MS severity, and invisible symptoms.

CONCLUSION

A more severe clinical profile of MS was associated with having work adjustments. The physical demands and responsibilities of an occupation play an important role when requesting and getting work adjustments amongst employees with MS.

Recent trends in disease-modifying therapy use and associated sickness absence and disability pension among people with multiple sclerosis in Sweden

BACKGROUND

Disease-modifying therapies (DMTs) have led to improved health and work productivity among people with multiple sclerosis (PwMS).

OBJECTIVES

To describe trajectories of recent DMT use and their association with sickness absence and/or disability pension (SADP) among PwMS in Sweden.

METHODS

A longitudinal register-based study was conducted among 1395 PwMS with treatment start in 2014/2015. While DMT use over 5 years was assessed using sequence analysis resulting in four clusters, a 7-year (Y-2 toY4) trend of SADP was analyzed using zero-inflated negative binomial regression.

RESULTS

Four clusters of DMT use trajectories were identified: long-term non-high-efficacy (483, 34.6%), long-term high-efficacy (572, 41%), escalation (221, 15.8%), and discontinuation (119, 8.5%). Progressive MS and higher expanded disability status scale scores were associated with the escalation, long-term high-efficacy, or discontinuation clusters. PwMS in the long-term high-efficacy and escalation clusters had higher likelihood of being on SADP. However, PwMS initiating high-efficacy DMTs demonstrated steeper decline in SADP than others.

CONCLUSION

Using sequence analysis, this study showed recent DMT use trajectories among PwMS where initiation of high-efficacy DMTs has become more common. The trend of SADP was stable and lower in those using non-high-efficacy DMTs and larger improvements were shown in those initiating high-efficacy DMTs.

A longitudinal study of distress symptoms and work impairment in immune-mediated inflammatory diseases

OBJECTIVE

We investigated the association between distress symptoms (pain, fatigue, depression, anxiety) and work impairment in four patient populations: multiple sclerosis (N = 107), rheumatoid arthritis (N = 40), inflammatory bowel disease (N = 136) and psychiatric disorders (N = 167).

METHODS

Four waves of data collection were completed over three years. The relationship between distress symptoms and overall work impairment was evaluated with univariate and multivariable quantile logistic regression at the 25th, 50th and 75th percentiles. Models were fit to participant average scores and change scores on distress symptom measures. Covariates included sociodemographic factors, comorbidity, physical disability and cognitive function.

RESULTS

In the primary univariate analyses of overall work impairment at the 50th percentile, greater severity of distress symptoms was associated with greater work impairment: pain (average β = 0.27, p < 0.001; change β = 0.08, p < 0.001), fatigue (average β = 0.21, p < 0.001; change β = 0.09, p < 0.001) depression (average, β = 0.35, p < 0.001; change, β = 0.16, p < 0.001), anxiety (average, β = 0.24, p < 0.001; change, β = 0.08, p < 0 0.01). Findings were similar in multivariable analyses.

CONCLUSION

Pain, fatigue, depression, and anxiety symptoms are important determinants of work impairment in persons with immune-mediated diseases and persons with psychiatric disorders. Successful clinical management of these symptoms has potential to improve work-related outcomes across IMIDs.

Self-employment, sickness absence, and disability pension in multiple sclerosis

Objectives

Early withdrawal from work is common among people with multiple sclerosis (PwMS). However, little is known about how this is influenced by the type of employment. The aims were to explore the distributions of self‐employed and other types of employment (employed or no earnings from work) before and after MS diagnosis and its associations with sickness absence (SA) and disability pension (DP) among PwMS and matched references without MS.

Materials & Method

A 6‐year longitudinal cohort study of 2779 individuals diagnosed with MS in 2008–2012 when aged 20–59 and of 13,863 matched individuals without MS from Sweden's population was conducted. Hazard ratios (HR) of >180 SA and/or DP days/year were compared by employment status among PwMS and references using Cox proportional hazard models with 95% confidence intervals (CI).

Results

Most had no SA or DP. Nevertheless, PwMS had higher SA and DP levels compared with references. PwMS had a higher likelihood to reach >180 days of SA (HR = 4.89, 95% CI = 4.43–5.40) or days of DP (HR = 6.31, 95% CI = 5.46–7.30), irrespective of the employment status. Self‐employed references had less likelihood for >180 SA days than employed references. However, self‐employed and employed PwMS had a similar likelihood for >180 SA days. Transitions of employees to self‐employment were infrequent among PwMS (1.7%) and references (2.6%).

Conclusions

PwMS transit to SA and DP to a higher extent than references. In contrast to individuals without MS, self‐employed PwMS had similar SA levels to employed PwMS. Switching to self‐employment was not a predominant choice for people recently diagnosed with MS.

Long-term trajectories of employment status, workhours and disability support pension status, after a first episode of CNS demyelination

BACKGROUND

People with multiple sclerosis face significant employment-related challenges, with little known of the drivers of these outcomes.

OBJECTIVE

We examined prospective trajectories of employment-related outcomes up to 11 years following a first episode of central nervous system (CNS) demyelination (FCD).

METHODS

Participants were aged 18-59 years, at FCD, with at least two observations and were employed at study entry or anytime during follow-up (n = 207). Outcomes were employment status (full-time, part-time and unemployed), average workhours per week and disability support pension (DSP; receiving/not receiving). We used group-based trajectory modelling to identify groups with common trajectories. Factors associated with trajectory membership were explored using log-multinomial regression.

RESULTS

Distinct trajectories were identified for employment (4), workhours (4) and DSP (2). Compared with stable full-time, female sex was strongly associated with being in the stable part-time trajectory (risk ratio (RR): 5.35; 95% confidence interval (CI) = 2.56-11.20; p < 0.001). A greater level of disability at 5-year review (RR: 1.35; 95% CI = 1.19-1.53) and having more than two comorbidities at baseline (RR: 2.77; 95% CI = 1.37-5.64) were associated with being in early and late deteriorated employment trajectories, respectively. Compared with the increased part-time trajectory, every additional relapse during the 5 years post-FCD was associated with a 10% increased risk of being in the reduced part-time trajectory (RR = 1.10; 95%CI = 1.00-1.22). For every additional EDSS point at 5-year review, the risk of being in the DSP trajectory increased (RR = 1.21; 95% CI = 1.05-1.41).

CONCLUSION

These trajectories indicate substantial heterogeneity and the complex impact of MS on employment from its earliest timepoints. Understanding these trends could enable better targeting of interventions to facilitate workforce retention, particularly for females, those with a higher number of comorbidities, more frequent relapses and greater rate of disability accrual.

Trajectories of sickness absence and disability pension days among people with multiple sclerosis by type of occupation

Background:

Multiple sclerosis (MS) can impact working life, sickness absence (SA) and disability pension (DP). Different types of occupations involve different demands, which may be associated with trajectories of SA/DP among people with MS (PwMS).

