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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

From: A clinical trial comparing parenteral oxytetracyline and enrofloxacin on time to recovery in sheep lame with acute or chronic footrot in Kashmir, India

Variable Category Acute footrot Chronic footrot
   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) -  
  2 37 (60) 7 (7-7) 2 (7) 17 (14-NE)
  3 9 (14) 7 (3-NE) - -
  4 6 (10) 7 (7-NE) 3 (10) 19 (14-NE)
  5 1 (2) 2* 5 (16) 7 (6-NE)
  6 - - 9 (30) 7 (7-NE)
  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)
  No 56 (90) 7 (7-7) 15 (50) 17 (8-21)
Body condition score 2 - - 16 (53) 7 (7-17)
  3 52 (84) 7 (7-7) 14 (47) 21 (17-28)
  4 10 (16) 7 (2-7) - -
Footrot severity Score 1 (acute) 9 (15) 3 (2-NE) - -
  Score 2 (acute) 44 (70) 7 (7-7) - -
  Score 3 (acute) 9 (15) 7 (5-14) - -
  Score 3 (chronic) - - 21 (70) 14 (7-17)
  Score 4 (chronic) - - 9 (30) 21 (7-NE)
No. of days lame before treatment Up to 1 wk 41 (66) 7 (7-7) - -
  > 1 wk-27 days 21 (33) 7 (7-7) - -
  > 27 days-2 months - - 13 (43) 14 (7-21)
  > 2-8 months - - 10 (33) 17 (7-28)
  > 8-24 months - - 7 (24) 7 (7-NE)
Treatment Oxytetracycline 28 (45) 7 (7-7) 12 (40) 17 (7-21)
  Enrofloxacin 24 (39) 7 (7-7) 18 (60) 14 (7-28)
  Topical treatment with potassium permanganate solution 10 (16) ^ (21-NE) - -
  1. *one observation; ^less than 50% sheep recovered; NE not estimated