Table 5

Prevalence ratios of eye and nose symptoms in Cox's regression models with two exposure variables corrected for sex, smoking, and age

Exposure		n^5-150		Prevalence ratio (95% CI)^5-151 of exposure category
Exposure		n^5-150		Medium^5-152	High^5-152
Eye symptoms:
Fungal spores	84	8.3 (0.90 to 78)	5.2 (0.55 to 50)
Inorganic dust		5.3 (0.60 to 47)	4.3 (0.43 to 42)
Nose symptoms:
Endotoxins	89	1.1 (0.26 to 5.0)	2.2 (0.56 to 9.0)
Fungal spores		3.1 (0.62 to 16)	4.2 (0.79 to 23)
Endotoxins	89	0.82 (0.15 to 4.4)	2.1 (0.38 to 12)
Dust		5.0 (0.79 to 32)	3.0 (0.38 to 23)
Endotoxins	84	1.4 (0.33 to 5.9)	2.9 (0.66 to 13)
Silica		4.0 (0.82 to 20)	3.3 (0.60 to 18)
Fungal spores	89	3.1 (0.64 to 15)	3.8 (0.73 to 20)
Dust		3.7 (0.76 to 18)	2.8 (0.53 to 15)
Fungal spores	84	3.5 (0.74 to 17)	3.4 (0.68 to 17)
Silica		3.4 (0.70 to 16)	3.7 (0.74 to 19)
Dust	84	3.3 (0.64 to 17)	2.3 (0.37 to 14)
Silica		3.1 (0.62 to 16)	3.7 (0.63 to 22)

↵5-150 Number of workers with complete data on both exposure variables, sex, age, and smoking.
↵5-151 Prevalence ratios with the low exposure categories as reference.
↵5-152 Levels of the low, medium, and high exposure categories are given in table 4.