Unadjusted rate ratios, hazard ratios, and 95% confidence intervals for injuries or illnesses reported in jobs with exposure to overtime and extended hour schedules
| Exposure category | Unadjusted rate ratio | 95% CI | Unadjusted hazard ratio | 95% CI |
|---|---|---|---|---|
| NLSY data, 1987–2000. n = 110 236 job records for rate ratios, 109 087 for hazard ratios. | ||||
| Extended hours/week (⩾60) | 1.29 | 1.18 to 1.42 | 1.29 | 1.15 to 1.46 |
| Extended hours/day (⩾12) | 1.38 | 1.26 to 1.51 | 1.46 | 1.30 to 1.63 |
| Overtime | 1.84 | 1.75 to 1.94 | 1.84 | 1.70 to 2.00 |
| Extended commute time (⩾2 hours) | 0.93 | 0.75 to 1.14 | 0.94 | 0.72 to 1.22 |
| Any type of overtime or extended hours | 1.41 | 1.35 to 1.48 | 1.48 | 1.38 to 1.59 |