Table 1.
Characteristics of the validation study subjects, non-participating validation study women and Born in Guangzhou Cohort Study (BIGCS) cohort population.
| Validation Subjects | Non-Participants | Cohort Population | p1 † | p2 ‡ | |
|---|---|---|---|---|---|
| n | 210 | 210 | 10,165 | ||
| Age (years) | 29.0 ± 3.2 | 29.8 ± 3.7 | 28.9 ± 3.4 | 0.174 | 0.674 |
| Education level | 0.584 | <0.001 * | |||
| High school or below | 10 (4.8) | 11 (5.2) | 1053 (11.2) | ||
| College | 44 (21.0) | 48(22.9) | 2371 (25.3) | ||
| Undergraduate or above | 156 (74.3) | 151(71.9) | 5947 (63.5) | ||
| Monthly income (Yuan) | 0.958 | 0.265 | |||
| <1500 | 18 (8.9) | 31 (15.4) | 961 (10.5) | ||
| 1500–4500 | 62 (30.5) | 48 (23.9) | 2983 (32.5) | ||
| 4501–9000 | 87 (42.9) | 79 (39.3) | 3763 (41.0) | ||
| ≥9001 | 36 (17.7) | 43 (21.4) | 1468 (16.0) | ||
| Pre-pregnancy BMI (kg/m2) # | 0.132 | 0.838 | |||
| <18.5 | 46 (22.2) | 38 (18.5) | 2303 (24.8) | ||
| 18.5–23.9 | 146 (70.5) | 143 (69.8) | 6087 (65.7) | ||
| ≥24 | 15 (7.2) | 24 (11.7) | 879 (9.5) | ||
| Parity | 0.544 | 0.002 * | |||
| 0 | 170 (81.7) | 173 (84.0) | 8309 (88.6) | ||
| ≥1 | 38 (18.3) | 33 (16.0) | 1071 (11.4) |
BIGCS, Born in Guangzhou Cohort Study; BMI, body mass index; GDM, gestational diabetes mellitus; † p-value of the differences between the validation study subjects and non-participating validation study women; ‡ p-value of the differences between the validation study subjects and cohort population; * Significantly different from the BIGCS cohort population, p < 0.01 (t-tests or Kruskal-Wallis Test). Values are reported as mean ± standard deviation or n (%); # Pre-pregnancy body mass index (BMI) (kg/m2) was divided into three groups according to the Guidelines for Prevention and Control of Overweight and Obesity in Chinese Adults [20].