• Sanna Kääriä, Päivi Leino-Arjas, Ossi Rahkonen, Jouni Lahti, Eero Lahelma, and Mikko Laaksonen.
• Department of Public Health, University of Helsinki, Helsinki, Finland. sanna-mari.kaaria@helsinki.fi
• Eur J Pain. 2011 Jul 1;15(6):584-90.

ObjectiveTo study the effects of occupational class, physical and psychosocial working conditions, health behaviours, and pain in the low back and the neck on sciatic pain among middle-aged employees.MethodsThe participants were municipal employees without previous sciatica, aged 40, 45, 50, 55, and 60 years at baseline (n=5261, 80% women). Sciatica was defined as low back pain radiating to the calf or the foot. Data on occupational class, physical and psychosocial working conditions, body mass index, smoking, leisure-time physical activity, neck pain, local low back pain, and sciatica were obtained from baseline questionnaire surveys in 2000-2002. The question on sciatica was repeated in a follow-up survey in 2007. Logistic regression analysis was used.ResultsIn women, manual occupational class (OR 1.3; 95% CI 1.0-1.6 compared with managers/professionals), overweight (1.3; 1.1-1.5), obesity (1.4; 1.1-1.7), smoking (1.5; 1.2-1.7), low leisure-time physical activity (1.3; 1.0-1.7), previous acute (1.5; 1.3-1.7) and chronic (1.5; 1.1-2.0) local low back pain, and acute (1.20; 1.0-1.4) and chronic (1.5;1.2-1.9) neck pain predicted the onset of sciatica in a multivariable model. In men, semi-professionals (1.5; 1.1-2.1) and manual workers (2.0; 1.4-2.8) had an increased risk compared with managers/professionals; also acute (1.5; 1.2-2.0) and chronic (2.1; 1.2-3.9) local low back pain predicted sciatica.ConclusionsManual occupational class in both genders and semi-professional occupations in men, unhealthy behaviours and previous pain both in the neck and the lower back predicted sciatica, while physical and psychosocial working conditions had no independent effect.Copyright © 2010 European Federation of International Association for the Study of Pain Chapters. Published by Elsevier Ltd. All rights reserved.

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