Table V.
Proportionate Injury Ratio (PIR) Analyses of Livestock-Handling Injuries Among Cattle/Livestock Raisers Comparing Livestock-Handling Injuries to All Other Injuries by Operation Size, Gender, Age, and Experience
| Livestock-handling Injuries (%) | All other Injuries (%) | Expected livestock-handling injuriesa | PIRb (95% CI) | |
|---|---|---|---|---|
| Operation Size | ||||
| Large | 202 (20.2) | 799 (79.8) | 222 | 0.91 (0.79–1.05) |
| Small | 269 (23.1) | 898 (76.9) | 249 | 1.08 (0.95–1.22) |
| Gender | ||||
| Female | 92 (28.6) | 230 (71.4) | 64 | 1.44 (1.16–1.77)* |
| Male | 379 (20.5) | 1,467 (79.5) | 407 | 0.93 (0.84–1.03) |
| Age** | ||||
| 16–24 | 117 (21.8) | 419 (78.2) | 116 | 1.01 (0.83–1.21) |
| 25–34 | 129 (26.4) | 360 (73.6) | 100 | 1.29 (1.08–1.53)* |
| 35–44 | 97 (19.3) | 406 (80.7) | 113 | 0.86 (0.70–1.05) |
| 45–54 | 97 (23.3) | 320 (76.7) | 89 | 1.09 (0.89–1.33) |
| 55–64 | 24 (13.3) | 156 (86.7) | 43 | 0.55 (0.36–0.82)* |
| 65–79 | 7 (16.3) | 36 (83.7) | 10 | 0.70 (0.28–1.44) |
| Experience | ||||
| 0–6 months | 257 (18.9) | 1,106 (81.1) | 240 | 1.07 (0.94–1.21) |
| 6 months-2 years | 86 (17.6) | 402 (82.4) | 87 | 0.98 (0.79–1.22) |
| 2–5 years | 54 (16.0) | 283 (84.0) | 61 | 0.88 (0.66–1.15) |
| 5+ years | 74 (16.4) | 377 (83.6) | 82 | 0.90 (0.71–1.13) |
| Total | 471 (17.8) | 1,697 (64.3) |
a
Expected frequency for livestock-handling injuries by category if they had the same distribution by category as those for all other injuries.
b
The proportionate injury ratio (PIR) is calculated by dividing the observed livestock-handling injuries by expected livestock-handling injuries within a category.
*
Statisticallly significant (P-value < 0.05).
**
Statistically significant Mantel–Haenszel χ2 test for trend (P-value < 0.05).