Table 1 Maternal characteristics per groups of age
From: Impact of aging on obstetric outcomes: defining advanced maternal age in Barcelona
|  | < 30 years n = 2437 | 30–34 years n = 9643 | 35–39 years n = 9887 | 40–44 years n = 2807 | ≥45 years n = 280 | p |
|---|---|---|---|---|---|---|
GA at delivery | 39.5 ± 1.7 | 39.5 ± 1.7 | 39.4 ± 1.7 | 39.2 ± 1.7 | 38.6 ± 1.7 | < 0,001 |
Multiparous | 7.4%(181) | 17.1%(1647) | 26.8%(2652) | 27.5%(771) | 9.3% (26) | < 0,001 |
Previous c-section | 1.9%(46) | 4.4%(423) | 7.2%(707) | 8.8%(247) | 6.1% (17) | < 0,001 |
Chronic hypertension | 0.4% (10) | 0.4% (38) | 0.4% (37) | 0.8% (22) | 3.6% (10) | < 0,001 |
Pregestational diabetes | 0.6% (15) | 0.7%(65) | 0.6%(63) | 1.0% (29) | – | 0,115 |
Thrombophilias | 0.5% (12) | 0.6%(61) | 1.3%(126) | 1.7%(48) | 2.9% (8) | < 0,001 |
ART | 1.5% (36) | 3.5%(341) | 6.9%(683) | 17.2%(484) | 77.5%(217) | < 0,001 |
Smoking | 13.7%(285) | 9.6%(828) | 8.4%(756) | 9.5%(238) | 8.6% (22) | < 0,001 |
Obesity | 6.0%(147) | 4.3%(418) | 4.7%(468) | 5.9%(167) | 6.4% (18) | < 0,001 |