Objectives:

To explore, among PwMS and references, if SA/DP differ according to type of occupation. Furthermore, to examine how trajectories of SA/DP days are associated with type of occupation among PwMS.

Methods:

A longitudinal nationwide Swedish register-based cohort study was conducted, including 6100 individuals with prevalent MS and 38,641 matched references from the population. Trajectories of SA/DP were identified with group-based trajectory modelling. Multinomial logistic regressions were estimated for associations between identified trajectories and occupations.

Results:

Increase of SA/DP over time was observed in all occupational groups, in both PwMS and references, with higher levels of SA/DP among PwMS. The lowest levels of SA/DP were observed among managers. Three trajectory groups of SA/DP were identified: Persistently Low (55.2%), Moderate Increasing (31.9%) and High Increasing (12.8%). Managers and those working in Science & Technology, and Economics, Social & Cultural were more likely to belong to the Persistently Low group.

Conclusion:

Results suggest that type of occupation plays a role in the level and course of SA/DP.

How does Gender Influence Sustainable Return to Work Following Prolonged Work Disability? An Interpretive Description Study

PURPOSE

A sustainable return to work (S-RTW) following prolonged work disability poses different challenges, depending on gender. This article provides a synthesis of gender differences in the issues and factors influencing the S-RTW of workers following such a disability.

METHODS

Using an interpretive description method, an integrative review was conducted of the literature on gender differences in S-RTW issues and factors associated with four major causes of work disability. The initial review concerned the 2000-2016 literature; it was subsequently updated for November 2016-March 2020. To explore and contextualise the results, four focus groups were held with stakeholders representing the workplace, insurance, and healthcare systems and workers. Qualitative thematic analysis was performed.

RESULTS

A total of 47 articles were reviewed, and 35 stakeholders participated in the focus groups. The prevailing traditional gender roles were found to have a major gender-specific influence on the attitudes, behaviours, processes and outcomes associated with S-RTW. These differences related to the (1) cumulative workload, (2) work engagement, and (3) expressed and addressed needs.

CONCLUSIONS

The results highlight the importance of taking into account both professional and personal aspects when integrating gender issues into the assessment of workers' needs and subsequently into interventions.

Socioeconomic consequences of multiple sclerosis-A systematic literature review

Multiple sclerosis (MS) is a challenging and disabling condition, predominantly affecting individuals in their early life, and has an impact functionally, financially, and on quality of life. However, there is a lack of systematic approach towards assessing socioeconomic consequences of MS. Our objective was to systematically review observational analytical studies investigating the socioeconomic consequences of MS. We conducted a systematic review on socioeconomic consequences of MS with a focus on employment-, income-, work ability- and relationship-related outcomes between MS and the general population. Additionally, the educational characteristics were extracted. From 4958 studies identified, 187 were assessed for eligibility and a total of 27 studies from eight countries were included in this qualitative assessment; 32 different outcomes were identified. All studies indicated pronounced differences between MS patients and the general population, for example 15%-30% lower employment, lower earnings and higher social benefits, higher absenteeism and presenteeism proportions, higher work disability (eg, sick-leave days) among MS patients. Some studies also indicated differences in the family or relationship characteristics. There were no apparent differences with regard to educational level. In conclusion, socioeconomic data can serve as robust outcome measures to study various aspects of MS reflecting the broader consequences of the disease.

Fine Particulate Matter Related to Multiple Sclerosis Relapse in Young Patients

Objective: Particulate matter (PM) of aerodynamic diameter smaller than 10 μm (PM₁₀) has been associated with multiple sclerosis (MS) relapse. However, the impact of smaller PM with a greater ability to penetrate human organism has never been assessed. We evaluated the impact of PM smaller than 2.5 μm (PM_2.5) on the risk of MS relapse.

Material and Methods: In a case-crossover study, we included 2,109 consecutive hospitalizations likely due to MS relapse in day hospital in 5 MS centers in the Paris area from January 2009 to December 2013. For each hospitalization, the natural logarithm of the average weekly PM_2.5 concentrations (μg/m³) at the patient's residence address during each of the 6 weeks (week[0] to week[−5]) preceding admission was compared with the concentration during the previous week, using a conditional logistic regression adjusted on temperature, flu-like syndrome rate, pollen count, and holiday period.

Results: PM_2.5 average concentration during week[−3] was significantly associated with the risk of hospitalization for MS relapse [OR = 1.21 (CI 1.01;1.46)]. The association was stronger in patients younger than 30 years [OR=1.77 (CI 1.10; 2.83)].

Conclusion: Our study demonstrates an association between exposure to PM_2.5 and MS relapse, particularly in young people.

Types of working-life sequences among people recently diagnosed with multiple sclerosis in Sweden: a nationwide register-based cohort study

OBJECTIVES

To explore sequences of annual states of activity and sickness absence (SA) or disability pension (DP) (SA/DP) among working-aged people with multiple sclerosis (PwMS) as well as characteristics associated with the identified types of working-life sequences.

DESIGN

Nationwide Swedish register-based cohort study from 1 year prior to 5 years after the year of multiple sclerosis (MS) diagnosis.

SETTING

Sweden.

PARTICIPANTS

PwMS diagnosed in 2008-2011 when aged 20-55 (n=2652, 69.9% women).

PRIMARY AND SECONDARY OUTCOME MEASURES

Individual-level sequences spanning 7 years were constructed with annual states regarding activity (income from paid work, student allowances, parental leave or unemployment compensation) and/or SA/DP. Types of working-life sequences were identified among the individuals' sequences using hierarchical cluster analysis with optimal matching dissimilarity measures.

RESULTS

Six types of working-life sequences were identified. The largest cluster, Stable High Activity, represented 48.4% of the cohort. Other types were: Stable High SA/DP (14.5%); Other (4.5%); and three types with mixed activity and varying SA/DP regarding the number of days/year and timing (32.6%). Characteristics of the different identified types of sequences were subsequently investigated. All types of sequences had lower odds for university education (OR range: 0.18-0.72) compared with Stable High Activity. Increasingly higher odds of having anxiety/depression compared with Stable High Activity were observed across the types of sequences, by increasing proportions of SA/DP. Stable High SA/DP sequences were less likely than Stable High Activity to be prescribed MS drugs in the MS diagnosis year (OR 0.61; 95% CI 0.47 to 0.78). All types of sequences had higher disposable income in the final study year than the first, except for Stable High SA/DP sequences (Swedish Krona 4669, 95% CI -1892 to 11 230).

CONCLUSIONS

Diversity in working life was influenced by sociodemographic and clinical characteristics resulting in different activity and SA/DP patterns across the six identified types of working-life sequences.

