Table 3.

Parameter estimates for the analysis of calf mortality dataset: the mean, median, and standard deviation (sd) of posterior distribution from a standard Cox model (model 1), a Cox model with random herd effect (model 2), and a CMM Cox model (model 3).

Predictor/parametera	Model 1			Model 2			Model 3
	Mean	Median	sd	Mean	Median	sd	Mean	Median	sd
Twin
Twin vs. single	0.145	0.149	0.199	0.205	0.208	0.197	0.213	0.218	0.202
Twin × Tb	−0.338	−0.338	0.077	−0.331	−0.331	0.075	−0.331	−0.330	0.077
Calf gender
Male vs. female	0.154	0.154	0.068	0.151	0.152	0.068	0.150	0.150	0.068
Calving assistance
Easy pull vs. unassisted	−0.105	−0.103	0.150	−0.050	−0.048	0.151	−0.049	−0.046	0.150
Hard pull vs. unassisted	0.872	0.877	0.169	0.921	0.924	0.173	0.917	0.920	0.174
Malpresentation vs. unassisted	0.532	0.541	0.253	0.535	0.543	0.251	0.537	0.546	0.254
Surgery vs. unassisted	−1.304	−1.202	0.980	−1.243	−1.131	0.976	−1.198	−1.090	0.960
Surgery × T	−0.737	−0.720	0.300	−0.743	−0.725	0.298	−0.739	−0.721	0.294
Cow age
≤2 years old vs. 5–10 years old	0.401	0.402	0.095	0.382	0.381	0.096	0.384	0.384	0.096
3 years old vs. 5–10 years old	0.340	0.341	0.095	0.342	0.342	0.095	0.349	0.350	0.096
4 years old vs. 5–10 years old	0.099	0.100	0.113	0.121	0.121	0.112	0.124	0.126	0.113
>10 years vs. 5–10 years old	0.332	0.333	0.126	0.308	0.309	0.127	0.305	0.307	0.127
Within-herd calving prop.
Linear	0.631	0.631	0.128	0.759	0.758	0.137	0.767	0.766	0.136
Quadratic	1.041	1.040	0.467	1.233	1.232	0.473	1.243	1.243	0.474
Mean 7-day temperaturec (°C)	−0.030	−0.030	0.006	−0.090	−0.090	0.006	−0.100	−0.100	0.006
Mean 7-day temperaturec × T	0.100	0.100	0.003	0.110	0.110	0.003	0.110	0.110	0.003
Provide sheltersd
Yes vs. no	−0.309	−0.310	0.083	−0.325	−0.325	0.144	−0.240	−0.240	0.145
Move calf pairse
Yes vs. no	−0.306	−0.307	0.074	−0.244	−0.245	0.125	−0.237	−0.237	0.126
Animals purchasedf
Yes vs. no	0.258	0.257	0.085	0.243	0.242	0.145	0.285	0.283	0.141
Herd variance				0.334	0.327	0.070	0.272	0.267	0.062
Veterinary clinic variance							0.024	0.012	0.030
Ecological region variance							0.099	0.073	0.100
DIC		14724.2			14566.1			14558.5

^aCoefficients for the 4th order polynomial of log(time) represents the baseline hazard not shown.

^bT is a standardized log time (log time-mean/sd) or T = [log(time in days) − 3.604]/1.062.

^cCoefficients × 10.

^dProvide shelters for calves separate from cows and heifers.

^eMove cow–calf pairs to a nursery pasture within 48 h of birth.

^fAnimal purchased in the month prior to or during calving.