Table 2.

Ordinal logistic regression for pregnancy outcome (miscarriage, not pregnant, pregnant) in relation to E₂ (Day 15), P4 (Day 15) and P4 (Day 16), before and after adjustment for baseline characteristics

	Continuous outcome		≥ Median vs. < Median
	OR	95 % CI	OR	95 % CI
Crude Analysis:
E2 (Day 15)	1.00	0.99–1.00	1.27	0.74–2.18
P4 (Day 15)	1.12	0.78–1.60	1.15	0.67–1.98
P4 (Day 16)	0.99	0.97–1.03	1.26	0.73–2.17
Adjusted Analysesa:
E2 (Day 15)	1.00	0.99–1.00	1.49	0.82–2.72
P4 (Day 15)	1.05	0.73–1.49	0.95	0.53–1.69
P4 (Day 16)	1.00	0.97–1.04	1.45	0.80–2.61

^aAdjusted for age (years), BMI (kg/m²) and embryo score

OR odds ratio, 95 % CI confidence interval