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Journal of Occupational & Environmental Medicine:
doi: 10.1097/JOM.0b013e31821576dd
ORIGINAL ARTICLES: CME Available for this Article at

Health-Related and Sociodemographic Risk Factors for Disability Pension due to Low Back Disorders: A 30-Year Prospective Finnish Twin Cohort Study

Pietikäinen, Sanna MSc; Silventoinen, Karri PhD; Svedberg, Pia PhD; Alexanderson, Kristina PhD; Huunan-Seppälä, Antti MD; Koskenvuo, Karoliina PhD; Koskenvuo, Markku PhD, MD; Kaprio, Jaakko PhD, MD; Ropponen, Annina PhD, EurErg

Continued Medical Education
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Objectives: To investigate health-related and sociodemographic risk factors for disability pensions (DP) due to low back disorders (LBD).

Methods: Questionnaire data in 1975 of the Finnish Twin Cohort Study with record linkage to information on DP due to LBD from the official pension registers during follow-up 1975 to 2004 was analyzed with Cox proportional hazard models.

Results: Musculoskeletal pain (Hazards Ratio [HR] = 2.36 to 2.39; 95% CI 1.97 to 2.88), smoking (HR = 1.82; 1.49 to 2.22), frequent analgesics use (HR = 1.67; 1.38 to 2.02), and presence of other chronic disease (HR = 1.44; 1.22 to 1.70) increased the risk for DP due to LBD. Years of education decreased the risk (HR = 0.81; 0.77 to 0.85). Associations remained significant when adjusted for familial background.

Conclusions: Health-related and sociodemographic risk factors for DP due to LBD can be identified early in life, and they seem independent from familial effects.

©2011The American College of Occupational and Environmental Medicine


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