Effect of oral calcium administration on metabolic status and uterine health of dairy cows with reduced postpartum rumination and eating time

Table 2 Results from the multivariable logistic regression analyses for puerperal metritis diagnosis at d 5 and at d 12 after calving. Models included treatment (combined treatment), parity category (forced in the final models) and the interaction treatment by parity. As no significant effect for the interaction treatment by parity was established, this term was removed from the models

Condition	AOR^a	95% CI^b	P-value		Prevalence
Puerperal metritis at d 5
Treatment^c				Treatment	+/n^d	%
CA vs. CON	1.59	0.50 - 5.01	0.43	CA	9/44	20.5
CA vs. NOR	2.42	0.88 - 6.64	0.08	CON	6/40	15.0
CON vs. NOR	1.52	0.50 - 4.66	0.46	NOR	9/94	9.6
Combined treatments
Reduced CRET vs. NOR^e	1.97	0.81 - 4.80	0.13
Puerperal metritis at d 12
Treatment
CA vs. CON	1.74	0.46 - 6.57	0.41	CA	7/44	15.9
CA vs. NOR	4.3	1.18 - 15.6	0.02	CON	4/39	10.3
CON vs. NOR	1.47	0.58 - 10.5	0.22	NOR	4/94	4.2
Combined treatments
Reduced CRET vs. NOR	3.44	1.04 - 11.2	0.04

^aAdjusted odds ratios for the respective condition
^b95% confidence interval
^cGroups based on CRET at d 1 postpartum and allocated to two treatments: (1) Calcium supplemented (CA); and (2) Control (CON) that did not receive any supplementation. Unaffected controls (NOR; CRET ≥489 min/d) remained untreated
^dNumber of cases divided by treatment total
^eReduced CRET = Combined CA and CON

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