TABLE 2:

Proportion of pregnancies per treatments (P/T) for different quartiles of the variables age, withers height, and dominant follicle size on day 6 and for presence or not of a corpus luteum on day 0

VariableCategoryRangeP/TOdds ratioP value
Age (days)1388–4380.610.99 (0.99–1)0.044
2439–4640.60
3465–4920.53
4493–7360.55
Withers height (cm)1115–1230.501.10 (1–1.20)0.053
2124–1280.57
3129–1310.56
4132–1390.66
Presence of a corpus luteum on day 0 (mm)Yes0.601.95 (0.92–4.15)0.082
No0.44Reference
Dominant follicle size on day 6 (mm)18–100.670.84 (0.76–0.92)<0.001
211–120.64
313–150.60
416–220.31
  • Odds ratios obtained from multivariable logistic regression modelling are also presented (odds of being pregnant v non-pregnant). Odds ratios for the continuous variables age, withers height and dominant follicle size on day 6 are presented per unit increase.