Table 5—

Prevalence of wheezing and hay fever and association with high endotoxin exposure within five agricultural sectors

	Subjects n	Group median endotoxin exposure EU·m⁻³	Wheezing		Hay fever
	Subjects n	Group median endotoxin exposure EU·m⁻³	%	OR (95% CI)	%	OR (95% CI)
Flower bulb workers	126	180	7.1	2.13 (0.48–9.38)	8.7	0.38 (0.09–1.59)
Animal feed workers	114	320	15.8	1.78 (0.56–5.67)	9.7	0.52 (0.14–1.95)
Onion workers	97	4100	16.5	1.95 (0.62–6.15)	6.2	0.18 (0.02–1.62)
Vegetable seed workers	36	280	11.1	2.67 (0.14–50.3)	30.6	1.05 (0.12–9.18)
Farmers	504	220	10.5	2.41 (1.08–5.39)	10.5	0.52 (0.28–0.95)

Data are presented as the odds ratio (OR) for high (above group median) versus low (below group median) endotoxin exposure with 95% confidence interval (CI), unless otherwise stated. ORs were adjusted for age, smoking habits, sex and farm childhood. EU: endotoxin unit.