Table 3 Multivariate logistic regression analysis results for combined maternal outcome of women with COVID-19 during pregnancy.

Combined Outcome	Level	OR	95% CI	P value
ART = assisted reproductive technology; BMI = body mass index; CI = confidence interval; OR = odds ratio
Multiple gestation	present	1.75	[1.05; 2.80]	0.02
BMI > 30 (before pregnancy)	present	1.52	[1.23; 1.88]	< 0.001
Gestational age in weeks		1.05	[1.03; 1.06]	< 0.001
Maternal age > 35	present	0.89	[0.72; 1.09]	0.26
Maternal comorbidities	present	0.98	[0.81; 1.18]	0.83
Mode of conception	ART	0.96	[0.61; 1.46]	0.86
Smoking (during pregnancy)	present	0.57	[0.32; 0.94]	0.04