Table 2 Sociodemographic data
Variablesa | Control (n = 201) | PTL (n = 136) | PPROM (n = 65) | p (Control vs. PTL) | p (Control vs. PPROM) |
|---|---|---|---|---|---|
Age (years) | 23.9 (±6.1) | 22.8 (±6.3) | 26.2 (±6.2) |  |  |
GA at delivery (days) | 278 (273–284) | 251 (236–260) | 247 (238–254) | p < 0.001 | p < 0.001 |
GA at PTL/PPROM (days) |  | 241 (224–250) | 244 (230–251) |  |  |
Marital status | |||||
 Single | 21.1 % (42/199) | 27.6 % (35/127) | 19.7 % (12/61) | NS | NS |
 Married | 78.9 % (157/199) | 72.4 % (92/127) | 80.3 % (49/61) | ||
Self-reported ethnicity | |||||
 White | 52.3 % (104/199) | 62.7 % (84/134) | 60 % (39/65) | NS | NS |
 Non-white | 47.7 % (95/199) | 37.3 % (50/134) | 40 % (26/65) | ||
Parity | |||||
 Primiparous | 48.5 % (97/200) | 46.3 % (62/134) | 36.9 % (24/65) | NS | NS |
 Multiparous | 51.5 % (103/200) | 53.7 % (72/134) | 63.1 % (41/65) | ||
Smoking habits | |||||
 Yes | 11.9 % (24/201) | 23.5 % (31/132) | 21.5 % (14/65) | p = 0.007 | NS |
 No | 88.1 % (177/201) | 76.5 % (101/132) | 78.5 % (51/65) | ||
Years of study | |||||
 Up until 9 years | 23.8 % (45/189) | 25.6 % (32/125) | 21 % (13/62) | NS |  |
 9 to 12 years | 70.4 % (133/189) | 72 % (90/125) | 75.8 % (47/62) | NS | |
 More than 12 years | 5.8 % (11/189) | 2.4 % (3/125) | 3.2 % (2/62) |  | |
Previous PPROM | |||||
 Yes | - | 20.8 % (15/72) | 24.4 % (10/41) |  |  |
 No | 100 % (102/102) | 79.2 % (57/72) | 75.6 % (31/41) |  | |
Previous PTL | |||||
 Yes | - | 43.1 % (31/72) | 29.3 % (12/41) |  |  |
 No | 100 % (102/102) | 56.9 % (41/72) | 70.7 % (29/41) |  | |
Abortion | |||||
 Yes | 24.8 % (28/113) | 34.7 % (25/72) | 31.7 % (13/41) | NS | NS |
 No | 75.2 % (85/113) | 65.3 % (47/72) | 68.3 % (28/41) | ||
Family history PTL/PPROM | |||||
 Yes | 23.3 % (24/127) | 46.6 % (62/133) | 43.1 % (28/65) | p < 0.001 | p < 0.001 |
 No | 76.7 % (103/127) | 53.4 % (71/133) | 56.9 % (37/65) | ||