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Table 3 Baseline demographics of study participants (cases and controls) in the DZL All Age Asthma Cohort (ALLIANCE)

From: The all age asthma cohort (ALLIANCE) - from early beginnings to chronic disease: a longitudinal cohort study

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
  1. 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
  2. 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)
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