Baseline characteristics of the study subjects
| Characteristics | Mean±SD | Range or proportion |
| Age (years) | 10.78±2.63 | 5–15 |
| Males | 3301 | 52.65% |
| No of family members | 6.31±2.1 | 2–22 |
| No of rooms | 2.91±1.8 | 1–21 |
| Government school | 1908 | 30.43% |
| Body mass index (kg/m2) | 15.0±2.2 | 4.3–38.2 |
| Waist circumference (cm) | 53.0±10.2 | 16–106 |
| Height (cm) | 136.7±15.9 | 90–180 |
| Weight (kg) | 28.8±9.4 | 8–94 |
| Overcrowding (>4 persons in a room) | 1201 | 19.15% |
| Any murmur | 82 | 1.31% |