Gender disparities in health resource utilization in patients with relapsing-remitting multiple sclerosis: a prospective longitudinal real-world study with more than 2000 patients

Background:

For the case of multiple sclerosis, research on gender differences from a health economics perspective has not received much attention. However, cost-of-illness analyses can provide valuable information about the diverse impact of the disease and thus help decision-makers to allocate scarce resources. The aim of this study was to describe healthcare resource use and associated societal costs from a gender perspective. In particular, we aimed to identify how resource utilization potentially differs in certain cost components between men and women.

Methods:

Clinical and economic data were extracted from two prospective, multicentre, non-interventional, observational studies in Germany. Information on health resource use was obtained from all patients on a quarterly basis using a validated questionnaire.

Cost analyses were conducted from the societal perspective including all direct (healthcare-related) and indirect (work-related) costs, regardless of who bears them. Gender-related differences were analysed by a multivariable generalized linear model with a negative binomial distribution and log link function due to the right-skewed distribution pattern of cost data. In addition, costs for men and women were descriptively analysed within subgroups of two-year disease activity.

Results:

In total, 2095 patients (women-to-men ratio of 2.7:1) presented a mean age of 41.85 years and a median Expanded Disability Status Scale of 2 (interquartile range 1–3.5) (p > 0.30 for gender-related differences). Women and men did not statistically differ in total quarterly costs (€2329 ± €2570 versus €2361 ± €2612). For both, costs were higher with advancing disease severity and indirect costs were the main societal cost driver. Regarding healthcare-related resources, women incurred higher costs for ambulant consultations [incidence rate ratio (IRR) 1.16, confidence interval (CI) 1.04–1.31], complementary medicine (IRR 2.41, CI 1.14–5.06), medical consumables (IRR 2.53, CI 1.69–3.79) and informal care (IRR 2.79, CI 1.56–5.01). Among indirect costs, we found higher costs for men for presenteeism (IRR 0.62; CI 0.53–0.72) and higher costs for women for disability pension (IRR 1.62; CI 1.23–2.13).

Conclusions:

Multiple sclerosis poses a significant economic burden on patients, families and society. While the total economic burden did not differ between male and female patients, we found gender differences in specific cost items that are similar to those in the wider non-MS population.

Importance of early treatment decisions on future income of multiple sclerosis patients

Background

Early initiation of disease-modifying treatment (DMT) is associated with better disability outcomes in multiple sclerosis (MS). However, little is known of how treatment decisions affect socio-economic outcomes.

Objective

To estimate the long-term impact of early initiation of DMT on the income of MS patients.

Methods

In total, 3610 MS patients were included in this register-based cohort study. We measured the association between the time to treatment and the outcome, defined as time from treatment initiation to a 95% decrease in annual earnings compared to each patient´s baseline level. Additionally, the association between time to treatment and increase of social benefits (sickness absence, disability pension) was investigated. A Cox model was adjusted for sex, onset age, education, family situation, country of birth, living area, and disability.

Results

MS patients initiating treatment later had a higher risk of reaching the outcome- those who started treatment after 2 years from MS onset lost 95% of their earnings sooner (HR, 1.19; 95% CI, 1.04–1.37). Furthermore, risk to receive an annual compensation of SEK 100,000 (≈EUR 10,500) was higher for the delayed treatment group.

Conclusion

Early treatment initiation in MS is associated with better socioeconomic outcome, adding to previous studies showing benefits regarding disability.

Safety and efficacy of memantine for multiple sclerosis-related fatigue: A pilot randomized, double-blind placebo-controlled trial

BACKGROUND

Fatigue is one of the most common symptoms in patients with multiple sclerosis (MS). Currently, there is no approved medication for MS-related fatigue.

OBJECTIVE

In this study, we aim to evaluate the safety and efficacy of memantine for improving fatigue in patients with MS.

METHODS

This was a pilot randomized, double-blind, placebo-controlled clinical trial. Eligible patients with relapsing-remitting MS (RRMS) according to the McDonald criteria were randomized to receive either memantine (20 mg/day) or placebo and were assessed at baseline and three months after treatment. The change in the severity of fatigue was determined by the Modified Fatigue Impact Scale (MFIS).

RESULTS

Sixty-four patients were randomly allocated to the memantine (n = 32) and placebo (n = 32) groups. Sixteen patients in the memantine group and 24 patients in the placebo group completed the study. The mean [95% CI] absolute change in MFIS scores from baseline did not differ significantly between the memantine (-5.8 [-12.7 to 1.0]) and placebo (-4.0 [-10.6 to 2.7]) groups (between-group difference: -1.9 [-11.7 to 7.8], P = .702). No serious adverse events were reported, except for dizziness and sedation in four patients in the experimental arm, which resulted in discontinuation.

CONCLUSION

This trial failed to prove any clinical efficacy of memantine for the management of MS-related fatigue. Although memantine was generally well-tolerated, adverse events were among the major causes of dropout in this study.

Diagnosis-specific sickness absence and disability pension before and after multiple sclerosis diagnosis: An 8-year nationwide longitudinal cohort study with matched references

BACKGROUND

Multiple sclerosis (MS) typically onsets when of working age and may reduce work capacity. Previous studies have examined the risk of sickness absence (SA) and disability pension (DP) among MS patients, however, limited knowledge is available on whether MS patients have an excess risk for SA/DP when compared with the general population in Sweden. Moreover, no information exists on the actual diagnoses for SA and DP among MS patients and whether the patterns of SA/DP diagnoses differs to those without MS. We aimed to explore diagnosis-specific SA and DP among working-aged MS patients both before and after MS diagnosis, in comparison to the levels and distributions of SA and DP diagnoses of a matched reference group and analyze the risk of diagnosis-specific DP.

MATERIALS AND METHODS

Longitudinal Swedish register data of the 2567 MS patients diagnosed with MS in 2009-2012 when aged 25-59 and 10,268 population-based matched references (matched on sex, age, educational level, type of living area, and country of birth) were analysed regarding annual diagnosis-specific SA and DP in the four years before and four years after MS diagnosis. Annual differences in the mean numbers of SA and/or DP net days were calculated with 95% confidence intervals (CI). Hazard ratios (HR) with 95% CI from Cox proportional hazard models were used to compare risks for new all-cause and diagnosis-specific DP after MS diagnosis among the MS patients and references.

RESULTS

The mean SA/DP net days/year increased among MS patients over follow-up, due to both MS and other diagnoses. During follow-up, around 50% of MS patients had some SA/DP compared to 20% of references. The mean days of SA/DP among the MS patients compared to references increased from 10.3 more days (95% CI: 6.6-14.2) four years prior to MS diagnosis to 68.9 days (62.8-75.1) 4 years after MS diagnosis. Although most new DP among MS patients were due to MS, 15% were not. The adjusted HR for all-cause DP was 23.1 (18.1-29.5). MS patients also had higher risks of new DP due to all diagnoses except MS (HR 3.4; 2.4-4.8), musculoskeletal (HR 2.6; 1.1-6.0) and mental (HR 2.0; 1.1-3.6) diagnoses compared with references.

