Table 1

Characteristics of the underlying study population

Variablesn (%)
Age group (years) (n=3903)
 18–341663 (42.6)
 35–641733 (44.4)
 65+507 (13.0)
Gender (n=3898)
 Male2087 (53.5)
 Female1811 (46.5)
Residence (n=3855)
 City775 (20.1)
 Town590 (15.3)
 Rural2490 (64.6)
Insurance (n=3905)
 Public3679 (94.2)
 Private219 (5.6)
 No insurance7 (.2)
Type of congenital heart defect (CHD) (n=4014)
 Complex congenital heart defects581 (14.5)
 Primary pretricuspid shunts621 (15.5)
 Primary post-tricuspid shunts406 (10.1)
 Right heart/pulmonary artery anomalies526 (13.1)
 Left heart/aortic anomalies898 (22.4)
 Miscellaneous CHD602 (15.0)
 Unclassifiable380 (9.5)
Warnes class (n=2778)
 Simple1722 (62.0)
 Moderate650 (23.4)
 Severe406 (14.6)