Biomechanical and Psychosocial Work Exposures and Musculoskeletal Symptoms amongVineyard Workers: Christophe Bernard, et al. CCMSA, France-Objectives: This study explored the associations between biomechanical and psychosocial work factors and musculoskeletal symptoms in vineyard workers. Methods: This crosssectional study was based on a random sample of 2,824 male and 1,123 female vineyard workers in France. Data were collected using a self-administered questionnaire. Neck/shoulder, back and upper and lower extremity symptoms were evaluated using the Nordic questionnaire. Biomechanical exposures included 15 tasks related to vineyard activities. Psychosocial work factors included effort-reward imbalance and overcommitment, measured using the effort-reward imbalance model, and low job control and insufficient material means. Statistical analysis was performed using logistic regression analysis, and the results were adjusted for age, body mass index, educational level, work status and years in vineyard. Results: Pruning-related factors increased the risk of upper extremity pain for both genders, of back pain for men and of neck/shoulder and lower extremity pain for women. Driving increased the risk of neck/shoulder and back pain among men. Psychosocial work factors, which were insufficient material means, overcommitment (both genders), effort-reward imbalance (men) and low j o b c o n t r o l ( w o m e n ) , w e r e a s s o c i a t e d w i t h musculoskeletal symptoms, back and upper extremity pain for both genders and neck/shoulder and lower extremity pain for men. Conclusions: These results underlined that both biomechanical and psychosocial work factors may play a role in musculoskeletal pain among vineyard workers. Prevention policies focusing on both biomechanical and psychosocial work exposures may be useful to prevent musculoskeletal symptoms. (J Occup Health 2011; 53: 297-311) Key words: Biomechanical exposures, Musculoskeletal symptoms, Psychosocial work factors, Vineyard workers Musculoskeletal symptoms are considered to be a major occupational health issue especially among blue collar and service workers. The prevalence of these symptoms may be high, as the prevalence of back or neck/shoulder pain may be up to 40% 1) and often more in some sectors of work. These disorders lead to high human, social and economic costs (health care, disability, sickness absence, early retirement, etc.) [2][3][4] . In addition, musculoskeletal disorders are one of the leading occupational diseases in France and in many other industrialized countries. The etiology of these disorders is probably multifactorial and involves both biomechanical and psychosocial work exposures. However, whereas biomechanical factors are recognized as well-known risk factors, the etiological role of psychosocial work factors may be more controversial, as showed in literature reviews that provided little evidence for this role [5][6][7] . These reviews also underlined the lack of adjustment for biomechanical factors in the published s...