Table 2 Kaplan Meier estimates of median time to recovery with 95% confidence intervals (CI) for explanatory variables in sheep by acute and chronic footrot
Variable | Category | Acute footrot | Chronic footrot | ||
|---|---|---|---|---|---|
| Â | Â | N (% of all affected) | Median time to recovery (95% CI) in days | N (% of all affected) | Median time to recovery (95% CI) in days |
Farm | 1 | 9 (14) | 7 (7-NE) | - | Â |
| Â | 2 | 37 (60) | 7 (7-7) | 2 (7) | 17 (14-NE) |
| Â | 3 | 9 (14) | 7 (3-NE) | - | - |
| Â | 4 | 6 (10) | 7 (7-NE) | 3 (10) | 19 (14-NE) |
| Â | 5 | 1 (2) | 2* | 5 (16) | 7 (6-NE) |
| Â | 6 | - | - | 9 (30) | 7 (7-NE) |
| Â | 7 | - | - | 11 (37) | 28 (17-28) |
Age | < 4 years | 34 (57) | 7 (7-7) | 12 (40) | 14 (7-21) |
|  | ≥ 4 years | 26 (43) | 7 (7-7) | 18 (60) | 17 (7-28) |
Presence of pus | Yes | 6 (10) | 7 (5-7) | 15 (50) | 8 (7-28) |
| Â | No | 56 (90) | 7 (7-7) | 15 (50) | 17 (8-21) |
Body condition score | 2 | - | - | 16 (53) | 7 (7-17) |
| Â | 3 | 52 (84) | 7 (7-7) | 14 (47) | 21 (17-28) |
| Â | 4 | 10 (16) | 7 (2-7) | - | - |
Footrot severity | Score 1 (acute) | 9 (15) | 3 (2-NE) | - | - |
| Â | Score 2 (acute) | 44 (70) | 7 (7-7) | - | - |
| Â | Score 3 (acute) | 9 (15) | 7 (5-14) | - | - |
| Â | Score 3 (chronic) | - | - | 21 (70) | 14 (7-17) |
| Â | Score 4 (chronic) | - | - | 9 (30) | 21 (7-NE) |
No. of days lame before treatment | Up to 1 wk | 41 (66) | 7 (7-7) | - | - |
| Â | > 1 wk-27 days | 21 (33) | 7 (7-7) | - | - |
| Â | > 27 days-2 months | - | - | 13 (43) | 14 (7-21) |
| Â | > 2-8 months | - | - | 10 (33) | 17 (7-28) |
| Â | > 8-24 months | - | - | 7 (24) | 7 (7-NE) |
Treatment | Oxytetracycline | 28 (45) | 7 (7-7) | 12 (40) | 17 (7-21) |
| Â | Enrofloxacin | 24 (39) | 7 (7-7) | 18 (60) | 14 (7-28) |
| Â | Topical treatment with potassium permanganate solution | 10 (16) | ^ (21-NE) | - | - |