Table 1 Characteristics of PTL/PTB Mothers Compared with Non-PTL/PTB Mothers at Delivery
PTL/PTB mothers | Non-PTL/PTB mothers | P –valuea | |
|---|---|---|---|
N = 2147 | N = 8778 | ||
N (%) | N (%) | ||
Year of delivery | 0.3403 | ||
2009 | 395 (18.4) | 1645 (18.7) | |
2010 | 420 (19.6) | 1726 (19.7) | |
2011 | 413 (19.2) | 1819 (20.7) | |
2012 | 472 (22.0) | 1778 (20.3) | |
2013 | 447 (20.8) | 1810 (20.6) | |
Maternal age at deliveryb | < 0.0001 | ||
12–18 years | 48 (2.2) | 95 (1.1) | |
19–30 years | 1276 (59.4) | 5194 (59.2) | |
31–35 years | 496 (23.1) | 2232 (25.4) | |
36–44 years | 327 (15.2) | 1257 (14.3) | |
Nulliparousc | 1360 (63.3) | 5224 (59.5) | 0.0011 |
Caesarean section | 885 (41.2) | 2769 (31.5) | < 0.0001 |
Birth plurality | < 0.0001 | ||
Singleton | 1969 (91.7) | 8709 (99.2) | |
Twin | 173 (8.1) | 64 (0.0) | |
Other multiple | 5 (0.0) | 3 (0.0) | |
Charlson Comorbidity Indexd | 0.0142 | ||
0 | 1750 (81.5) | 7332 (83.5) | |
1 | 315 (14.7) | 1155 (13.2) | |
2 | 54 (2.5) | 230 (2.6) | |
3 | 21 (1.0) | 41 (0.5) | |
4+ | 7 (0.3) | 20 (0.2) | |
Selected comorbiditiesd | |||
Gestational diabetes | 237 (11.0) | 893 (10.2) | 0.2378 |
Hypertension | 93 (4.3) | 243 (2.8) | 0.0002 |
Depression | 83 (3.9) | 334 (3.8) | 0.8950 |
Hypotension | 66 (3.1) | 268 (3.1) | 0.9597 |
Diabetes mellitus | 50 (2.3) | 113 (1.3) | 0.0004 |