. 2017 May 11;4:67. doi: 10.3389/fvets.2017.00067

Table 3.

Weekly condemnation rate (CR), attributable risk (AR), and expected incidence rate (EIR) of “dead” condemnations by heat index (HI) category in 149 slaughter plants with temperature and humidity data within 100 miles of plant location for United States Swine 2010–2015.

HI^b (°F)	Est. prob. condemned (CR)	AR	EIR (per 10,000)
Roaster
Baseline	0.00123^a		12
Moderate	0.00173^a	0.0005	17
Hot	0.00098^a	−0.00025	10
Very hot	0.00015^a	−0.00108	2
Market
Baseline	0.0030^a		30
Moderate	0.0038^a	0.0008	38
Hot	0.0041^a	0.0011	41
Very hot	0.0035^a	0.0005	35
Cull sows
Baseline	0.0027^a		27
Moderate	0.0056^a	0.0029	56
Hot	0.0052^a	0.0025	52
Very hot	0.0061^a	0.0034	61

Estimated CR are based on a zero-inflated negative binomial generalized linear mixed model.

^aSignificant at alpha = 0.05. All HI categories are nested within swine classes. For example, a significant proportion of variability in “dead condemnations” was accounted for by the BASELINE HI category nested within the ROASTER class after accounting for the offset term, log of total swine, and all other factors in the model.

^bHI categories of baseline, moderate, hot, and very hot ranges are 54–79°F, 80–84°F, 85–92°F, and 93–106°F, respectively.