Table III.

Multivariate logistical regression analysis of DEGO degree and other covariates (excluding AFS score).

Variables	Category	Estimate	SE	χ2*	P-value	Odds ratio	95% confidence interval
Test cohort
Intercept		3.3705	1.2008	7.8786	0.005	/	/
Age		−0.0849	0.0278	9.3622	0.0022	0.919	0.87–0.97
Gravidity	2	0.7324	0.354	4.2788	0.0386	2.08	1.039–4.163
	≥3	0.6298	0.3135	4.0345	0.0446	1.877	1.015–3.471
Visibility of fallopian tube ostia	Unilateral invisible	0.2791	0.86	0.1053	0.7456	1.322	0.245–7.133
	Bilateral visible	1.3508	0.654	4.266	0.0389	3.86	1.071–13.909
DEGO	G1	−1.4932	0.6273	5.6653	0.0173	0.225	0.066–0.768
	G2	−3.5891	0.6403	31.4194	<0.0001	0.028	0.008–0.097
	G3	−4.7467	0.8143	33.9816	<0.0001	0.009	0.002–0.043
Validation cohort
Intercept		2.7356	1.3021	4.4141	0.0356	/	/
Age		−0.0441	0.0339	1.695	0.1929	0.957	0.895–1.023
Gravidity	2	0.4683	0.4219	1.2319	0.267	1.597	0.699–3.652
	≥3	0.2055	0.394	0.272	0.602	1.228	0.567–2.658
Visibility of fallopian tube ostia	Unilateral invisible	0.5001	0.808	0.3831	0.5359	1.649	0.338–8.034
	Bilateral visible	0.401	0.5634	0.5066	0.4766	1.493	0.495–4.506
DEGO degree	G1	−1.3449	0.6652	4.0872	0.0432	0.261	0.071–0.96
	G2	−3.441	0.6819	25.4664	<0.0001	0.032	0.008–0.122
	G3	−4.3012	0.8331	26.6538	<0.0001	0.014	0.003–0.069

^*χ² test for entire group.