CONCLUSION

MS patients had higher levels of SA/DP days/year than the references, already 4 years before the MS diagnosis, and increasingly so thereafter. The excess of SA/DP prior to MS diagnosis could be related to MS onset. However, the excess of SA/DP days were not all due to MS diagnoses, even after being diagnosed with MS. MS patients had a higher risk of having a new DP after being diagnosed with MS in total, but also for diagnoses other than MS.

High work absence around time of diagnosis of multiple sclerosis is associated with fatigue and relapse rate

BACKGROUND

Multiple sclerosis (MS) is associated with high rates of disability pension and work absence. Little is known about work absence in early MS. The objectives of this study were (1) to assess the prevalence of work absence shortly after MS diagnosis, (2) to explore health-related quality of life (HRQoL) and disease impact in relation to work absence and (3) to investigate demographic and clinical factors that may be associated with high work absence.

METHODS

Patients with relapsing remitting (RRMS) or primary progressive MS (PPMS) were included shortly after MS diagnosis. We collected data on work absence due to MS in the year prior to inclusion, disability (Expanded Disability Status Scale), relapse rate, fatigue (Neurological Fatigue Index), health-related quality of life (HRQoL, 36-Item Short Form Survey) and disease impact (Multiple Sclerosis Impact Scale). For analysis, patients were divided in 2 groups: low work absence (<1 month) and high work absence (≥1 month). Data was analyzed using backward logistic regression techniques.

RESULTS

In total, 90 MS patients participated (80 RRMS, 10 PPMS, mean age = 39.3 years, median disease duration since diagnosis = 0.5 year). Work absence in the year prior to inclusion was reported by 66 patients (73.3%). High work absence of ≥ 1 month was reported by 41 patients (45.6%). Disability, gender, age, disease duration and education did not differ between groups. Patients with high work absence reported a lower HRQoL and higher disease impact compared to patients with low work absence. Backward regression analysis showed that high work absence is associated with being single/not married, fatigue and relapses. The strongest association was found for fatigue (highest fatigue vs. lowest fatigue level: OR total group = 7.8, RRMS = 15.8). In RRMS patients the second-strongest association was relapse rate (≥2 relapses in the past year vs. no relapses: OR 11.1).

CONCLUSION

Prevalence of work absence is high in early MS. Patients with high work absence report a lower HRQoL and a higher disease impact. High work absence is associated with being single/not married, fatigue and relapses. Interventions aimed at fatigue and prevention of relapses may help maintain employment in early MS.

Cognitive function predicts work disability among multiple sclerosis patients

Background

In multiple sclerosis various aspects of cognitive function can be detrimentally affected. More than that, patients´ employment and social functioning is likely to be impacted.

Objective

To determine whether work disability among multiple sclerosis patients could be predicted by the symbol digit modalities test.

Methods

A register-based cohort study was conducted. Individual data on work disability, operationalised as annual net days of sickness absence and/or disability pension were retrieved at baseline, when the symbol digit modalities test was performed, after one-year and 3-year follow-up for 903 multiple sclerosis patients. The incidence rate ratios for work disability were calculated with general estimating equations using a negative binomial distribution and were adjusted for gender, age, educational level, family composition, type of living area and physical disability.

Results

After one year of follow-up, the patients in the lowest symbol digit modalities test quartile were estimated to have a 73% higher rate of work disability when compared to the patients in the highest symbol digit modalities test quartile (incidence rate ratio 1.73, 95% confidence interval 1.42‒2.10). This estimate after 3-year follow-up was similar (incidence rate ratio 1.68, 95% confidence interval 1.40‒2.02).

Conclusion

Cognitive function is to a high extent associated with multiple sclerosis patients' future work disability, even after adjusting for other factors.

Modified Functional Walking Categories and participation in people with multiple sclerosis

BACKGROUND

Gait velocity influences the ability of a person to move in different outdoor or indoor contexts and has accordingly been classified through the Modified Functional Walking Categories (MFWC). Community ambulation in persons with multiple sclerosis (PwMS) may give information on their social and productive participation, as well as independence in household activities.

OBJECTIVES

To investigate factors associated with walking and mobility restrictions as classified by the Modified Functional Walking Categories (MFWC) and analyze the influence of disease characteristics, demographical and walking factors on participation in PwMS.

METHODS

155 PwMS attending two rehabilitation center were evaluated. Community ambulation was classified with the MFWC; participation was measured with the Community Integration Questionnaire (CIQ). MFWC and statistically significant variables associated with CIQ score were entered in a multivariate logistic model to assess the multiple relationships.

RESULTS

PwMS with a secondary progressive type of disease, longer disease duration and using walking aids were classified in the worse MFWC. Participation restrictions were more frequent in Limited Household (72.3%) and in Physiological Walkers (93.7%). The final multivariate model (p < 0.0001) showed that the use of a walking aid (OR = 2.59), being male (OR = 2.94) and older (OR = 1.06) increased the likelihood of having participation restrictions. The same variables predicted home participation; MFWC and age predicted productive participation while only age influenced social participation.

CONCLUSIONS

Modified Functional Walking Categories were associated with type of disease, disease duration, disability level and type of walking aid. The best clinical predictor of participation restriction was walking aid while walking categories only predicted productive participation.

The association of fatigue, pain, depression and anxiety with work and activity impairment in immune mediated inflammatory diseases

Impairment in work function is a frequent outcome in patients with chronic conditions such as immune-mediated inflammatory diseases (IMID), depression and anxiety disorders. The personal and economic costs of work impairment in these disorders are immense. Symptoms of pain, fatigue, depression and anxiety are potentially remediable forms of distress that may contribute to work impairment in chronic health conditions such as IMID. The present study evaluated the association between pain [Medical Outcomes Study Pain Effects Scale], fatigue [Daily Fatigue Impact Scale], depression and anxiety [Hospital Anxiety and Depression Scale] and work impairment [Work Productivity and Activity Impairment Scale] in four patient populations: multiple sclerosis (n = 255), inflammatory bowel disease (n = 248, rheumatoid arthritis (n = 154) and a depression and anxiety group (n = 307), using quantile regression, controlling for the effects of sociodemographic factors, physical disability, and cognitive deficits. Each of pain, depression symptoms, anxiety symptoms, and fatigue individually showed significant associations with work absenteeism, presenteeism, and general activity impairment (quantile regression standardized estimates ranging from 0.3 to 1.0). When the distress variables were entered concurrently into the regression models, fatigue was a significant predictor of work and activity impairment in all models (quantile regression standardized estimates ranging from 0.2 to 0.5). These findings have important clinical implications for understanding the determinants of work impairment and for improving work-related outcomes in chronic disease.

