Table 4

Association between ever exposure to biological dust, mineral dust, gases/fumes and VGDF stratified by current asthma

ExposuresCurrent asthmaticsNon-asthmaticsInteraction
p Value*
Fixed AO-GOLDFixed AO-GOLD
No
% (n/N)
Yes
% (n/N)
RR (95% CI)No
% (n/N)
Yes % (n/N)RR (95% CI)
Biological dust63%
(167/265)
55.6%
(25/45)
0.68 (0.35 to 1.34)53.6%
(512/955)
75%
(51/68)
2.80 (1.48 to 5.27) 0.003
Mineral dust56 .%
(149/266)
53.3%
(24/45)
0.70 (0.35 to 1.38)50.9%
(486/955)
69.1%
(47/68)
1.80 (0.98 to 3.32) 0.03
Gases/fumes76.3%
(203/266)
71.1%
(32/45)
0.61 (0.29 to 1.29)69.6%
(665/955)
86.8%
(59/68)
2.92 (1.27 to 6.67) 0.005
VGDF79.7%
(212/266)
73.3%
(33/45)
0.57 (0.26 to 1.22)74.1%
(708/955)
86.8%
(59/68)
2.33 (1.01 to 5.34) 0.01
  • The bolded text identifies results reaching statistical significance (p≤0.05).

  • *p≤0.05 for the interaction between exposure and current asthma.

  • †Adjusted for sex, smoking, pack-years, childhood and adulthood socioeconomic status, and all pesticides as coexposure.

  • No interaction was observed with exposure to all pesticides, herbicides and insecticides (results not shown).

  • AO, airflow obstruction; GOLD, Global Obstructive Lung Disease; RR, relative risk; VGDF, vapour, gases, dust and fumes.