Table 4 Characteristics of tobacco-smoke exposed children and adolescentsa, ALSPAC
| Â | Children Cross-Sectional T1 (2000) | Adolescents Cross-Sectional T2 (2007) |
|---|---|---|
N | 259 | 259 |
Females (%) | 53.7 | 53.7 |
Age (years), mean (SDb) | 8.6 (0.2) | 15.4 (0.3) |
Height (cm), mean (SD) | 133.3 (6.0) | 170.2 (8.0) |
Weight (kg), mean (SD) | 31.3 (6.3) | 62.8 (11.0) |
BMI | 17.4 (2.5) | 21.7 (3.3) |
Maternal Education (%) | ||
 Ordinary Level or Lower | 56.4 | 56.4 |
 Advanced Level | 27.8 | 27.8 |
 University | 15.8 | 15.8 |
Asthmatics (%) | 21.6 | 28.9 |
Smoking Exposure (%) | ||
 In-utero smoking (smoking mother) | 25.1 | 25.1 |
 Second-hand exposure at home | 56.0 | 56.0 |
 Self-exposure (smoked > 2 times in a life-time) | 52.1 | 52.1 |
COPD [FEV1/FVC < LLNc] (%) | 5.0 | 4.6 |
Asthma medications in the last 12Â months (%) | 14.0 | 14.0 |
FVC(L), mean (SD) | 2.0 (0.3) | 3.9 (0.9) |
FEV1(L), mean (SD) | 1.7 (0.3) | 3.4 (0.7) |
FEV1/FVC(L), mean (SD) | 0.9 (0.06) | 0.9 (0.07) |