Table 4—

Case-case analyses among subjects with current asthma: lung function indices in selected occupational groups

Office#CleaningHigh MWLow MW
Subjects n5438263179
FEV1 mL3352−97 (72)−151 (83)+37 (60)
FVC mL4242−50 (75)−144 (86)−13 (62)
FEV1/FVC %79.3−1.44 (1.12)−1.77 (1.27)+0.67 (0.90)
PEF L·s−1+7.56−0.57 (0.19)*−0.63 (0.22)*−0.04 (0.16)
  • Data are presented as mean difference between occupational group and office workers (sem) unless otherwise stated

  • MW: molecular weight

  • FEV1: forced expiratory volume in one second

  • FVC: forced vital capacity

  • PEF: peak expiratory flow

  • #: mean value standardised for sex, age and height

  • : values adjusted for sex, age, height, smoking status and study centre

  • +: missing data for three subjects

  • *: p<0.05