Variable | d. f. | Parameter estimate | SE | Hazard ratio | p-value |
Stillbirth vs. live calf | 1 | −27 | 0.06 | 0.74 | <0.001 |
Male vs. female calf | 1 | −0.07 | 0.04 | 0.93 | 0.003 |
Multiparous vs. primiparous | 1 | −0.11 | 0.04 | 0.89 | <0.01 |
Assisted vs. unassisted | 1 | −0.18 | 0.06 | 0.84 | 0.004 |