Table 1.
Descriptive statistics and results from univariable logistic regression analysis of associations between animal-level factors and the prevalence of subclinical mastitis defined as a score of ≥ 3 in the California Mastitis Tests in 256 dairy cows in peri-urban areas of Kigali, Rwanda
| Factors | CMT negative | CMT positive | SCM prevalence (%) | P value |
|---|---|---|---|---|
| Breed | 0.077 | |||
| Holstein | 5 | 36 | 87.8 | |
| Holstein local cross breed | 49 | 160 | 76.6 | |
| Others | 3 | 3 | 50.0 | |
| Parity | 0.012 | |||
| Primiparous | 24 | 48 | 66.7 | |
| Multiparous | 33 | 151 | 82.1 | |
| Stage of lactation | 0.106 | |||
| Early lactation (1 to 3 months) | 21 | 51 | 70.8 | |
| Mid (lactation four to seven) | 29 | 103 | 78.0 | |
| Late lactation (equal and above eight) | 7 | 45 | 86.5 | |
| Milk production (mean in L per day) | 9.1 | 9.6 | 0.464 | |
| Calf suckling | 0.039 | |||
| No | 18 | 93 | 83.8 | |
| Yes | 39 | 106 | 73.1 |
Others = Jersey local crossed breed, Sahiwal breed and local breed
CMT California Mastitis Test