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) | |
* = Frequency and percentage of only ‘Yes’ value presented, LBW Low birth weight, IUGR Intrauterine growth restriction, LPI Low ponderal index, low Apgar score (< 7), fetal hypoxia (a pathophysiological condition in which the fetus is suffering from insufficient oxygen supply), aCongenital defects (microtia, anotia, polydactyly, heart defects, limb reduction defects, cleft lip, cleft palate, hydrocephaly, and NTDs), p-values were calculated using chi-square test