Table 3 Hurdle regression model, with count and hurdle components, on the association of leg-length discrepancy (LLD) greater than 5 mm and other explanatory variables with self-reported number of days with low back pain during the past year
From: Leg-length discrepancy is associated with low back pain among those who must stand while working
Hurdle | Count | |||
|---|---|---|---|---|
Unadjusted OR(95% CI) | AdjustedaOR(95% CI) | Unadjusted MR(95% CI) | AdjustedaMR (95% CI) | |
LLD > 5 mm | ||||
No | 1.00 | 1.00 | 1.00 | 1.00 |
Yes | 1.45 (0.67-3.13) | 1.35 (0.56-3.20) | 2.32 (1.33-4.05)** | 2.89 (1.63-5.09)*** |
Depressive feelings | 1.27 (1.07-1.52)** | 1.09 (1.01-1.17)* | ||
Gender | ||||
Male | 1.00 | 1.00 | ||
Female | 0.69 (0.24-1.92) | 0.39 (0.19-0.77) | ||
Smoking | ||||
No | 1.00 | 1.00 | ||
Yes | 2.63 (0.80-8.65) | 0.53 (0.28-0.97) | ||
Age | 0.96 (0.90-1.01) | 0.99 (0.95-1.02) | ||
Working position b | ||||
Sitting | 1.00 | 1.00 | ||
Standing | 2.57 (0.87-7.69) | 1.95 (0.93-4.09) | ||