Table-1.
Relative risk factors associated with the prevalence of bovine respiratory syncytial virus in cattle.
| Factors | Number of cattle tested | Indirect enzyme-linked immunosorbent assay test | |||
|---|---|---|---|---|---|
| Number of positive (%) | RR | 95% confidence interval | p-value | ||
| Age | |||||
| ≥7 months | 85 | 40 (47)a | 1 | ||
| <4 years | 30 | 15 (50)a | 0.94 | 0.61-1.43 | 0.83 |
| <1.5-4 years | 175 | 159 (90.8)b | 1.93 | 1.53-2.43 | 0.000 |
| <7 months-1.5 years | 160 | 160 (100)b,c | 2.12 | 1.53-2.43 | 0.000 |
| Gender | |||||
| Female | 141 | 115 (81.5)a | 1 | ||
| Male | 309 | 259 (83.8)a | 1.02 | 0.93-1.12 | 0.58 |
| Origin | |||||
| Native | 191 | 144 (75.3)a | 1 | ||
| Imported | 259 | 230 (88.8)b | 1.17 | 1.07-1.29 | 0.0002 |
| Herd size | |||||
| Small ≤10 | 191 | 124 (64.9)a | 1 | ||
| Large ≥20 | 259 | 250 (96.5)b | 1.48 | 1.33-1.65 | 0.000 |
Values significantly different (p<0.05) labeled with different letters (a, b, or c)