Table 2.
Latent class models for treatment of lambs and ewes.
| Latent class | No. of flocks | GM prevalence of lameness in lambs (95% CI) | BH-adjusted P | GM prevalence of lameness in ewes (95% CI) | BH-adjusted P | ||||
|---|---|---|---|---|---|---|---|---|---|
| LC2 | LC3 | LC4 | LC2 | LC3 | LC4 | ||||
| Treatment of lambs latent class model | |||||||||
| LC1 | 117 | 1.0 (0.6–1.7)a | <0.001 | <0.001 | <0.001 | 2.8 (2.0–3.9)a | 0.70 | 0.70 | 0.70 |
| LC2 | 214 | 2.8 (2.2–3.5)b | 0.60 | 0.50 | 3.7 (3.2–4.3)a | 0.90 | 0.90 | ||
| LC3 | 257 | 3.1 (2.3–3.7)b | 0.74 | 4.0 (3.6–4.4)a | 0.90 | ||||
| LC4 | 235 | 3.5 (3.1–4.1)b | – | 3.9 (3.5–4.3)a | – | ||||
| Treatment of ewes latent class model | |||||||||
| LC1 | 86 | 1.1 (0.6–2.1)a | 0.15 | 0.04 | <0.01 | 1.8 (1.0–3.1)a | 0.62 | 0.01 | 0.01 |
| LC2 | 134 | 2.4 (1.8–3.2)ab | 0.45 | 0.15 | 3.2 (2.9–3.7)a | 0.02 | 0.01 | ||
| LC3 | 198 | 2.5 (1.9–3.3)b | 0.45 | 3.9 (3.5–4.4)b | 0.78 | ||||
| LC4 | 490 | 3.0 (2.6–3.4)b | – | 4.2 (3.9–4.5)b | – | ||||
Number of flocks, geometric mean period prevalence of lameness and 95% confidence intervals for treatment of lambs (823 flocks) and treatment of ewes (908 flocks) with footrot in England, 2012–2013.
GM, geometric mean; 95% CI, 95% confidence interval (lower, upper); BH, Benjamini–Hochberg. Where superscripts (a, b) differ across rows, prevalence of lesion or lameness differs (BH-adjusted Wilcoxon p ≤ 0.05) between latent classes. BH-adjusted Wilcoxon p-values are shown for all pairwise comparisons of prevalence of lameness between latent classes.