Table 5– Characteristics associated with asthma outcomes in soy plant workers^#

Outcome	Characteristic^¶	Outcome %	OR (95% CI)⁺
Current asthma^§	IgE to soy
	Negative^ƒ	6	1.0
	Positive	18	3.7 (1.0–13.2)
	Skin reaction to birch mix
	Negative^ƒ	6	1.0
	Positive	33	8.3 (1.5–39.5)
	Atopy^##
	Negative^ƒ	5	1.0
	Positive	15	3.1 (1.0–10.6)
Asthma-like symptoms	IgE to soy
	Negative^ƒ	33	1.0
	Positive	61	3.2 (1.4–7.7)
	Atopy^##
	Negative^ƒ	28	1.0
	Positive	52	2.8 (1.4–5.6)
Work-related asthma-like symptoms	IgE to soy
	Negative^ƒ	7	1.0
	Positive	32	5.9 (2.0–17.6)
	Current work classification
	Non-production^ƒ	2	1.0
	Production support	13	6.0 (0.9–118)
	Production	18	9.1 (1.7–169)
	Peak dust exposure category
	Low^ƒ	2	1.0
	Medium	15	7.0 (1.2–131)
	High	19	9.4 (1.6–178)

^#: a total of 147 workers participated in the survey, 135 of these were tested for immunoglobulin (Ig)E and 132 had skin prick testing, thus n<147 for some analyses due to missing data for some characteristics; ^¶: asthma outcomes were not associated with other potential explanatory variables in unadjusted analyses (race/ethnicity, sex, age, smoking status, having worked in an area with mould, tenure at the soy plant, history of ever working as a contractor, positive reaction on skin prick test to other tested extracts, elevated total IgE, soy-specific IgG, positive specific IgE to peanut, positive specific IgE to storage mite, inhalable dust exposure category and inhalable soy antigen exposure category); ⁺: unadjusted odds ratio and 95% likelihood ratio confidence intervals; ^§: self-reported. ^ƒ: referent; ^##: defined as self-reported history of nasal allergies and/or eczema.