Incidence rate of HF in patients with CHD compared with matched controls according to a hierarchical classification
| Lesion group | HF/total | (%) | IR/105 years* | 95% CI |
| Group 1 | 157/2,022 | −7.8 | 348.9 | 297.5 to 406.8 |
| Group 2 | 117/1,087 | −9.4 | 503.3 | 418.2 to 600.9 |
| Group 3 | 54/1,306 | −4.1 | 154.4 | 117.2 to 199.8 |
| Group 4 | 139/4,369 | −3.2 | 123.2 | 104.0 to 145.0 |
| Group 5 | 36/2,405 | −1.5 | 54.4 | 38.7 to 74.4 |
| Group other | 226/10,793 (2.1) | 74.9 | 65.6–85.1 | |
| All groups | 729/21,982 | −3.4 | 124.8 | 115.8 to 133.9 |
Group 1 was defined as patients with conotruncal defects, including common arterial trunk, transposition of the great arteries, tetralogy of Fallot or aortopulmonary septum defect. Group 2 was defined as patients with nonconotruncal defects, including endocardial cushion defects, common ventricle and hypoplastic left heart syndrome. Group 3 was defined as patients with coarctation of the aorta. Group 4 was defined as patients with ventricular septal defects. Group 5 was defined as patients with atrial septal defects. Group other included all other heart and circulatory system anomalies and all other CHD diagnosis that were not included in the other five lesion groups.
*Mean IR in controls 1.2/105 years.
CHD, congenital heart disease; HF, heart failure;IR, incidence rate, new cases per 100; patient years.