Frequency distribution of patients' knowledge about preventive measures
| Question | Correct(%) | Does not know (%) | Incorrect (%) |
| What is endocarditis? | 16.1 (14.9 to 17.3) | 72.6 (71.2 to 74.0) | 11.3 (10.3 to 12.3) |
| Indicate the most typical sign or symptom of endocarditis | 8.1 (7.2 to 9.0) | 69.4 (67.9 to 70.9) | 22.6 (21.3 to 23.9) |
| Can you only get endocarditis once in your lifetime? | 51.6 (50.0 to 53.2) | 43.5 (41.9 to 45.1) | 4.8 (4.1 to 5.5) |
| As you have a congenital heart disease, should you take antibiotics immediately if you have a temperature (without consulting a physician)? | 83.9 (82.7 to 85.1) | 3.2 (2.6 to 3.8) | 12.9 (11.8 to 14.0) |
| Do following factors contribute to the onset of endocarditis? | |||
| Needle contamination (drug addicts) | 51.6 (50.0 to 53.2) | 43.5 (41.9 to 45.1) | 4.8 (4.1 to 5.5) |
| Smoking | 32.3 (30.8 to 33.8) | 29.0 (27.6 to 30.4) | 38.7 (37.2 to 40.2) |
| Bacteria from skin infections | 35.5 (34.0 to 37.0) | 45.2 (43.6 to 46.8) | 19.4 (18.2 to 20.7) |
| Dental abscesses | 71.0 (69.6 to 72.4) | 25.8 (24.4 to 27.2) | 3.2 (2.6 to 3.8) |
| Sexual activity | 50.0 (48.4 to 51.6) | 46.8 (45.2 to 48.4) | 3.2 (2.6 to 3.8) |
| Poor nail and skin care | 9.7 (8.8 to 10.6) | 53.2 (51.6 to 54.8) | 37.1 (35.6 to 38.6) |
| Body piercing and tattooing | 29.0 (27.6 to 30.4) | 46.8 (45.2 to 48.4) | 24.2 (22.9 to 25.6) |
| Should you have a dental check up at least once a year? | 98.4 (98.0 to 98.8) | 1.6 (1.2 to 2.0) | 0.0 (0.0 to 0.0) |
| Should you take antibiotics before every visit to the dentist? | 83.9 (82.7 to 85.1) | 0.0 (0.0 to 0.0) | 16.1 (14.9 to 17.3) |
| Do bleeding gums need extra attention? | 88.7 (87.7 to 89.7) | 8.1 (7.2 to 9.0) | 3.2 (2.6 to 3.8) |
| Should you clean your teeth at least once a day? | 96.8 (96.2 to 97.4) | 1.6 (1.2 to 2.0) | 1.6 (1.2 to 2.0) |
| Are smoking and alcohol consumption more harmful for patients with congenital heart disease than for other people? | 21.0 (19.7 to 22.3) | 8.1 (7.2 to 9.0) | 71.0 (69.6 to 72.4) |
Values are percentage (95% confidence interval).