Trajectories of disposable income among people of working ages diagnosed with multiple sclerosis: a nationwide register-based cohort study in Sweden 7 years before to 4 years after diagnosis with a population-based reference group

OBJECTIVES

To describe how disposable income (DI) and three main components changed, and analyse whether DI development differed from working-aged people with multiple sclerosis (MS) to a reference group from 7 years before to 4 years after diagnosis in Sweden.

DESIGN

Population-based cohort study, 12-year follow-up (7 years before to 4 years after diagnosis).

SETTING

Swedish working-age population with microdata linked from two nationwide registers.

PARTICIPANTS

Residents diagnosed with MS in 2009 aged 25-59 years (n=785), and references without MS (n=7847) randomly selected with stratified matching (sex, age, education and country of birth).

PRIMARY AND SECONDARY OUTCOME MEASURES

DI was defined as the annual after tax sum of incomes (earnings and benefits) to measure individual economic welfare. Three main components of DI were analysed as annual sums: earnings, sickness absence benefits and disability pension benefits.

RESULTS

We found no differences in mean annual DI between people with and without MS by independent t-tests (p values between 0.15 and 0.96). Differences were found for all studied components of DI from diagnosis year by independent t-tests, for example, in the final study year (2013): earnings (-64 867 Swedish Krona (SEK); 95% CI-79 203 to -50 528); sickness absence benefits (13 330 SEK; 95% CI 10 042 to 16 500); and disability pension benefits (21 360 SEK; 95% CI 17 380 to 25 350). A generalised estimating equation evaluated DI trajectory development between people with and without MS to find both trajectories developed in parallel, both before (-4039 SEK; 95% CI -10 536 to 2458) and after (-781 SEK; 95% CI -6988 to 5360) diagnosis.

CONCLUSIONS

The key finding of parallel DI trajectory development between working-aged MS and references suggests minimal economic impact within the first 4 years of diagnosis. The Swedish welfare system was responsive to the observed reductions in earnings around MS diagnosis through balancing DI with morbidity-related benefits. Future decreases in economic welfare may be experienced as the disease progresses, although thorough investigation with future studies of modern cohorts are required.

The long-term impact of early treatment of multiple sclerosis on the risk of disability pension

Objective

The objective of this retrospective, observational study was to estimate the long-term impact of early treatment of multiple sclerosis (MS) on the risk of disability pension.

Methods

Our cohort comprised patients with MS in Sweden, identified in a nationwide disease-specific register (the Swedish Multiple Sclerosis Registry), who started treatment with a disease-modifying drug (DMD) between January 1, 2002, and December 31, 2012. We analyzed the association between time from onset of MS to treatment initiation and full-time disability pension using survival analysis.

Results

Our sample comprised 2477 patients. Unadjusted Kaplan–Meier failure functions showed that patients who started treatment within six months after onset had a lower risk of disability pension across follow-up compared with patients initiating therapy after 12 months. Outcomes from the univariate Cox proportional hazards model showed that time from onset to treatment initiation (in years) was significantly associated with disability pension (HR 1.03, p < 0.001). Outcomes from the multivariable Cox proportional hazards model showed that patients who started treatment within 6 months after onset had, on average, a 36% lower risk (HR 0.74, p = 0.010) of full-time disability pension during follow-up compared with patients starting treatment after 18 months when controlling for age, sex, marital status, university education, and prevalent comorbidities.

Conclusions

We show that early treatment with DMDs of MS is associated with a significantly reduced risk of disability pension. Our findings highlight the potential long-term benefits of early treatment of MS and should be helpful to inform ongoing discussion on the optimum medical management of the disease.

Electronic supplementary material

The online version of this article (10.1007/s00415-018-8764-4) contains supplementary material, which is available to authorized users.

Predictors for Employment Status in People With Multiple Sclerosis: A 10-Year Longitudinal Observational Study

OBJECTIVE

To identify predictors for employment status after 10 years in a cohort of people with multiple sclerosis (MS), with the aim to increase knowledge concerning factors present at an early stage that are important for working life and work-life balance.

DESIGN

A 10-year longitudinal observational cohort study.

SETTING

University hospital.

PARTICIPANTS

A consecutive sample of people with MS (N=154) of working age were included at baseline, of which a total of 116 people participated in the 10-year follow-up; 27 people declined participation and 11 were deceased.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Baseline data on personal factors and functioning were used as independent variables. Employment status 10 years after baseline, categorized as full-time work, part-time work, and no work, was used as the dependent variable. A generalized ordinal logistic regression was used to analyze the predictive value of the independent variables.

RESULTS

Predictors for full- or part-time work after 10 years were young age (P=.002), low perceived physical impact of MS (P=.02), fatigue (P=.03), full-time work (P=.001), and high frequency of social/lifestyle activities (P=.001) at baseline. Low perceived physical impact of MS (P=.02) at baseline also predicted full-time work after 10 years.

CONCLUSIONS

This study underlines the complexity of working life for people with MS, and indicates that it may be valuable to give more attention to the balance between working and private life, both in clinical practice and future research, to achieve a sustainable working life over time.

Neurologists dealing with sickness certification: Experiences of problems and need of competence

RATIONALE AND AIMS

Most studies on physicians' sickness certification practices include general practitioners (GP) while there hardly is any knowledge on this regarding neurologists although neurological diseases often involve work incapacity and need of sick leave.

AIM

The aim was to describe experiences among neurologists in Sweden concerning their work with sickness certification of patients.

METHOD

A cross-sectional study of 265 neurologists' responses in a nationwide survey regarding their work with sickness certification of patients was conducted.

RESULTS

The majority (81.5%) had sickness certification consultations at least once a week and a third experienced problems every week in handling sickness certification. Among the 251 who at least sometimes had sickness certification consultations, the following two aspects were experienced as very or fairly problematic: "assess the degree to which the reduced functional capacity limits a patient's capacity to perform his/her work assignments" (67.3%) and "make a long-term prognosis about the future work capacity of patients on sick leave" (60.5%). At least once a week, 78.7% experienced lack of time regarding managing patient-related aspects of the sickness certification task. Moreover, 21.8% considered sickness certification to be a work environmental problem, at least once a week. In all, 84% stated that they had a large or fairly large need for more competence concerning sickness certification tasks.

CONCLUSIONS

Sickness certification is a common task among neurologists, involving several problematic aspects related to, e.g., lack of competence in assessing function and work capacity and of time. There is a need for improvement.

