Table 2

OR* of first-time surgery for SIS in relation to occupational biomechanical exposures

ExposureSurgery for SIS (n)ORcrude95% CIORadj95% CI
Arm-elevation-years
 032941.01.0
 >0–233591.31.3 to 1.41.41.4 to 1.5
 >2–521971.41.3 to 1.51.51.5 to 1.6
 >5–1021471.71.6 to 1.81.81.7 to 1.9
 >10–5631211.91.8 to 2.02.12.0 to 2.2
p for trend <10−3p for trend <10−3
Repetition-years
 060011.01.0
 >0–118721.01.0 to 1.11.21.1 to 1.3
 >1–214231.41.3 to 1.51.51.5 to 1.6
 >2–1023571.51.4 to 1.51.61.5 to 1.6
 >10–6824651.91.8 to 2.01.91.8 to 2.0
p for trend <10−3p for trend <10−3
Force-years
 <529821.01.0
 516430.80.8 to 0.90.70.6 to 0.7
 >5–7.537701.31.2 to 1.31.21.1 to 1.2
 >7.5–1029331.71.6 to 1.81.51.4 to 1.6
 >10–2027901.91.8 to 2.01.71.6 to 1.8
p for trend <10−3p for trend <10−3
HAV-years
 080641.01.0
 >0–539371.11.0 to 1.21.31.2 to 1.3
 >5–5821171.51.4 to 1.51.51.5 to 1.6
p for trend <10−3p for trend <10−3
Shoulder-load-years
 058931.01.0
 >0–517941.21.2 to 1.31.41.3 to 1.5
 >5–1037451.71.6 to 1.81.71.6 to 1.7
 >10–159201.71.6 to 1.81.81.7 to 2.0
 >15–2017661.91.8 to 2.02.01.9 to 2.1
p for trend <10−3p for trend <10−3
  • *The OR can be interpreted as a HR.35

  • †Adjusted for time varying age (five age categories), sex, region of residence (five regions) and calendar year at start of follow-up. We did not mutually adjust for other exposure variables due to expected colinearity.18

  • HAV, hand-arm-vibration; SIS, subacromial impingement syndrome.