Baseline characteristics
| Systemic RV All (n=162) | CCTGA (n=41) | TGA after atrial switch (n=121) | P value | |
| Age in years (mean, SD) | 28.8 (4.6) | 28.0 (5.9) | 29.1 (4.0) | 0.22 |
| Living in an emerging country | 15 (9.2) | 8 (19.5) | 7 (5.8) | 0.02 |
| Primigravida | 86 (52.8) | 22 (53.7) | 64 (52.9) | 1.00 |
| Current smoking | 7 (5.0) | 2 (5.4) | 5 (5.0) | 1.00 |
| Prior diabetes mellitus | 2 (1.2) | 0 (0) | 2 (1.7) | 1.00 |
| Prior hypertension | 2 (1.2) | 1 (2.4) | 1 (0.8) | 0.43 |
| Signs of heart failure before pregnancy | 8 (4.9) | 3 (7.3) | 5 (4.1) | 0.42 |
| Cardiac medication before pregnancy | 53 (32.5) | 16 (39.0) | 37 (30.6) | 0.34 |
| Systemic RV dilatation | 41 (25.3) | 13 (31.7) | 28 (23.1) | 0.30 |
| Systemic RV ejection fraction <40% | 44 (27.0) | 9 (22.0) | 35 (28.9) | 0.42 |
| Pulmonary hypertension | 4 (2.5) | 1 (2.4) | 3 (2.5) | 0.99 |
Values are n (%) if not otherwise stated. P value for comparison between CCTGA and TGA.
CCTGA, congenitally corrected transposition of the great arteries; RV, right ventricle.