Which endometrial preparation protocol provides better pregnancy and perinatal outcomes for endometriosis patients in frozen-thawed embryo transfer cycles? A retrospective study on 1413 patients

Table 2 Crude and adjusted odds ratios of clinical outcomes

Variable	HRT vs. NC		GnRHa + HRT vs. NC		GnRHa + HRT vs. HRT
Variable	Crude OR (95% CI)	Adjusted OR (95% CI)	Crude OR (95% CI)	Adjusted OR (95% CI)	Crude OR (95% CI)	Adjusted OR (95% CI)
Live Birth ^a	1.00 (0.61-1.61)	0.83 (0.49-1.38)	0.98 (0.59-1.63)	0.86 (0.50-1.48)	0.99 (0.78-1.26)	1.04 (0.80-1.35)
Clinical Pregnancy ^b	1.18 (0.73-1.89)	0.99 (0.60-1.64)	1.24 (0.76-2.05)	1.13 (0.67-1.93)	1.06 (0.84-1.34)	1.15 (0.89-1.48)
Miscarriage ^c	1.85 (0.66-5.20)	1.80 (0.64-5.07)	2.23 (0.78-6.41)	2.22 (0.77-6.39)	1.20 (0.82-1.76)	1.23 (0.84-1.80)
Multiple pregnancy ^d	2.24 (0.80-6.27)	1.91 (0.56-6.53)	1.84 (0.64-5.32)	2.24 (0.63-7.92)	0.82 (0.55-1.21)	1.17 (0.70-1.96)
Biochemical Pregnancy ^e	2.47 (0.59-10.30)	2.31 (0.55-9.66)	2.90 (0.68-12.41)	2.80 (0.65-12.02)	1.17 (0.74-1.86)	1.21 (0.76-1.92)

Odds ratios (ORs) and 95% confidence intervals (CIs) are based on the univariate analysis while adjusted odds ratios (AORs) and 95% CIs are based on the multiple logistic regression model
^a Adjusted for maternal age at FET, BMI, infertility diagnosis, diminished ovarian reserve, No. of surviving embryos, type of embryos transferred and endometrial thickness
^b Adjusted for maternal age at FET, BMI, infertility diagnosis, diminished ovarian reserve,endometrial thickness, No and type of embryos transferred
^c Adjusted for maternal age at FET, BMI, infertility diagnosis, type of embryos transferred
^d Adjusted for maternal age at FET, BMI, infertility diagnosis, type of embryos transferred
^e Adjusted for maternal age at FET, BMI, infertility diagnosis, type of embryos transferred

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