| DF | ATF |  |  |
---|---|---|---|---|
Injury severity | Injuries Incidence n/1000 h of exposure (95% CI) | Injuries Incidence n/1000 h of exposure (95% CI) | Rate ratio (95% CI) | P value (Tow sided) |
slight (0 days) & Minimal (1-3 days) | 13.70(8.95-20.08) | 2.90(0.79-7.43) | 4.72(1.63-18.61) | 0.0009 |
Mild (4-7 days) | 11.07(6.85-16.92) | 9.43(5.02-16.13) | 1.17(0.56-2.55) | 0.66 |
Moderate (8-28 days) | 8.43(4.82-13.69) | 5.80(2.50-11.43) | 1.45(0.58-3.92) | 0.39 |
Severe (>28 days) | 2.10(0.57-5.39) | 1.45(0.17-5.24) | 1.45(0.38-22.07) | 0.35 |