Table 2.
Risk factor | OR | 95% CI | Value of p |
---|---|---|---|
Abortion history | |||
Yesa | |||
No | 1.09 | 0.64–1.87 | 0.74 |
Herd size | |||
1–50a | |||
51–100 | 1.48 | 0.64–3.44 | 0.36 |
101–150 | 1.38 | 0.78–2.46 | 0.26 |
>150 | 9.88 | 3.92–24.89 | <0.01 |
Likelihood ratio Chi-squared = 2.31. Chi-squared probability = 0.13. OR, Odds ratio; CI, Confidence interval.
Reference category.