Table 2.
Rates of pregnancy-induced hypertension, multiple pregnancy and Caesarean section among deliveries to subjects with and without gestational diabetes and pre-existing diabetes in South Korea, stratified by year of delivery
| Year | Group | Age ≥ 35 years, n (%) | Pre-existing hypertension, n (%) | Multiple pregnancy, n (%) | Caesarean section, n (%) |
|---|---|---|---|---|---|
| 2010 | Normal (n = 427 243) | 69 441 (16.3) | 4730 (1.1) | 5865 (1.4) | 151 106 (35.4) |
| Gestational diabetes (n = 20 985) | 5554 (26.5) | 517 (2.5) | 428 (2.0) | 8965 (42.7) | |
| Pre-existing diabetes (n = 11 614) | 3596 (31.0) | 763 (6.6) | 307 (2.6) | 5858 (50.4) | |
| P | < 0.001 | < 0.001 | < 0.001 | < 0.001 | |
| 2011 | Normal (n = 404 414) | 69 878 (17.3) | 4137 (1.0) | 5867 (1.5) | 144 348 (35.7) |
| Gestational diabetes (n = 27 290) | 7410 (27.2) | 505 (1.9) | 609 (2.2) | 11 358 (41.6) | |
| Pre-existing diabetes (n = 10 521) | 3327 (31.6) | 702 (6.7) | 232 (2.2) | 5417 (51.5) | |
| P* | < 0.001 | < 0.001 | < 0.001 | < 0.001 | |
| 2012 | Normal (n = 339,918) | 62 574 (18.4) | 3301 (1.0) | 5886 (1.7) | 125 617 (37.0) |
| Gestational diabetes (n = 30 441) | 8393 (27.6) | 591 (1.9) | 744 (2.4) | 12 655 (41.6) | |
| Pre-existing diabetes (n = 10 072) | 3481 (34.6) | 653 (6.5) | 356 (3.5) | 5186 (51.5) | |
| P* | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
*
Differences among normal, gestational diabetes and pre-existing diabetes pregnancy groups, compared using the chi-squared test.