Table 2—

Prevalence odds ratios(POR) of asthma (with or without atopy) and chronic bronchitis in European Community Respiratory Health Survey II participants by occupational class and education level

POR (95%CI)
AsthmaAsthma with atopyAsthma without atopyChronic bronchitis
Subjects n6965#201849477915
Minimally adjusted+
 Occupational class§
  Iƒ1111
  II1.16 (0.91–1.47)1.15 (0.82–1.60)1.10 (0.77–1.57)1.43 (0.94–2.17)
  III1.26 (1.01–1.56)1.15 (0.83–1.60)1.44 (1.06–1.95)1.71 (1.17–2.51)
  IV–V1.07 (0.83–1.36)0.91 (0.63–1.30)1.26 (0.89–1.79)1.84 (1.23–2.74)
  VI1.37 (1.00–1.88)1.07 (0.67–1.72)1.55 (1.00–2.41)1.62 (0.97–2.69)
 Educational level
  Highƒ1111
  Medium1.02 (0.82–1.26)0.74 (0.54–1.00)1.39 (1.01–1.93)1.54 (1.05–2.25)
  Low1.19 (0.93–1.43)0.93 (0.70–1.25)1.70 (1.26–2.29)1.93 (1.35–2.76)
Fully adjusted##
 Occupational class§
  Iƒ1111
  II1.13 (0.88–1.42)1.08 (0.75–1.54)1.13 (0.78–1.65)1.43 (0.91–2.23
  III1.25 (0.99–1.57)1.22 (0.87–1.72)1.34 (0.97–1.85)1.53 (1.01–2.34)
  IV–V1.08 (0.78–1.48)0.91 (0.57–1.46)1.20 (0.77–1.88)1.66 (0.96–2.87)
  VI1.25 (0.84–1.86)1.16 (0.63–2.14)1.28 (0.75–2.19)1.24 (0.56–2.75)
 Educational level
  Highƒ1111
  Medium1.02 (0.81–1.28)0.75 (0.53–1.05)1.40 (1.00–1.97)1.59 (1.04–2.42)
  Low1.20 (0.95–1.52)1.10 (0.79–1.52)1.55 (1.18–2.14)1.66 (1.10–2.50)
  • CI: confidence interval. #: Only subjects with serum immunoglobulin E measurements were included (except bronchitis category); : excludes Tartu (Estonia) centre; +: for age, sex and centre; §: I for managers and professionals, II for technicians and associate professionals, III for other nonmanual workers, IV for skilled manual workers, V for semi-skilled/unskilled manual workers and VI for unclassifiable/unknown; ƒ: reference category; ##: for age, sex, country, body mass index, family history of asthma, number of siblings, exposure to environmental tobacco smoke, smoking status, respiratory infections before 5 yrs of age, mould or mildew in the home in the previous 12 months, rhinitis and high occupational exposure to pollutants.