Table 1 Baseline characteristics of children according to school, Salamanca, 2004 - 2005
School 1 n = 239 | School 2 n = 225 | p | |
|---|---|---|---|
Gender (female/male) | 118/121 | 117/108 | 0.60 |
Age (years) | 9.0 ± 1.6 | 9.2 ± 1.5 | 0.11 |
Weight (k) | 34.8 ± 11.4 | 36.4 ± 11.6 | 0.13 |
Height (cm) | 134.0 ± 10.8 | 135.5 ± 10.6 | 0.08 |
BMI | 19.1 ± 3.7 | 19.1 ± 3.6 | 0.75 |
Previous diseases and symptoms n (%) | |||
Bronchitis | 29 (12.1) | 24 (10.6) | 0.74 |
Pneumonia | 17 (7.1) | 9 (4.0) | 0.14 |
Cough | 219 (91.6) | 207 (86.6) | 0.16 |
Acute asthma | 3 (1.2) | 0 (0.0) | 0.34 |
Acute respiratory tract infections | 221 (92.4) | 178 (79.1) | 0.001 |
Hospitalization for asthma | 2 (0.8) | 0 (0.0) | 0.60 |
Hospitalization for acute respiratory tract infections | 13 (5.4) | 5 (2.0) | 0.07 |
FEV1 (%p)* | 102.5 ± 21.1 | 101.5 ± 14.4 | 0.55 |
FVC (%p)* | 109.3 ± 23.7 | 109.2 ± 18.0 | 0.95 |
FEV1/FVC (c) | 92.6 ± 9.8 | 91.6 ± 10.0 | 0.24 |
PEFR (%p) | 106.5 ± 26.7 | 107.1 ± 24.3 | 0.81 |