Frequency distribution of patients' knowledge about reproductive issues
| Question | Correct(%) | Does not know(%) | Incorrect (%) |
| What is the chance that your children will have congenital heart disease? | 25.8 (24.4 to 27.2) | 32.3 (30.8 to 33.8) | 41.9 (40.3 to 43.5) |
| Which contraceptives are the most advisable for you to use in the light of your congenital heart disease? (only for women): | |||
| Contraceptive pill | 80.0 (74.8 to 85.2) | 20.0 (14.8 to 25.2) | 0.0 ( 0.0 to 0.0) |
| Intrauterine device | 26.7 (20.9 to 32.5) | 53.3 (46.8 to 59.8) | 20.0 (14.8 to 25.2) |
| Are you at risk of deterioration during pregnancy? (only for women) | 86.7 (82.3 to 91.1) | 0.0 ( 0.0 to 0.0) | 13.3 ( 8.9 to 17.7) |
Values are percentage (95% confidence interval).