Table 13.

Summary of multivariable associations [odds ratios (OR) with 95% confidence interval (95%CI)] comparing productivity outcomes among Canadian cow-calf herds based on geographic region and calving management reported with calving records for the C3SN between 2019 and 2022 (n = 565 herd reports).

Outcome	Earlier calving starts December to March vs. Later calving starts April to September			No large pastures used for calving vs. Calved on large pasture			East vs. West
	OR	95%CI	p value	OR	95%CI	p value	OR	95%CI	p value
Abortions	1.08	0.79, 1.47	0.63	0.69	0.49, 0.98	0.04	0.96	0.76, 1.21	0.72
Calf dead before 24 h	1.21	0.94, 1.34	0.21	0.91	0.75, 1.12	0.38	1.23	0.98, 1.53	0.07
Calf dead from 24 h to 30 days	1.69	1.25, 2.30	0.001	0.71	0.50, 1.01	0.06	1.15	0.88, 1.50	0.31
Treated calf respiratory disease to 30 days	5.79	3.29, 10.2	<0.001	1.43	0.70, 2.92	0.33	1.30	0.81, 2.09	0.27
Treated calf diarrhea to 30 days	2.90	1.75, 4.82	<0.001	1.44	0.77, 2.68	0.25	2.93	1.72, 4.93	<0.001
Treated navel or joint infection to 30 days	4.04	2.77, 5.89	<0.001	3.73	2.28, 6.09	<0.001	1.68	0.99, 2.86	0.06
Dead calf respiratory disease to 30 days	4.63	2.29, 9.39	<0.001	0.39	0.17, 0.87	0.02	1.77	0.98, 3.20	0.06
Dead calf diarrhea to 30 days	1.60	0.80, 3.21	0.19	0.53	0.24, 1.19	0.12	1.37	0.78, 2.42	0.27
Dead navel or joint infection to 30 days	2.82	1.25, 6.37	0.01	1.82	0.82, 4.03	0.14	1.52	0.75, 3.08	0.25

All models adjusted for study year, percentage of heifers calved, percentage of animals reported as purebred, and whether there were > 300 calving females.Values in bold font indicate statistically significant differences.