Table 1 Distribution of singleton sample characteristics by maternal age groups in Taiwan
Characteristic | Maternal age (years) | p-value | |||||
|---|---|---|---|---|---|---|---|
≤15 | 16–19 | 20–24 | |||||
(n = 1,199) | (n = 38,716) | (n = 295,675) | |||||
no. | (%) | no. | (%) | no. | (%) | ||
Year of labor | <0.001 | ||||||
2002 | 219 | (18.3) | 7,482 | (19.3) | 48,793 | (16.5) | |
2003 | 187 | (15.6) | 6,114 | (15.8) | 45,014 | (15.2) | |
2004 | 154 | (12.8) | 5,173 | (13.4) | 40,903 | (13.8) | |
2005 | 114 | (9.5) | 4,425 | (11.4) | 35,239 | (11.9) | |
2006 | 116 | (9.7) | 3,462 | (8.9) | 31,279 | (10.6) | |
2007 | 101 | (8.4) | 3,050 | (7.9) | 25,635 | (8.7) | |
2008 | 84 | (7.0) | 2,633 | (6.8) | 21,560 | (7.3) | |
2009 | 70 | (5.9) | 2,301 | (5.9) | 17,626 | (6.0) | |
2010 | 88 | (7.3) | 2,005 | (5.2) | 14,553 | (4.9) | |
2011 | 66 | (5.5) | 2,071 | (5.4) | 15,073 | (5.1) | |
Institution levels | <0.001 | ||||||
Medical center | 178 | (14.8) | 2,623 | (6.8) | 23,119 | (7.8) | |
Regional hospital | 322 | (26.9) | 8,865 | (22.9) | 67,159 | (22.7) | |
District hospital | 249 | (20.8) | 10,482 | (27.1) | 82,286 | (27.8) | |
Obstetrics/gynecology clinic | 450 | (37.5) | 16,746 | (43.2) | 123,111 | (41.7) | |
Institution ownership | <0.001 | ||||||
Public | 124 | (10.3) | 3,138 | (8.1) | 22,152 | (7.5) | |
Private for-profit | 660 | (55.1) | 25,773 | (66.6) | 198,997 | (67.3) | |
Non-profit proprietary | 415 | (34.6) | 9,805 | (25.3) | 74,526 | (25.2) | |
Institution location | <0.001 | ||||||
Northern | 514 | (42.9) | 15,574 | (40.2) | 122,089 | (41.3) | |
Central | 239 | (19.9) | 9,056 | (23.4) | 70,248 | (23.7) | |
Southern | 369 | (30.8) | 12,068 | (31.2) | 94,280 | (31.9) | |
Eastern | 77 | (6.4) | 2,018 | (5.2) | 9058 | (3.1) | |
Physician gender | 0.011 | ||||||
Female | 121 | (10.1) | 3,364 | (8.7) | 24,744 | (8.4) | |
Male | 1,078 | (89.9) | 35,352 | (91.3) | 270,931 | (91.6) | |
Physician age, mean (SD) | 44.7 | (7.1) | 44.7 | (6.8) | 44.4 | (6.5) | <0.001 |
Parity of birth | <0.001 | ||||||
1 | 1,176 | (98.1) | 34,435 | (88.9) | 231,580 | (78.3) | |
≥2 | 23 | (1.9) | 4,281 | (11.1) | 64,095 | (21.7) | |
Low-income family status | 79 | (6.6) | 1,061 | (2.7) | 3,408 | (1.2) | <0.001 |
Delivery mode | <0.001 | ||||||
Caesarean delivery | 308 | (25.7) | 8,812 | (22.8) | 80,475 | (27.2) | |
Virginal delivery | 891 | (74.3) | 29,904 | (77.2) | 215,200 | (72.8) | |