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Table 1 Association of different factors with subclinical mastitis

From: Prevalence of bovine subclinical mastitis and isolation of its major causes in Bishoftu Town, Ethiopia

Risk factors Number of cows examined CMT Bacteriology
Number positive Mean and 95% CI p-value Number positive Mean and 95% CI p-value
Body condition score
 Poor 7 3 42.9 (0–92.3) 0.92 3 42.1 (28.9–55.3) 0.78
 Medium 198 78 39.4 (32.5–46.3) 74 37.4 (30.6–44.2)
 Good 57 24 42.1 (28.9–55.3) 24 42.1 (28.9–55.3)
Milk yield (liters)
 ≥ 15 106 39 36.8 (27.5–46.1) 0.37 36 33.9 (24.8–43.1) 0.21
 < 15 156 66 42.3 (34.5–50.1) 65 41.7 (33.8–49.5)
Age (years)
 [2–6) 163 51 31.3 (24.1–38.5) 0.001 49 30 (22.9–37.2) 0.001
 [6–9) 81 41 50.6 (39.5–61.7) 39 48.1 (37.0–59.3)
 ≥ 9 18 13 72.2 (49.3–95.1) 13 72.2 (49.3–95.1)
Number of parity
 1–3 204 68 33.3 (26.8–39.8) 0.001 65 31.9 (25.4–38.3) 0.001
 4–6 53 32 60.4 (46.8–73.9) 31 58.5 (44.8–72.2)
 ≥ 7 5 5 100 5 100
  1. Keys: [for value included into the range,) for value not included into the range