Pain and disability retirement: a prospective cohort study.

This study examined the association of pain with subsequent disability retirement due to all causes as well as musculoskeletal diseases, mental disorders, and a heterogeneous group of other diseases and to study whether pain has an effect of its own after taking into account long-standing illness, physician-diagnosed diseases, working conditions, and occupational class, which are the key factors affecting disability retirement. The data consisted of the Helsinki Health Study baseline survey linked to national pension register data (n=6258). Mean follow-up time was 8.1 years. The data included 594 disability retirement events. Pain (acute or chronic) was stratified by long-standing illness (yes/no). Cox regression analysis was performed. Chronic pain without and with co-occurring long-standing illness was strongly associated with all types of disability retirement outcomes, but the associations were particularly strong for disability retirement due to musculoskeletal diseases. The associations remained even when further adjusted for physician diagnosed chronic conditions and diseases, psychosocial and physical working conditions, and occupational class. Associations for acute pain were also found, but they were clearly weaker than those of chronic pain. Chronic pain contributes to disability retirement. Prevention and effective treatment of chronic pain may help prevent early retirement due to disability.

Different domains of health functioning as predictors of sickness absence--a prospective cohort study.

OBJECTIVES: The aim of this study was to examine different domains of health functioning as predictors of sickness absence. METHODS: The Short Form 36 (SF-36) is one of the best known instruments measuring various domains of physical and mental health functioning. A questionnaire including the SF-36 was mailed to 40-60-year-old employees of the City of Helsinki in 2000-2002. For the subsequent three years, sickness absence episodes >2 weeks were derived from the employer's register. The predictive ability of the eight subscales and two component summaries of the SF-36 were compared using regression methods and receiver operating characteristic (ROC) curve analysis. RESULTS: All eight SF-36 subscales and the two component summaries predicted the occurrence of sickness absence over the follow-up period. Among women, bodily pain was the strongest predictor, with 1 standard deviation increase in bodily pain increasing the occurrence of sickness absence by 77% [95% confidence interval (95% CI) 68-86%]. Role limitations due to emotional problems were the weakest predictor of sickness absence (29%, 95% CI 23-36%). Among men, the results were similar to those of women. In both genders, the area under the ROC curve was largest for bodily pain, general health, and physical functioning and lowest for mental health and role limitation due to emotional problems. CONCLUSIONS: The subscales measuring physical domains of functioning were more strongly associated with sickness absence than the mental subscales. In particular, ability to perform daily activities, pain, and general health were important predictors of sickness absence >2 weeks.

Pain and clinical findings in the low back: a study of industrial employees with 5-, 10-, and 28-year follow-ups.

Little is known about the relationships of clinical findings in the low back with low back pain (LBP) in the normal working population. We studied whether physiotherapist's findings in the low back were associated with local and radiating LBP among a cohort (n=902) of employees in the engineering industry. A systematic non-proportional sample was drawn in strata by age, gender, and occupational class. The non-proportionality aimed at increasing sample size in smaller strata. Physiotherapists performed the straight-leg raising test (SRL), and made assessments of the fingertip-to-floor distance and pain in palpation of the lumbar interspinous spaces. The variables on pain at the interspinous spaces and the SRL tests were entered in cluster analysis. Three clusters emerged: no, minor, and severe clinical findings. In logistic regression analysis at baseline, limited forward flexion and the clinical findings cluster variable were associated with local and, particularly, radiating LBP. Follow-ups of the occurrence of local and radiating LBP at 5, 10, and 28 years from baseline were made. At the 5-year follow-up among subjects with no radiating LBP at baseline, the OR of radiating LBP for the clusters of minor and severe clinical findings compared to no findings were 2.7 (95% CI 1.4-5.1) and 3.8 (2.0-6.9), respectively, adjusted for age, gender, and occupational class. At the 10-year follow-up, the latter cluster predicted new reports of radiating LBP (1.9; 1.0-3.1) and of local LBP (4.1; 1.9-9.0, among subjects with no local LBP at baseline), similarly adjusted. No associations between limited forward flexion and new cases of LBP were observed. Thus, membership in clusters with different levels of findings in simple clinical measurements predicted new reports of radiating LBP, in particular, among employees. The generalizability of the results may be limited due to the characteristics of the sampling.