Table 2—

Risk for current asthma# relative to office workers: random population sample of 30 study centres of the European Community Respiratory Health Survey

CleaningHigh MWLow MW
All2.47 (1.7–3.6)1.81 (1.2–2.7)1.36 (1.0–1.8)
Females2.53 (1.7–3.8)1.45 (0.8–2.5)1.16 (0.7–2.0)
Males2.19 (0.9–5.5)2.37 (1.3–4.2)1.51 (1.1–2.1)
Age 20–34 yrs1.81 (1.0–3.3)1.35 (0.8–2.3)1.26 (0.9–1.8)
Age 35–44 yrs3.42 (2.1–5.6)2.68 (1.5–4.8)1.47 (1.0–2.3)
Nonsmokers2.28 (1.4–3.8)1.64 (1.0–2.8)1.36 (1.0–1.9)
Current smokers2.72 (1.6–4.7)1.88 (1.0–3.5)1.41 (0.9–2.2)
Nonatopics3.62 (2.1–6.3)1.53 (0.8–3.1)2.06 (1.3–3.2)
Atopics2.17 (1.1–4.4)1.76 (0.9–3.4)1.06 (0.7–1.7)*
  • Data are presented as odds ratios (OR) (95% confidence interval), adjusted for sex, age category, current smoking and study centre

  • In stratified analyses, ORs were adjusted for the other listed host factors in the table, minus the stratifying factor and atopy

  • See table 1 for n numbers

  • MW: molecular weight

  • #: attack of asthma in the past 12 months, and/or woken by an attack of shortness of breath in the last 12 months, and/or current use of asthma medication

  • *: p<0.05 for multiplicative interaction