Table 1

Characteristics of pregnant women with COVID-19

	All patients (n=1043)		Severe cases (n=56)		Non-severe cases (n=987)		P value
	n	%	n	%	n	%
Maternal age*
Median (IQR) (years)	30	26–34	33	29–38	30	26–34	<0.0001
Under 20	15	1.4	0	0.0	15	1.5	1.00
20–29	471	45.2	14	25.0	457	46.4	0.002
30–39	501	48.1	34	60.7	467	47.4	0.05
Over 40	54	5.2	8	14.3	46	4.7	0.002
Characteristic
Nulliparous†	480	46.6	22	39.3	458	47.1	0.26
Multiple pregnancy‡	17	1.7	3	5.7	14	1.5	0.06
Pregnancy period at diagnosis
Median (IQR) (weeks)	26	16–33	32	26–35	25	15–33	<0.0001
First trimester	202	19.4	1	1.8	201	20.4	<0.0001
Second trimester	380	36.4	15	26.8	365	37.0	0.12
Third trimester	461	44.2	40	71.4	421	42.7	<0.0001
Epidemiological history
Familial infection	537	51.5	28	50.0	509	51.6	0.82
Community acquired	164	15.7	10	17.9	154	15.6	0.65
Nosocomial infection	18	1.7	1	1.8	17	1.7	1.00
Workplace infection	50	4.8	1	1.8	49	5.0	0.51
Unknown	274	26.3	16	28.6	258	26.1	0.69
Comorbidities§
Diabetes	8	0.8	2	3.6	6	0.6	0.07
Chronic hypertension	7	0.7	2	3.6	5	0.5	0.05
Asthma	36	3.5	4	7.1	32	3.3	0.13
Body mass index>25	37	3.6	5	8.9	32	3.3	0.045
Pregnancy complications‡
Hypertensive disorders of pregnancy	19	1.9	2	3.8	17	1.8	0.27
HELLP syndrome	3	0.3	0	0.0	3	0.3	1.00
Gestational diabetes mellitus	40	4.0	5	9.4	35	3.7	0.06
Placental abruption	3	0.3	1	1.9	2	0.2	0.15
Deep venous thrombosis	1	0.1	0	0.0	1	0.1	1.00
Course of pregnancy
Pregnancy ongoing	192	18.4	5	8.9	187	18.9	0.07
Delivery	526	50.4	41	73.2	485	49.1	0.001
Delivery during infection	164	15.7	28	50.0	136	13.8	<0.0001
Spontaneous abortion	12	1.2	0	0.0	12	1.2	1.00
Induced abortion	4	0.4	0	0.0	4	0.4	1.00
Stillbirth	1	0.1	0	0.0	1	0.1	1.00
Unknown	308	29.5	10	17.9	298	30.2	0.05

Data are presented as n (%) or median (IQR). The p value is a comparison of severe and non-severe cases.
*Excluding 2 cases with missing data
†Excluding 14 cases with missing data
‡Excluding 47 cases with missing data
§Excluding 10 cases with missing data
HELLP, Hemolysis, elevated liver enzymes, and low platelet count.