Respiratory Symptoms and Lung Function among Danish Construction Workers. A Cross-Sectional Study

Abstract

Objective: This study investigated whether Danish construction workers had an increased prevalence of chronic obstructive pulmonary disease (COPD) or affected lung function and if the prevalence differed between types of jobs within construction. Methods: A cross-sectional study of 899 Danish male workers: demolition workers, insulators, carpenters and a control group of hospital porters aged 35-60 years answered a questionnaire and performed spirometry. Results were tested statistically for differences between occupational groups, and all analyses were adjusted for smoking status, age and body mass index. Results: COPD (Global Initiative on Obstructive Lung Disease 2-4) was found in 2.4% of carpenters, 4.7% of insulators, 7.8% of demolition workers and 6.1% of hospital porters (P = 0.055). Compared to hospital porters, demolition workers had significantly increased odds of coughing more than average [odds ratio (OR) = 2.2, 95% confidence interval (CI) 1.2-3.8] and carpenters had significantly lower odds of forced expiratory volume in one second below the lower limit of normal (i.e. FEV 1 < LLN) (OR = 0.5, 95% CI 0.2-0.9). The OR of FEV1 < LLN for demolition workers compared to carpenters was 2.7 (95% CI 1.3-5.5) and for insulators compared to carpenters was 1.8 (95% CI 0.8-3.9). Demolition workers had significantly lower odds compared to all other groups for forced vital capacity < LLN.