Parameter
Overall sample (N=144) Stage 0 (n=35) Stage 1 (n=15) Stage 2 (n=34) Stage 3 (n=36) Stage 4 (n=24)
Age, years 29.0 (22.0-35.0) 31.0 (25.50-35.50) 26.0 (21.50-31.50) 29.0 (20.50-34.80) 28.50 (22.0-35.0) 25.0 (17.80-33.0)
Delivery, WoG* 37.30 (36.0-38.70) 37.20 (35.80-39.0) 37.0 (36.20-38.40) 37.0 (36.0-38.20) 37.10 (35.30-38.0) 38.30 (37.30-39.0)
Sample collection, WoG* 30.87±6.52 25.90±5.98 26.0±8.48 31.0±4.57 33.10±3.94 37.70±2.19
Term delivery, n (%) 96 (66.70) 23 (65.70) 10 (66.70) 22 (64.70) 20 (55.60) 21 (87.50)
Preterm delivery, n (%) 48 (33.30) 12 (34.30) 5 (33.30) 12 (35.30) 16 (44.40) 3 (12.50)
Preterm delivery, n (%) Preterm delivery, n (%) Preterm delivery, n (%) Preterm delivery, n (%) Preterm delivery, n (%) Preterm delivery, n (%) Preterm delivery, n (%)
32-36 WoG 35 (24.30) 9 (25.70) 2 (13.30) 8 (23.50) 14 (38.90) 2 (8.33)
28-31 WoG 10 (6.94) 3 (8.57) 1 (6.67) 4 (11.80) 1 (2.78) 1 (4.17)
<28 WoG 3 (2.08) NA 2 (13.30) NA 1 (2.78) NA
Gestations, n (%) Gestations, n (%) Gestations, n (%) Gestations, n (%) Gestations, n (%) Gestations, n (%) Gestations, n (%)
1 49 (34.0) 7 (20.0) 5 (33.30) 13 (38.20) 12 (33.30) 12 (50.0)
≥2 95 (66.0) 28 (80.0) 10 (66.70) 21 (61.80) 24 (66.70) 12 (50.0)
History of PTB, n (%) History of PTB, n (%) History of PTB, n (%) History of PTB, n (%) History of PTB, n (%) History of PTB, n (%) History of PTB, n (%)
Negative 131 (91.97) 31 (88.60) 15 (100.0) 30 (88.20) 32 (88.90) 23 (95.83)
Positive 13 (9.03) 4 (11.40) NA 4 (11.80) 4 (11.10) 1 (4.17)