Table 3 The adjusted associations between work-related physical exposures at baseline and a subsequent chronic shoulder disorder, stratified by age at baseline
Chronic shoulder disorder at follow-up
30 to 45 years (n = 552)>45 years (n = 300)
OR (95% CI)pOR (95% CI)p
Work-related physical exposures
Lifting heavy loads0.770.003
    no1.01.0
    Yes1.1 (0.5 to 2.5)3.1 (1.5 to 6.5)
Working in awkward postures0.140.22
    No1.01.0
    Yes1.8 (0.8 to 3.8)1.6 (0.8 to 3.4)
Work involving vibration0.120.06
    No1.01.0
    Yes2.4 (0.8 to 6.7)2.8 (1.0 to 7.6)
Work involving repetitive movements0.040.05
    No1.01.0
    Yes2.4 (1.1 to 5.4)2.3 (1.0 to 4.9)
Work paced by machine0.460.68
    No1.01.0
    Yes0.5 (0.1 to 3.8)1.4 (0.5 to 4.4)
Physical workload0.060.0001
    None1.01.0
    Moderate (index: 1–2)2.4 (1.1 to 5.6)6.8 (2.2 to 20.6)
    Strenuous (index: 3–5)2.5 (0.9 to 7.3)7.2 (2.0 to 25.3)
  • *All models adjusted for age, gender and up to three potential confounders: uninteresting or monotonous work, hurried or tight work schedule, worry about making mistakes at work, tendency for somatisation, body mass index, diabetes and physical exercise.