Baseline characteristics of the included subjects
| Control | Intervention | P value | |||
| Intention-to-treat | As-treated | Intention-to-treat | As-treated | ||
| n=221 | n=122 | n=63 | |||
| Age group | 0.395 | 0.984 | |||
| Children | 48.9% (108) | 43.4% (53) | 46.0% (29) | ||
| Adults | 51.1% (113) | 56.6% (69) | 54.0% (34) | ||
| Male sex* | 35.7% (79) | 40.2% (49) | 31.7% (20) | 0.603 | 0.481 |
| Diagnosis | 0.873 | 0.438 | |||
| PV disease | 67.0% (148) | 65.6% (80) | 73.0% (46) | ||
| ToF | 46.2% (102) | 38.5% (47) | 47.6% (30) | ||
| AV disease | 29.9% (66) | 32.0% (39) | 25.4% (16) | ||
| PV+AV disease | 3.2% (7) | 2.5% (3) | 1.6% (1) | ||
| Educational level* | 0.153 | 0.613 | |||
| Elementary | 0.5% (1) | 1.7% (2) | 0.0% (0) | ||
| Lower vocational | 3.7% (8) | 7.7% (9) | 4.8% (3) | ||
| Lower secondary | 3.7% (8) | 6.0% (7) | 3.2% (2) | ||
| Intermediate vocational | 32% (70) | 33.3% (39) | 33.9% (21) | ||
| Higher secondary | 8.2% (18) | 10.3% (12) | 6.5% (4) | ||
| Higher vocational | 28.8% (63) | 28.2% (33) | 37.1% (23) | ||
| University | 23.3% (51) | 12.8% (15) | 14.5% (9) | ||
Data presented as ‘proportion (count)’.
*In the case of paediatric patients, sex and educational level relate to the parent that participated in the study.
AV, aortic valve; PV, pulmonary valve; ToF, tetralogy of Fallot.