Table 2 Distribution of perinatal traits by maternal age groups (N = 22,950)
Perinatal traits | Groups of maternal age | |||
|---|---|---|---|---|
G1 (n = 11,282) < 30 years No. % | G2 (n = 7732) 30–34 years No. % | G3 (n = 3936) ≥35 years No. % | P-value | |
Preterm birth* | 2003 (17.8) | 1376 (17.8) | 1009 (25.6) | 0.001 |
Perinatal mortality* | 147 (1.3) | 86 (1.1) | 89 (2.3) | 0.001 |
LBW* | 1575 (14.0) | 985 (12.7) | 693 (17.6) | 0.001 |
IUGR* | 88 (0.8) | 56 (0.7) | 23 (0.6) | 0.4 |
LPI* | 434 (3.8) | 293 (3.8) | 165 (4.2) | 0.5 |
Low Apgar score* | 403 (3.6) | 247 (3.2) | 181 (4.6) | 0.001 |
Fetal hypoxia* | 255 (2.3) | 176 (2.3) | 88 (2.2) | 0.9 |
Macrosomia* | 555 (4.9) | 473 (6.1) | 212 (5.4) | 0.002 |
Congenital defects*a | 157 (1.4) | 85 (1.1) | 53 (1.3) | 0.1 |
Neonatal gender | ||||
 Male | 5975 (53) | 4133 (53.5) | 2170 (55.1) | 0.06 |
 Female | 5307 (47) | 3599 (46.5) | 1766 (44.9) |  |