Table 1:

Baseline characteristics of participants with specimens analyzed

Characteristic	Baseline				Repeat
	Overall	HIV-uninfected	HIV-infected preconceptional ART	HIV-infected no preconceptional ART	Overall	HIV-infected preconceptional ART	HIV-infected no preconceptional ART
	N (%) or median (IQR)	N (%) or median (IQR)	N (%) or median (IQR)	N (%) or median (IQR)	N (%) or median (IQR)	N (%) or median (IQR)	N (%) or median (IQR)
Total number of women	207	130	46	31	51	30	21
EGA at collection, weeks	18 (17, 19)	18 (17, 19)	18 (16, 18)	18 (17, 19)	18 (16, 19)	18 (16, 18)	18 (17, 19)
Age, years	26 (22, 32)	25 (22, 31)	30 (27, 33)	25 (21, 29)	28 (25, 32)	30 (27, 33)	25 (21, 29)
<20	16 (8%)	13 (10%)	0 (0%)	0 (0%)	2 (4%)	0 (0%)	2 (10%)
20–34	164 (80%)	97 (76%)	39 (84%)	28 (90%)	43 (86%)	24 (83%)	19 (90%)
≥35	24 (12%)	17 (13%)	7 (15%)	3 (10%)	5 (10%)	5 (17%)	0 (0%)
missing	3	3	7	3	1	1	0
Married or cohabitating	173 (84%)	110 (85%)	38 (84%)	25 (83%)	42 (82%)	26 (87%)	16 (76%)
missing	2	0	1	1	1	0	1
BMI, kg/m2	23 (21, 27)	24 (21, 28)	24 (22, 26)	22 (20, 25)	23 (21, 25)	23 (22, 26)	23 (21, 25)
<18.5	7 (4%)	4 (3%)	1 (2%)	2 (7%)	1 (2%)	0 (0%)	1 (5%)
18.5–30	161 (80%)	96 (77%)	38 (84%)	27 (90%)	45 (90%)	27 (90%)	18 (90%)
>30	32 (16%)	25 (20%)	6 (13%)	1 (3%)	4 (8%)	3 (10%)	1 (5%)
missing	7	5	1	1	1	0	1
Parity	1 (0,2)	1 (0,2)	2 (1,3)	1 (1,2)	2 (1,3)	2 (1,3)	1 (1,2)
Prior PTB
0 (nulliparous)	54 (26%)	41 (32%)	6 (13%)	7 (23%)	7 (14%)	3 (10%)	4 (19%)
0 (parous)	93 (45%)	55 (42%)	27 (59%)	11 (35%)	25 (49%)	18 (60%)	33 (7%)
1 or more	60 (29%)	34 (26%)	13 (28%)	13 (42%)	19 (37%)	9 (30%)	10 (48%)
Twins	8 (4%)	5 (4%)	1 (2%)	2 (6%)	1 (2%)	1 (3%)	0 (0%)
Short Cervix < 2.5 cm	5 (2%)	2 (2%)	2 (5%)	1 (3%)	2 (4%)	1 (4%)	1 (5%)
missing	18	13	4	1	2	1	1

IQR, interquartile range; BMI, body mass index; PTB, preterm birth; EGA, estimated gestational age