Table 3.
Baseline demographics of study participants (cases and controls) in the DZL All Age Asthma Cohort (ALLIANCE)
| Demographic data – Paediatric Arm, N = 540 |
Median | Interquartile range |
|---|---|---|
| Age at baseline study date, yrs | 6.6 | 3.1–11.4 |
| Number | Proportion (%) | |
| Sex, male | 341 | 63.1 |
| Current smokera | 2 | 0.9 |
| Demographic data – Adult Arm, N = 255 |
Median | Interquartile Range |
| Age at baseline study date, yrs | 52.0 | 43.0–64.0 |
| Number | Proportion (%) | |
| Sex, male | 117 | 45.9 |
| Smokerb | 60 | 23.5 |
| Non-smokerb | 195 | 76.5 |
aIn the pediatric arm only children aged 8 years or more were asked for their smoking habits (n = 224). Data were missing for n = 12 children
bIn the adult arm current smokers and former smokers with at least 10 pack years (PY) smoking history were defined as ‘smokers’ (n = 16 (26.7%) and n = 44 (73.3%), respectively); non-smokers could be either never-smokers, or former smokers with less than 10PY. Among all adult former smokers and current smokers, mean (range) cumulative tobacco exposure was 9.5 PY (4–20)