Table 1 Study population characteristics
Total | GDM-negative | GDM | |
|---|---|---|---|
Number | 48,787 (100%) | 47,787 (97.95%) | 1000 (2.05%) |
Age (mean ± SD) | 31.2 ± 4.99 | 31.1 ± 4.98 | 33.3 ± 5.00 |
Age (years) | |||
15–19 | 408 (0.8%) | 3 (0.3%) | |
20–29 | 17,774 (37.2%) | 241 (24.1%) | |
30–39 | 27,618 (57.8%) | 651 (65.1%) | |
40- | 1987 (4.2%) | 105 (10.5%) | |
Pre-pregnancy BMI (mean) | 21.2 ± 3.22 | 21.1 ± 3.15 | 23.7 ± 5.12 |
Pre-pregnancy BMI (kg/m2 ± SD) | |||
< 18.5 | 7750 (16.2%) | 95 (9.5%) | |
18.5- < 25 | 35,373 (74.0%) | 590 (59.0%) | |
≧25 | 4664 (9.8%) | 315 (31.5%) | |
Parity (time) | 0.87 ± 0.89 | 0.87 ± 0.89 | 0.92 ± 0.96 |
gestational weight gain (kg) | 10.3 ± 3.93 | 10.4 ± 3.89 | 7.89 ± 5.16 |
Gestational age at delivery (weeks) | 38.8 ± 1.47 | 38.8 ± 1.47 | 38.5 ± 1.62 |
Birth weight (g) | 3027 ± 407 | 3027 ± 406 | 3028 ± 444 |
Placenta weight (g) | 563 ± 119 | 563 ± 119 | 574 ± 121 |