Percent boys | 43.3% | 49.7%1-150 |
Age (years) | | |
Mean (SD) | 10.8 (1.1) | 10.2 (0.7)1-150
|
Range | 8–12 | 8–12 |
Height (cm) | | |
Mean (SD) | 135.0 (6.7) | 135.4 (7.0)1-150 |
Range | 111–158 | 114–155 |
Weight (kg) | | |
Mean (SD) | 28.2 (4.4) | 28.1 (4.8)1-150
|
Range | 20–54 | 17–50 |
Body mass (kg/m2) | | |
Mean (SD) | 15.3 (1.4) | 15.2 (1.7) |
Range | 12.4–23.7 | 11.2–22.7 |
Lung function
|
Rural (n=480)
|
Urban (n=577)
|
FEV1 (l) | | |
Mean (SD) | 1.60 (0.29) | 1.66 (0.28)1-150
|
Range | 0.55–3.01 | 0.80–2.78 |
FVC (l) | | |
Mean (SD) | 1.91 (0.35) | 1.99 (0.34)1-150
|
Range | 0.85–3.48 | 1.13–3.27 |
FEV1/FVC (%) | | |
Mean (SD) | 84.3 (8.0) | 83.5 (6.9) |
Range | 44.9–155.2 | 57.6–100.0 |
Age, sex and size adjusted lung function level (FEV1 and FVC)1-151 |
FEV1 (% predicted) | | |
Mean | 100.7 | 99.4 |
95% CI | 99.5 to 101.9 | 98.4 to 100.5 |
FVC (% predicted) | | |
Mean | 100.5 | 99.6 |
95% CI | 99.4 to 101.7 | 98.5 to 100.6 |