Table 3 A comparison of injury rates between sexes and mine licensing status
Overall injury rate | Injury rates at unlicensed sites | Injury rates at licensed sites | Rate ratio (95% CI) | P-value | |
|---|---|---|---|---|---|
Both sexes | 121 injuries / 2245 person years =5.39 injuries/100 person years | 59 injuries / 995 person years =5.93 injuries/100 person years | 62 injuries / 1250 person years =4.96 injuries/100 person years | 1.20 (0.83–1.71) | 0.33 |
Males | 107 injuries / 2128 person years =5.03 injuries/100 person years | 59 injuries / 975 person years =6.05 injuries/100 person years | 48 injuries / 1153 person years =4.16 injuries/100 person years | 1.45 (0.99–2.14) | 0.05 |
Females | 14 injuries / 117 person years =11.97 injuries/100 person years | 0 injuries / 20 person years =0 injuries/100 person years | 14 injuries / 97 person years =14.43 injuries/100 person years | / | < 0.01 |
Rate Ratio | 0.42 (0.25–0.76) | / | 0.29 (0.16–0.54) | ||
P-value | < 0.01 | 0.30 | < 0.01 |