Table 1 Sociodemographic and Obstetric Characteristics of 238,598 Pregnant Women in Hebei Province, China
|  | 10–19 years (n = 3679) | 20–34 years (n = 234,919) | F/χ2 | P |
|---|---|---|---|---|
Marital status | ||||
 Married | 3492 (94.9) | 234,033 (99.6) |  |  |
 Single | 187 (5.1) | 886 (0.4) | 1791.693 | 0.000 |
Education (year) | ||||
 ≤ 6 | 222 (6.1) | 4258 (1.8) |  |  |
 7–9 | 2265 (62.2) | 79,550 (34.3) |  |  |
 10–12 | 899 (24.7) | 70,870 (30.5) |  |  |
 > 12 | 253 (7.0) | 77,343 (33.3) | 1946.923 | 0.000 |
Delivery place | ||||
 Tertiary Hospital | 950 (25.8) | 108,383 (46.1) |  |  |
 Secondary Hospital | 2722 (74.0) | 126,348 (53.8) |  |  |
 Primary Hospital | 0 (0.0) | 19 (0.0) |  |  |
 Home | 7 (0.2) | 163 (0.1) | 607.250 | 0.000 |
Prenatal care | 5.6 (2.2) | 6.8 (2.4) | 889.906 | 0.000 |
Parity | ||||
 0 | 3328 (90.5) | 127,414 (54.3) |  |  |
 1 | 315 (8.6) | 98,078 (41.8) |  |  |
 ≥ 2 | 35 (1.0) | 9324 (4.0) | 1918.563 | 0.000 |
History of miscarriage | 421 (11.4) | 59,531 (25.4) | 372.160 | 0.000 |
Chronic hypertension | 15 (0.4) | 1352 (0.6) | 1.790 | 0.181 |
Gestational age (weeks) | 38.9 (1.9) | 38.9 (1.5) | 0.000 | 0.993 |
Birth weight (g) | 3204 (509) | 3344 (491) | 292.171 | 0.000 |