Work disability before and after a major cardiovascular event: a ten-year study using nationwide medical and insurance registers

We examined the trajectories of work disability before and after IHD and stroke events. New IHD (n = 13521) and stroke (n = 7162) cases in 2006–2008 were retrieved from nationwide Swedish hospital records and their annual work disability days five years before and after the date of diagnosis were retrieved from a nationwide disability register. There was no pre-event differences in disability days between the IHD and stroke cases and five years prior to the event, they were close to those observed in the general population. In the first post-event year, the adjusted mean days increased to 83.9 (95% CI 80.6–86.5) in IHD; to 179.5 (95% CI 172.4–186.8) in stroke, a six-fold increase in IHD and 14-fold in stroke. Work disability leveled off among the IHD cases but not among those who had stroke. The highest disability levels for the fifth post-event year after a stroke event was associated with pre-existing diabetes (146.9), mental disorder (141.2), non-employment (137.0), and immigrant status (117.9). In a working-age population, the increase in work disability after a cardiovascular event decreases close to the pre-event level in IHD but remains particularly high after stroke; among patients with comorbid depression or diabetes, immigrants, and those not in employment.

Comparing costs of illness of multiple sclerosis in three different years: A population-based study

BACKGROUND

Little is known about changes in the costs of illness (COI) among multiple sclerosis (MS) patients during recent years.

OBJECTIVES

To compare the COI among MS patients and matched controls in 2006, 2009, and 2012, respectively, indicating the costs attributable to the MS disease.

METHODS

Three cross-sectional datasets were analyzed, including all MS patients in Sweden aged 20-60 years and five matched controls for each of them. The analyses were based on 10,531 MS patients and 52,655 matched controls for 2006, 11,722 and 58,610 individuals for 2009, and 12,789 and 63,945 for 2012. Nationwide registers, including prescription drug use, specialized healthcare, sick leave, and disability pension, were linked to estimate the prevalence-based COI.

RESULTS

Adjusted for inflation, the average difference in COI between MS patients and matched controls were Swedish Krona (SEK) 243,751 (95% confidence interval: SEK 239,171-248,331) in 2006, SEK 238,971 (SEK 234,516-243,426) in 2009, and SEK 225,923 (SEK 221,630-230,218) in 2012. The difference in indirect costs were SEK 170,502 (SEK 166,478-174,525) in 2006, SEK 158,839 (SEK 154,953-162,726) in 2009, and SEK 141,280 (SEK 137,601-144,960) in 2012.

CONCLUSION

The inflation-adjusted COI of MS patients was lower in 2012 than in 2006, in particular regarding indirect costs.

Symptomatic treatment in multiple sclerosis-interim analysis of a nationwide registry

OBJECTIVE

To analyze symptomatic treatment in patients with multiple sclerosis (MS).

BACKGROUND

Multiple sclerosis is a chronic inflammatory disease of the central nervous system, with accumulating disability symptoms like spasticity, voiding disorders, depression, and pain might occur.

MATERIAL AND METHODS

The nationwide German MS registry was initiated 2001 under guidance of the German MS society (Deutsche MS Gesellschaft). This study was performed as an interim analysis to lay foundation for future work on this topic. A subcohort of 5113 patients was assessed for this interim analysis. The mean age of the patients was 45.3 years; mean EDSS was 4.2. More than two-third of the enrolled patients were females (70.9%).

RESULTS

Most frequent symptoms were fatigue (60%), followed by spasticity (52.5%) and voiding disorders (51.7%). The likelihood of treatment was highest for epileptic disorders (68.8%), spasticity (68.5%), pain (60.7%), and depression (58.9%). Multivariate regression analysis showed that retirement was the strongest factor predictive for antispastic treatment (β=.061, P=.005).

CONCLUSION

Almost all patients in this analysis suffer from symptoms due to advanced MS. Treatment for the various symptoms differed tremendously. The likelihood of treatment correlated with the availability of effective therapeutic agents. Clinicians should put more awareness on MS symptoms. Symptomatic treatment may improve quality of life.

The External Validity of Mapping MSIS-29 on EQ-5D Among Individuals With Multiple Sclerosis in Sweden

Background: Mapping can be performed to predict utility values from condition-specific measures when preference-based measures are absent. A previously developed algorithm that predicts EQ-5D-3L index values from the Multiple Sclerosis Impact Scale (MSIS-29) has not yet been externally validated. Aim: To examine the external validity of a previously developed mapping algorithm by testing the accuracy of predicting EQ-5D-3L index values from MSIS-29 among multiple sclerosis (MS) patients in Sweden. Methods: Cross-sectional individual-level data were collected from population-based Swedish registers between 2011 and 2014. Health-related quality of life was assessed through MSIS-29 and EQ-5D-3L at one point in time among 767 individuals with known disability level of MS. A previously developed mapping algorithm was applied to predict EQ-5D index values from MSIS-29 items, and the predictive accuracy was assessed through mean absolute error and root mean square error. Results: When applying the algorithm, the predicted mean EQ-5D-3L index value was 0.77 compared to the observed mean index value of 0.75. Prediction error was higher for individuals reporting EQ-5D values <0.5 compared to individuals reporting EQ-5D values ≥0.5. Mean absolute error (0.12) and root mean square error (0.18) were smaller or equal to the prediction errors found in the original mapping study. Conclusion: The mapping algorithm had similar predictive accuracy in the two independent samples although results showed that the highest predictive performance was found in groups with better health. Varied predictive accuracy in subgroups is consistent with previous studies and strategies to deal with this are warranted.

How does work disability of patients with MS develop before and after diagnosis? A nationwide cohort study with a reference group

OBJECTIVES

We compared work disability of patients with multiple sclerosis (MS) from 5 years before with 5 years after diagnosis, with that of matched controls, and analysed whether progression in work disability among patients with MS was associated with sociodemography.

DESIGN

Population-based cohort study.

SETTING

The adult Swedish general population.

PARTICIPANTS

Residents aged 24-57 diagnosed with MS (n=3685) in 2003-2006 and 18 425 matched controls without MS.

PRIMARY AND SECONDARY OUTCOME MEASURES

Annual net days of sickness absence (SA) and disability pension (DP), used as a proxy for work disability, followed from 5 years before to 5 years after diagnosis (ie, T-5-T+5). For patients with MS, regression was used to identify sociodemographic factors related to progression in work disability.

RESULTS

Work disability of patients with MS increased gradually between T-5 and T-1 (mean: 46-82 days) followed by a sharp increase (T+1, 142 days), after which only a marginal increase was observed (T+5, 149 days). The matched controls had less work disability, slightly increasing during the period to a maximum of ∼40 days. Men with MS had a sharper increase in work disability before diagnosis. High educational level was associated with less progression in work disability before and around diagnosis.

CONCLUSIONS

Patients with MS had more work disability days also 5 years before diagnosis. Several sociodemographic variables were associated with the absolute level and the progression in SA and DP.

Sick leave and disability pension before and after diagnosis of multiple sclerosis

Background:

Multiple sclerosis (MS) is associated with considerable morbidity and serious disability, but little is known of the long-term impact of the disease on work ability.

Objectives:

To assess sick leave (short-term absence) and disability pension (long-term absence) before and after diagnosis of MS.

