Baseline characteristics of the study sample
| Demographics | CHD | Controls | ||
| Parent proxy report | Child report | Parent proxy report | Child report | |
| N (%) | N (%) | N (%) | N (%) | |
| All | 308 | 155 | 719 | 585 |
| Age group | ||||
| 2–4 years | 147 (47.7) | – | 133 (18.5) | – |
| 5–7 years | 67 (21.8) | 64 (41.3) | 121 (16.8) | 121 (20.7) |
| 8–12 years | 52 (16.9) | 50 (32.3) | 244 (34.0) | 244 (41.7) |
| 13–18 years | 42 (13.6) | 41 (26.5) | 221 (30.7) | 220 (37.6) |
| Gender | ||||
| Male | 166 (53.9) | 90 (58.1) | 344 (47.8) | 280 (47.9) |
| Female | 142 (46.1) | 65 (41.9) | 375 (52.2) | 305 (52.1) |
| Domicile | ||||
| Urban | 71 (23.1) | 34 (21.9) | 504 (70.1) | 416 (71.1) |
| Rural | 237 (76.9) | 121 (78.1) | 215 (29.9) | 169 (28.9) |
| Socioeconomic class* | ||||
| Upper | 16 (5.2) | 9 (5.8) | 19 (2.6) | 11 (1.9) |
| Upper middle | 138 (44.8) | 63 (40.6) | 320 (44.5) | 266 (45.5) |
| Lower middle | 103 (33.4) | 55 (35.5) | 252 (35.0) | 204 (34.9) |
| Upper lower | 51 (16.6) | 28 (18.1) | 128 (17.8) | 104 (17.8) |
| Functional class categories | |||
| Acyanotic CHD 1 | 1 | 151 (49.0) | 64 (41.3) |
| 2 | 5 (1.6) | 3 (1.9) | |
| Cyanotic CHD | 1 | 77 (25.0) | 36 (23.2) |
| 2 | 13 (4.2) | 10 (6.5) | |
| 3 | 52 (16.9) | 38 (24.5) | |
| Others | 10 (3.2) | 4 (2.6) | |
*Socioeconomic class was defined by the modified Kuppuswamy’s Scale 2012.13
CHD, congenital heart disease.