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) |