Methods:

Patients with MS in Sweden were identified in a nationwide disease-specific register and matched with general population controls. Sick leave and disability pension were measured before and after index (i.e. the MS diagnosis date).

Results:

The final sample comprised 6092 patients and 60,345 controls (mean age 39 years; 70% female). The mean annual prevalence of sick leave ranged from 12% the first year after index to 23% after 11 years among patients and from 13% to 13% among controls. Corresponding estimates for disability pension were 12% and 55% for patients and 7% and 9% for controls. Significant differences in sick leave were observed up to 15 years before index and 3 years for disability pension.

Conclusion:

Patients with MS in Sweden have elevated levels of sick leave and disability pension up to 15 years before disease diagnosis. Our results highlight the burden of disease on affected patients and society and underscore the substantial unmet medical need.

Fatigue and depression in multiple sclerosis: pharmacological and non-pharmacological interventions

Multiple sclerosis (MS) is a neuroinflammatory condition with a prominent progressive neurodegenerative facet that typically affects young- or middle-aged adults. Although physical disabilities have been in the foreground by being easier to assess, there is an increasing interest in mental disabilities and psychiatric co-morbidities, which have a disproportionally high impact on important outcome measures such as quality of life and occupational disability. In particular, cognitive impairment, depression and mental fatigue, which mutually interact with each other, seem to be of importance in this context. In recent decades, major efforts have been invested in developing more effective disease modulatory treatments. This has resulted in novel therapeutic options and awareness of the importance of early intervention. In comparison, good quality and adequately powered studies on symptomatic treatments of fatigue and psychiatric co-morbidities in MS are rare, and awareness of treatment options is much lower. We here review the existing evidence base for symptomatic treatment of fatigue and depression in MS patients. With regard to fatigue, off-label prescription of alertness improving drugs is common, in spite of all but absent evidence of efficacy. In contrast, a number of smaller studies suggest that physical exercise and fatigue management courses may have some clinical benefit. Very few studies have addressed the efficacy of antidepressants and non-pharmaceutical interventions specifically in MS patients. Therefore, treatment guidelines largely rely on data from non-MS populations. In the future, there is a strong motive to direct additional resources to the study of these important aspects of MS.

Prescribed psychiatric medication among multiple sclerosis patients before and after disability pension: a register study with matched controls

BACKGROUND

Many multiple sclerosis (MS) patients of working ages have psychiatric comorbidity, and 60 % are on disability pension (DP). It is unknown how DP is associated with MS patients' mental health. The objective of this study was to investigate the association between prescriptions of psychiatric medication and time before and after receiving full-time DP in MS patients compared with matched controls.

METHODS

Nationwide Swedish registers were used to identify 3836 MS patients who were granted DP in 2000-2012 and 19,180 DP controls matched on socio-demographic variables by propensity scores. Patients and controls were organized in groups by year granted DP. Adjusted odds ratios (ORs) with 95 % confidence intervals (CIs) were calculated for being prescribed selective serotonin reuptake inhibitors (SSRIs), benzodiazepines, or sleeping agents in 2006.

RESULTS

Both patients and controls, who were not yet on DP in the study year of 2006, had lower OR compared with those who were granted DP in the same year. The OR increased when being closer to DP. MS patients, who had been granted DP 5-6 years earlier, had a higher risk for prescription of benzodiazepines (OR 1.72; 95 % CI 1.16-2.57) than controls (OR 1.14; 95 % CI 1.14-1.18). These patients also had a higher risk for SSRI prescription when compared directly with controls (OR 1.76; 95 % CI 1.44-2.15).

CONCLUSIONS

MS patients have substantially higher odds ratios for being prescribed psychiatric drugs after DP than other disability pensioners. Further research on the association of DP with the mental health of MS patients is warranted.

Earnings and Financial Compensation from Social Security Systems Correlate Strongly with Disability for Multiple Sclerosis Patients

Background

Multiple sclerosis (MS) patients earn lower incomes and receive higher benefits. However, there is limited knowledge of how this is correlated with their disability.

Objective

To elucidate sources and levels of income among MS patients with different disability, assessed with the Expanded Disability Status Scale.

Methods

A total of 7929 MS patients aged 21–64 years and living in Sweden in 2010 were identified for this cross-sectional study. Descriptive statistics, logistic and truncated linear regression models were used to estimate differences between MS patients regarding earnings, disability pension, sickness absence, disability allowance, unemployment compensation, and social assistance.

Results

The average level of earnings was ten times lower and the average level of health- related benefits was four times higher when comparing MS patients with severe and mild disability. MS patients with severe disability had on average SEK 166,931 less annual income from earnings and SEK 54,534 more income from benefits compared to those with mild disability. The combined average income for MS patients was 35% lower when comparing patients in the same groups. The adjusted risk ratio for having earnings among MS patients with severe disability compared to the patients with mild disability was 0.33 (95% CI 0.29–0.39), while the risk ratio for having benefits was 1.93 (95% CI 1.90–1.94).

Conclusions

Disease progression affects the financial situation of MS patients considerably. Correlations between higher disability and patient income were observed, suggesting that earnings and benefits could be used as measures of MS progression and proxies of disability.

Is disability pension a risk indicator for future need of psychiatric healthcare or suicidal behavior among MS patients- a nationwide register study in Sweden?

BACKGROUND

Mental disorders and suicidal behavior are common in patients with multiple sclerosis (MS), they also carry a higher risk of disability pension (DP). Our aim was to investigate if DP and other factors are associated with psychiatric disorders and suicidal behavior among MS patients, and whether DP is a stronger risk indicator among certain groups.

METHOD

A prospective population-based cohort study with six-year follow-up (2005-2010), including 11 346 MS patients who in 2004 were aged 16-64 and lived in Sweden. Incidence rate ratios (IRR) with 95 % confidence intervals (CI) were calculated.

RESULTS

MS patients on DP had a modestly higher risk of requiring psychiatric healthcare, IRR: 1.36 (95 % CI: 1.18-1.58). MS patients with previous psychiatric healthcare had a higher IRR for both psychiatric healthcare and suicidal behavior; 2.32 (2.18-2.47) and 1.91 (1.59-2.30), respectively. DP moderated the association between sex and psychiatric healthcare, where women on DP displayed higher risk than men, X(2) 4.74 (p = 0.03).

CONCLUSION

The findings suggest that losing one's role in work life aggravates rather than alleviates the burden of MS, as MS patients on DP seem to have a higher need for psychiatric healthcare, especially among women; which calls for extra awareness among clinicians.

Trends of diagnosis-specific work disability after newly diagnosed diabetes: a 4-year nationwide prospective cohort study

OBJECTIVE

We examined trends of diagnosis-specific work disability after newly diagnosed diabetes, comparing individuals with diabetes with those without diabetes, and identified the subgroups with the highest levels of work disability.

