Table 1.
Characteristics of live births
| Characteristics | N = 1,347,672 |
|---|---|
| Paternal age, y | |
| < 25, n (%) | 75,119 (6) |
| 25–29, n (%) | 328,463 (24) |
| 30–34, n (%) | 520,954 (39) |
| 35–39, n (%) | 301,149 (22) |
| 40–44, n (%) | 93,068 (7) |
| 45–49, n (%) | 21,974 (2) |
| ≥ 50, n (%) | 6945 (1) |
| Maternal age, y | |
| < 20, n (%) | 23,195 (2) |
| 20–24, n (%) | 185,607 (14) |
| 25–29, n (%) | 487,567 (36) |
| 30–34, n (%) | 474,148 (35) |
| 35–39, n (%) | 156,352 (12) |
| ≥ 40, n (%) | 20,803 (2) |
| Maternal nationality | |
| Immigrant, n (%) | 88,025 (7) |
| Taiwanese, n (%) | 1,259,647 (93) |
| Income | |
| Dependents or 1st quartile, n (%) | 328,224 (24) |
| 2nd quartile, n (%) | 340,771 (25) |
| 3rd quartile, n (%) | 339,904 (25) |
| 4th quartile, n (%) | 338,773 (25) |
| Route of delivery | |
| Vaginal, n (%) | 892,366 (66) |
| Cesarean, n (%) | 455,306 (34) |
| Gestational hypertension or preeclampsia,n (%) | 30,526 (2) |
| Eclampsia,n (%) | 944 (0) |
| Infant sex | |
| Boy, n (%) | 704,523 (52) |
| Girl, n (%) | 643,149 (48) |
| Sex ratio | 1.10 |
| Mean gestational age,wk (SD) | 38 (2) |
| Preterm birth,n (%) | 92,663 (7) |
| Mean birthweight,g (SD) | 3112 (426) |
SD standard deviation