Table 4.
The risk ratio (RR) and 95% confidence interval range of “dead” condemnations by heat index (HI) category in 149 slaughter plants with temperature data within 100 miles of plant location for United States Swine 2010–2015.
| HI (°F)a | RR | Confidence interval |
|---|---|---|
| Roaster | ||
| Baseline | 1.00 | |
| Moderate | 1.41 | (1.27, 1.56) |
| Hot | 0.80 | (0.72, 0.89) |
| Very hot | 0.12 | (0.10, 0.14) |
| Market | ||
| Baseline | 1.00 | |
| Moderate | 1.27 | (1.13, 1.42) |
| Hot | 1.37 | (1.22, 1.54) |
| Very hot | 1.17 | (1.03, 1.33) |
| Cull sows | ||
| Baseline | 1.00 | |
| Moderate | 2.07 | (1.86, 2.31) |
| Hot | 1.93 | (1.73, 2.15) |
| Very hot | 2.26 | (2.00, 2.55) |
aHI categories of baseline, moderate, hot, and very hot ranges are 54–79°F, 80–84°F, 85–92°F, and 93–106°F, respectively.