Table 3.

Binary logistic regression analysis for women aged ≤ 35 years

Parameter	%(n/)	Crude OR (95%CI)	Adjusted OR (95%CI)
Live birth
VD (n = 214)	45.8%(98/214)	1.00	1.00
CS (n = 187)	37.4%(70/187)	0.70(0.47 ~ 1.05)	0.81(0.52 ~ 1.33)
CSD (n = 42)	21.4%(9/42)	0.32(0.14 ~ 0.70)*	0.35(0.15 ~ 0.85)*
Positive hCG test
VD (n = 214)	59.8%(128/214)	1.00	1.00
CS (n = 187)	49.2%(92/187)	0.65(0.43 ~ 0.96)	0.82(0.52 ~ 1.27)
CSD (n = 42)	38.1%(16/42)	0.41(0.20 ~ 0.81)*	0.52(0.24 ~ 0.82)*
Clinical pregnancy
VD (n = 214)	55.6%(119/214)	1.00	1.00
CS (n = 187)	46.0%(86/187)	0.68(0.45 ~ 1.008)	0.84(0.53 ~ 1.33)
CSD (n = 42)	31.0%(13/42)	0.35(0.17 ~ 0.72)*	0.43(0.19 ~ 0.92)*
Mean implantation rate (mean ± SD)
VD (n = 214)	0.43 ± 0.43	1.00	1.00
CS (n = 187)	0.41 ± 0.47	0.97(0.89 ~ 1.06)	0.97(0.89 ~ 1.06)
CSD (n = 42)	0.27 ± 0.43	0.84(0.73 ~ 0.98)*	0.85(0.73 ~ 0.98)*
Early abortion
VD (n = 214)	9.2%(11/119)	1.00	1.00
CS (n = 187)	9.3%(8/86)	0.82(0.32 ~ 2.09)	0.97(0.34 ~ 2.76)
CSD (n = 42)	15.4%(2/13)	0.92(0.19 ~ 0.19)	1.03(0.20 ~ 5.27)
Ectopic pregnancy
VD (n = 214)	2.5%(3/119)	1.00	1.00
CS (n = 187)	2.3%2/86)	0.76(0.12 ~ 4.60)	1.17(0.15 ~ 8.94)
CSD (n = 42)	7.7%(1/13)	1.71(0.17 ~ 16.90)	2.94(0.19 ~ 44.65)

^*P < 0.05 (adjusted for age, BMI, infertility cause, infertility category, endometrial thickness on the trigger day, fertilization methods, the number of embryos transferred, high-quality embryo transferred and day of transfer)