RESEARCH DESIGN AND METHODS

The register data of diabetes medication and in- and outpatient hospital visits were used to identify all recorded new diabetes cases among the population aged 25-59 years in Sweden in 2006 (n = 14,098). Data for a 4-year follow-up of ICD-10 physician-certified sickness absence and disability pension days (2007‒2010) were obtained from the Swedish Social Insurance Agency. Comparisons were made using a random sample of the population without recorded diabetes (n = 39,056).

RESULTS

The most common causes of work disability were mental and musculoskeletal disorders; diabetes as a reason for disability was rare. Most of the excess work disability among people with diabetes compared with those without diabetes was owing to mental disorders (mean difference adjusted for confounding factors 18.8‒19.8 compensated days/year), musculoskeletal diseases (12.1‒12.8 days/year), circulatory diseases (5.9‒6.5 days/year), diseases of the nervous system (1.8‒2.0 days/year), and injuries (1.0‒1.2 days/year). The disparity in mental disorders first widened and then narrowed, while the difference in other major diagnostic categories was stable over 4 years. The highest rate (45.3 days/year) was found among people who had diabetes, lived alone, and were disabled from work owing to mental disorders.

CONCLUSIONS

The increased risk of work disability among those with diabetes is largely attributed to comorbid mental, musculoskeletal, and circulatory diseases. It is important to monitor comorbid conditions and take account of socioeconomic disadvantage.

Heterogeneity of sickness absence and disability pension trajectories among individuals with MS

Background

The variability of progression of multiple sclerosis (MS) suggests that MS is a heterogeneous entity.

Objective

The objective of this article is to determine whether sickness absence (SA) and disability pension (DP) could be used to identify groups of patients with different progression courses.

Methods

We analyzed mean-annual net months of SA/DP, five years prior to MS diagnosis, until the year of diagnosis, and five years after for 3543 individuals diagnosed 2003–2006, by modeling trajectory subgroups.

Results

Five different groups were identified, revealing substantial heterogeneity among MS patients. Before diagnosis, 74% had a flat trajectory, while the remaining had a sharply increasing degree of SA/DP. After diagnosis, 95% had a flat or marginally increasing trajectory, although at various SA/disability pension (DP) levels, whereas a small group of 5% had decreasing SA/DP. A majority had few or no SA/DP months throughout the 11-year study period. Higher age and a lower educational level were associated with an unfavorable trajectory (p values <0.01).

Conclusions

There’s a considerable heterogeneity of MS progression in terms of SA/DP. Compared with other measures of disability, sickness-absence and disability pension offer a continuous variable that can be assigned to every individual for each time period without missing data. To what extent the SA/DP measure reflects classical MS outcome-measures as well as how correlated it is with co-morbidities and working-conditions needs to be investigated further.

Peripheral nerve repair: a hot spot analysis on treatment methods from 2010 to 2014

Therapeutic strategies for neurological deficits and for promoting nerve regeneration after peripheral nerve injuries have received much focus in clinical research. Advances in basic research in recent years have increased our understanding of the anatomy of peripheral nerves and the importance of the microenvironment. Various new intervention methods have been developed, but with varying effectiveness. In the present study, we selected 911 papers on different repair methods for peripheral nerve injury from the Web of Science and indexed in the Science Citation Index from 2010 to 2014. We quantitatively examine new repair methods and strategies using bibliometrics, and we discuss the present state of knowledge and the problems and prospects of various repair methods, including nerve transfer, neural transplantation, tissue engineering and genetic engineering. Our findings should help in the study and development of repair methods for peripheral nerve injury.

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.

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.

Psychiatric diagnoses, medication and risk for disability pension in multiple sclerosis patients; a population-based register study

BACKGROUND

Psychiatric comorbidity is common among multiple sclerosis (MS) patients. The majority of MS patients of working ages are on disability pension. The aims of this study were to chart the prevalences of psychiatric diagnoses and medications among MS patients of working ages, and to investigate their association with the risk for future disability pension.

METHODS

This nationwide, population-based prospective cohort study includes 10,750 MS patients and 5,553,141 non-MS individuals who in 2005 were aged 17-64 years. Psychiatric diagnoses and medications were identified using nationwide registers. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated adjusting for socio-demographics. Furthermore, a survival analysis with five-year follow-up was performed among the 4,571 MS patients not on disability pension in 2005, with psychiatric diagnoses and medication as risk factors, and disability pension as the outcome.

RESULTS

Among MS patients, 35% had been prescribed psychiatric medication compared to 10% of non-MS individuals, adjusted OR 3.72 (95% CI 3.57 to 3.88). Ten percent of MS patients had received a psychiatric diagnosis, compared to 5.7% of non-MS individuals, OR 1.82 (95% CI 1.71 to 1.94). Serotonin reuptake inhibitors (SSRIs), were the most commonly prescribed drugs (17%) among MS patients, while depression (4.8%) was the most common psychiatric diagnosis. In the survival analysis, MS patients with any psychiatric diagnosis had a hazard ratio (HR) of 1.83 (95% CI 1.53 to 2.18) for disability pension compared to other MS patients. MS patients with any psychiatric drug prescription had a HR for disability pension of 2.09 (95% CI 1.84 to 2.33).

CONCLUSION

Psychiatric diagnoses and medications are common among MS patients and adversely affect risk for disability pension. This highlights the importance of correct diagnosis and management of psychiatric comorbidity, in a clinical as well as in a societal perspective.

Co-morbidities increase the risk of disability pension among MS patients: a population-based nationwide cohort study

BACKGROUND

Multiple sclerosis (MS) is a chronic and often disabling disease. In 2005, 62% of the MS patients in Sweden aged 16-65 years were on disability pension. The objective of this study is to investigate whether the presence of common co-morbidities increase MS patients' risk for disability pension.

METHODS

This population-based cohort study included 4 519 MS patients and 4 972 174 non-MS patients who in 2005 were aged 17-64 years, lived in Sweden, and were not on disability pension. Patients with MS were identified in the nationwide in- and outpatient registers, while four different registers were used to construct three sets of measures of musculoskeletal, mental, and cardiovascular disorders. Time-dependent proportional hazard models with a five-year follow up were performed, adjusting for socio-demographic factors.

RESULTS

All studied disorders were elevated among MS patients, regardless of type of measure used. MS patients with mental disorders had a higher risk for disability pension than MS patients with no such co-morbidities. Moreover, mental disorders had a synergistic influence on MS patients' risk for disability pension. These findings were also confirmed when conducting sensitivity analyses. Musculoskeletal disorders appeared to increase MS patients' risk for disability pension. The results with regard to musculoskeletal disorders' synergistic influence on disability pension were however inconclusive. Cardiovascular co-morbidity had no significant influence on MS-patients' risk for disability pension.

CONCLUSIONS

Co-morbidities, especially mental disorders, significantly contribute to MS patients' risk of disability pension, a finding of relevance for MS management and treatment.