Risk of miscarriage in women with endometriosis undergoing IVF fresh cycles: a retrospective cohort study

Table 4 Subgroup analyses on the risk of miscarriage

	Subgroup	Abortions n (%)	Subgroup	Abortions n (%)	P value	Crude OR (95% CI)	Adjusted OR (95% CI)
In vitro fertilization technique used-IVF	Endometriosis		Controls
In vitro fertilization technique used-IVF	720	154 (21.4)	1557	300 (19.3)	0.239	1.140 (0.917–1.418)	1.099 (0.869–1.391) ^a
In vitro fertilization technique used-ICSI	Endometriosis		Controls
In vitro fertilization technique used-ICSI	286	71 (24.8)	455	105 (23.1)	0.586	1.101 (0.779–1.555)	1.186 (0.815–1.727) ^a
Endometriomas at ultrasound	Yes		No
Endometriomas at ultrasound	358	71 (19.8)	648	154 (23.8)	0.152	0.794 (0.578–1.089)	0.883 (0.634–1.222) ^b
Endometrioma size	≥ 30 mm		< 30 mm
Endometrioma size	77	19 (24.7)	281	52 (18.5)	0.229	1.443 (0.792–2.627)	1.412 (0.767–2.600) ^b

a. Model adjusted for BMI, gravidity, parity, male factor infertility, total dose of FSH administered and number of oocytes retrieved
b. Model adjusted for BMI, duration of stimulation and total dose of FSH administered

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