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Table 3 Cox regression, relative risk (RR) and 95% confidence intervals (CI) of factors in 1998 that predicted self-reported days of sickness absence because of MSD less than 12 days and more than 12 days during 2000.

From: Low back pain and widespread pain predict sickness absence among industrial workers

  Short-term sickness absence (1–12 days) (n= 2824) Long-term sickness absence (>12 days) (n= 3001)
Risk factor RR 95% CI p RR 95% CI p
Widespread MSD (0–10)* 1.15 1.07–1.23 <0.001 1.19 1.08–1.31 <0.001
Shoulders (1–5)*     1.15 1.01–1.32 0.034
Lower back (1–5)* 1.24 1.11–1.38 <0.001 1.20 1.06–1.36 0.005
Blue-collar vs. white-collar workers 1.96 1.49–2.58 <0.001 3.04 2.08–4.45 <0.001
Low social support (0–1) ** 1.28 1.11–1.49 0.001    
Women vs. men (0–1) 1.26 0.93–1.71 0.142 0.95 0.65–1.40 0.802
30–50 vs. <30 years 0.93 0.69–1.26 0.647 1.12 0.74–1.69 0.586
>50 vs. <30 years (0–1) 0.71 0.48–1.05 0.083 1.20 0.74–1.94 0.459
  1. * Continuous scale. The relative risk refers to the difference of one step on the scale. ** The relative risk refers to a difference in social support of 0.22, which is the difference between the lower and upper quartile in the distribution of social support.
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