Table 1 Demographic and clinical characteristics of the study sample (n = 736)
Variables | Total sample (n = 736) Number (%) | EFA sample (n = 343) Number (%) | CFA sample (n = 393) Number (%) | |
|---|---|---|---|---|
Age (years), [mean(SD)] | 30.85Â (3.74) | 31.25 (4.10) | 30.44Â (3.12) | |
Educational level | Â | Â | Â | |
| Â | Less than junior middle school | 31Â (4.21) | 17 (4.96) | 14Â (3.56) |
| Â | High or technical secondary school | 49Â (6.66) | 24 (7.00) | 25Â (6.36) |
| Â | Junior college | 141Â (19.16) | 66 (19.24) | 75Â (19.08) |
| Â | Bachelor degree | 411Â (55.84) | 189 (55.10) | 222Â (56.49) |
| Â | Master degree or above | 104Â (14.13) | 47 (13.70) | 57Â (14.51) |
Nationality | Â | Â | Â | |
| Â | Han ethnic | 728Â (98.91) | 341 (99.42) | 387Â (98.47) |
| Â | Minority | 8Â (1.09) | 2(0.58) | 6Â (1.53) |
Registered residence | Â | Â | Â | |
| Â | Shanghai | 466Â (63.32) | 211 (61.52) | 255Â (64.89) |
| Â | Other provinces and cities | 270Â (36.68) | 132 (38.48) | 138Â (35.11) |
Mode of delivery | Â | Â | Â | |
| Â | Vaginal birth | 483Â (65.63) | 226 (65.89) | 257Â (65.39) |
| Â | Cesarean section | 253Â (34.37) | 117 (34.11) | 136Â (34.61) |
Newborn gender | Â | Â | Â | |
| Â | Male | 380Â (51.63) | 174 (50.73) | 206Â (52.42) |
| Â | Female | 356Â (48.37) | 169 (49.27) | 187Â (47.58) |
Neonatal birth weight (g), [mean(SD)] | 3215.15 (511.75) | 3293.47 (474.27) | 3140.57 (522.99) | |