Table 2.
The results from the generalized linear mixed model of the cumulative first-week mortality in the study of 2267 flocks in 104 farms with 253 houses (Spain, 2015–2018).
| Type III Tests of Fixed Effects | ||||
|---|---|---|---|---|
| Factor | Num DF | Den DF | F Value | Pr > F |
| Type of broiler house | 1 | 242.6 | 6.28 | 0.0129 |
| Drip cup | 1 | 230 | 23.67 | <0.0001 |
| Study year | 3 | 6380 | 424.32 | <0.0001 |
| Season | 3 | 6380 | 449.73 | <0.0001 |
| Egg storage days | 2 | 6380 | 491.92 | <0.0001 |
| Breeder age (weeks) | 2 | 6380 | 3210.88 | <0.0001 |
| Chick gender | 2 | 6380 | 1762.58 | <0.0001 |
| Breed | 1 | 6380 | 1350.97 | <0.0001 |