Table 2.

Odds ratios (OR) and 95% confidence intervals (95% CI) for the association between reporting any occupational cold exposure and wheeze, chronic cough, or productive cough

Any occupational cold exposure (NRS > 1)	Wheeze	Chronic cough	Productive cough
	OR (95% CI)	OR (95% CI)	OR (95% CI)
Crude	1.1 (1.0–1.2)*	1.1 (1.0–1.2)*	1.2 (1.1–1.3)*
Restricted	1.2 (1.1–1.4)*	1.2 (1.1–1.3)*	1.3 (1.2–1.4)*
Model 1	1.3 (1.2–1.5)*	1.3 (1.1–1.4)*	1.3 (1.2–1.5)*
Model 2	1.3 (1.1–1.4)*	1.3 (1.1–1.4)*	1.3 (1.1–1.4)*
Model 3	1.3 (1.1–1.4)*	1.2 (1.1–1.4)*	1.3 (1.1–1.4)*

*Significant at the 0.05 level. Crude: All subjects (N = 12627); Restricted: Only currently working subjects (N = 8740); Model 1: Restricted group adjusted for gender, age and body mass index; Model 2: Model 1 adjusted for daily smoking; Model 3: Model 2 adjusted for asthma and chronic obstructive pulmonary disease