The influence of work-related exposures on the prognosis of neck/shoulder pain

• Published in: European spine journal 2007-12, Vol.16 (12), p.2083-2091
• Main Authors: Grooten, Wilhelmus Johannes Andreas, Mulder, Marie, Josephson, Malin, Alfredsson, Lars, Wiktorin, Christina
• Format: Article
• Language: English
• Subjects: Adult; Age Distribution; Case-Control Studies; Cohort Studies; Cumulative Trauma Disorders - epidemiology; Cumulative Trauma Disorders - physiopathology; disability; epidemiology; Female; Humans; Male; MEDICIN; MEDICINE; Middle Aged; Neck Pain - epidemiology; Neck Pain - physiopathology; Occupational Diseases - epidemiology; Occupational Diseases - physiopathology; Occupational Exposure - statistics & numerical data; occupational health; Occupations - statistics & numerical data; Original; Prognosis; Prospective Studies; Risk Factors; Sex Distribution; Shoulder Joint - injuries; Shoulder Joint - physiopathology; Shoulder Pain - epidemiology; Shoulder Pain - physiopathology; Sweden - epidemiology; Work - statistics & numerical data
• ISSN: 0940-6719; 1432-0932; 1432-0932
• DOI: 10.1007/s00586-007-0481-0

To determine associations between work-related exposures and the prognosis of self-reported neck/shoulder pain. This prospective cohort study was based on 803 working subjects who reported neck/shoulder pain at baseline. The proportion of subjects who 5-6 years later were symptom-free was calculated. Data concerning work-related biomechanical, psychosocial, and organizational exposures were collected at baseline. The Cox regression analyses were used to calculate the relative chances (RC) of being symptom-free at the end of the study for single exposures, and also for up to three simultaneous work-related exposures. Adjustments were made for sex and age. Only 36% of the subjects were symptom-free 5-6 years later. The relative chance for being symptom-free at the end of the study was 1.32 (95% CI = 0.99-1.74) for subjects who were exposed to sitting > or =75% of the working time and 1.53 (95% CI = 1.02-2.29) for subjects who were exposed to job strain, i.e., the combination of high demands and low decision latitude. The relative chance of being symptom-free at the end of the study was 0.61 (95% CI = 0.40-0.94) for subjects with at least two out of three simultaneous biomechanical exposures at work; manual handling, working with the hands above shoulder level, and working with vibrating tools. In a heterogeneous population with moderate nonspecific neck/shoulder pain, sedentary work enhanced the chance of being symptom-free 5-6 years later, whereas simultaneous exposures to at least two of manual handling, working with hands above shoulder level and working with vibrating tools were associated with a lower chance of being symptom-free at the end of the study. This could imply that subjects with neck/shoulder pain should avoid such simultaneous exposures.