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Table 5 Odds ratios for the mixed logistic regression model of heifer conception

From: The creation and evaluation of a model to simulate the probability of conception in seasonal-calving pasture-based dairy heifers

Variable Odds Ratio (95% CI) P-value
Breed   0.53
 FR 1  
 FRX 1.21 (0.36–4.09)  
 HO 1.19 (0.71–1.98)  
 JE 0.85 (0.37–1.97)  
 JEX 1.15 (0.53–2.50)  
 MO 0.64 (0.28–1.47)  
 NO 1.79 (0.35–9.10)  
 NR 0.47 (0.22–1.02)  
 Other 0.64 (0.21–1.96)  
Age (d/10) 1.00 (0.96–1.04) 1
CIV 0.93 (0.87–0.99) 0.03
Month   1
 April 1  
 May 7.70 (0.58–101.92)  
 June/July 146.98 (2.26–9560.94)  
Age * Month   0.10
 April 1  
 May 0.97 (0.92–1.02)  
 June/July 0.92 (0.84–0.99)  
  1. Legend: FR Friesian, FRX Friesian cross, HO Holstein, JE Jersey, JEX Jersey cross, MO Montbeliarde, NO Normande, NR Norwegian Red, CIV calving interval PTA
  2. Footnote 1: P-values are not calculated for the inclusion of individual effects where they are also involved in an interaction