Table 5. Demographic characteristics for exomphalos infants and their mother during 2006–2015.
| Characteristics | Exomphalos |
|---|---|
| No. of cases | 516 |
| Time of diagnosis (%) | |
| During pregnancy | 412 (79.8) |
| Within 7 days after delivery | 104 (20.2) |
| Mother | |
| Maternal age (%) | |
| <25 | 131 (25.4) |
| 25–30 | 185 (35.8) |
| ≥30 | 200 (38.8) |
| No. of pregnancy (SD) | 1.8 (1.2) |
| No. of live births (SD) | 0.7 (0.7) |
| Race (%) | |
| Han | 459 (89.0) |
| Others | 57 (11.0) |
| Income level† (%) | |
| < 600 yuan | 28 (5.4) |
| 600–1200 yuan | 69 (13.4) |
| 1200–2400 yuan | 110 (21.3) |
| ≥ 2400 yuan | 309 (59.9) |
| Education level (%) | |
| Elementary school or less | 30 (5.8) |
| Middle school | 239 (46.3) |
| High school | 114 (22.1) |
| College or above | 133 (25.8) |
| Infant | |
| Gestational age, week (SD) | 25.6 (8.6) |
| Birth weight, gram (SD) | 1236.2 (1164.4) |
| Sex (%) | |
| Male | 254 (49.2) |
| Female | 221 (42.8) |
| Unknown | 41 (8.0) |
| Multiple births (%) | |
| Yes | 20 (3.9) |
| No | 496 (96.1) |
SD, standard deviation.
†Income level was presented as per person per year.