Associations between cumulative lifetime occupational exposure and clinical and functional outcome.

Abbreviations: GOLD, Global Initiative for Chronic Obstructive Lung Disease; MMRC, Modified Medical Research Council; SGRQ, St George’s Respiratory Questionnaire. Multivariate logistic or linear regression models, adjusted for sex, age, age 2, weight, smoking status, and pack-years smoked. Referral category for all comparisons includes participants with no history of high exposure to biological dust, mineral dust, or gases/fumes (n = 110; see Table 2). * As compared to MMRC dyspnea scale 0, 1 or 2. †As compared to GOLD Stage.