Impact of Repetitive Manual Materials Handling and Psychosocial Work Factors on the Future Prevalence of Chronic low-back Pain among Construction Workers

Ute Latza；Annette Pfahlberg；Olaf Gefeller

accelerated failure time ； bricklayer ； cohort studies ； musculoskeletal diseases ； occupational diseases ； risk and rate advancement periods ； risk factors

Scandinavian Journal of Work, Environment & Health

28卷5期（2002 / 09 / 01）

314 - 323

英文

Objectives This study investigated the influence of manual stone and brick handling and psychosocial work factors on the risk of chronic low-back pain and describes the impact in terms of risk advancement period. Methods The Hamburg Construction Worker Study included a longitudinal study among 488 male construction workers. Adjusted prevalence ratios (PR) of chronic low-back pain (＞3 months during the last 12 months) according to self-reported worktasks in the baseline survey were estimated with the Cox proportional hazards model. Results The 1-year prevalence of chronic low-back pain was 15.4%. Workers with chronic low-back pain in the baseline survey had a higher risk of such pain during the follow-up (PR 4.07, 95% CI 2.18-7.59). The prevalence in association with laying large lime sandstones for ＞2 hours per shift (PR 1.80, 95% CI 1.04-3.14) further increased after adjustment for job category (PR 2.69, 95% CI 1.25-5.78), and it advanced the risk by a risk advancement period of 18 years (95% CI 4-39). Workers with low satisfaction with their work achievements had a higher prevalence of chronic low-back pain (PR 2.07, 95% CI 1.10-3.88). Similar risk estimates were observed in the subgroup without chronic low-back pain in the baseline survey. A strong effect of time pressure was only present for these workers (high: PR 6.30, 95% CI 1.41-28.21). Conclusions The results suggest that repetitive work involving bent positions and the manual manipulation of heavy stones increases the risk of future chronic low-back pain. For risk communication, the notion that a 40- year-old construction worker laying large sandstones has the same risk as an unexposed 58-year-old construction worker may be more informative.