Adjusted hazard ratios and 95% confidence intervals for injuries or illnesses reported in jobs with exposure to overtime and extended hour schedules, after controlling for age, gender, occupation, industry, and region
| Exposure category | Adjusted hazard ratio | 95% CI |
|---|---|---|
| NLSY data, 1987–2000, n = 109 087 job records. | ||
| Extended hours/week (⩾60) | 1.23 | 1.05 to 1.45 |
| Extended hours/day (⩾12) | 1.37 | 1.16 to 1.59 |
| Overtime | 1.61 | 1.43 to 1.79 |
| Extended commute time (⩾2 hours) | 0.87 | 0.59 to 1.23 |
| Any type of overtime or extended hours | 1.38 | 1.25 to 1.51 |