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Results of Cox regression analysis revealing risk factors for colibacillosis in layer chickens in Hawassa.
| Variable | Category | HR | P value | 95% CI |
|---|---|---|---|---|
| Farm hygiene | Good | 0.006 | 0.000 | 0.003, 0.015 |
| Poor | ||||
| Age of chicken | 4–5 month | 0.079 | 0.000 | 0.027, 0.232 |
| >5 month | ||||
| Housing condition | Good | 0.074 | 0.000 | 0.035, 0.154 |
| Poor |
