Table 3 Factors associated with self-reported VGDF discordance, over-reporting and under-reporting in 199 subjects with the same job in both interviews
FactorsDiscordant VGDF, n = 199 OR (95% CI)Over-report VGDF,* n = 49/182 OR (95% CI)Under-report VDGF,† n = 17/150 OR (95% CI)
Age, per 10 years2.2 (1.4 to 3.6)1.1 (0.7 to 1.8)0.8 (0.4 to 1.5)
Female2.5 (1.2 to 5.5)0.9 (0.4 to 1.9)2.4 (0.7 to 8.8)
White, non-Hispanic0.6 (0.3 to 1.4)0.9 (0.4 to 2.0)1.0 (0.3 to 3.2)
High school graduate or less0.6 (0.2 to 2.0)0.6 (0.1 to 2.4)0.3 (0.0 to 2.6)
Never smoked vs ever smoked0.8 (0.4 to 1.5)0.7 (0.3 to 1.5)2.2 (0.6 to 8.8)
Selected trades‡ vs all others1.1 (0.4 to 2.6)0.3 (0.1 to 1.1)4.0 (1.2 to 13.5)
Disease status
    Asthma with rhinitis (referent)1.01.01.0
    Asthma only0.8 (0.3 to 2.0)0.7 (0.2 to 2.1)1.2 (0.3 to 4.7)
    Rhinitis only3.6 (1.4 to 9.0)3.9 (1.6 to 9.4)0.6 (0.1 to 5.3)
  • *Over-report indicates self-reported VGDF, JEM classification low. Excludes 17 subjects who under-reported VGDF exposure.

  • †Under-report indicates no self-reported VGDF, JEM classification moderate–high. Excludes 49 subjects who over reported VGDF exposure.

  • ‡Selected trades covers technicians, service jobs, manufacturing, construction and agriculture.

  • VGDF, vapours, gas, dust and fumes.