Prevalence of chronic obstructive pulmonary disease in Saudi Arabia

ABSTRACT

To assess the prevalence of epidemiologically defined chronic obstructive pulmonary disease [COPD] in Saudi Arabia. This cross-sectional, observational, population-based survey of COPD was conducted between June 2010 and December 2011 across the country of Saudi Arabia. A total of 56,000 randomly selected telephone numbers were called, which identified 10,001 eligible subjects; of whom 9,779 agreed to participate. A screening questionnaire included 6 questions related to cigarette consumption and water-pipe use was administered to each participant. Subjects with positive screening results were invited to provide input for a detailed COPD questionnaire. The adjusted proportion of subjects who reported a current, or past smoking history was 27.9%. Gender specific smoking rates adjusted by age were 38.7% [95% confidence interval [CI] 37.5-39.9%] in men, and 7.4% [95% CI 6.5-8.3%] in women. The epidemiological definition of symptomatic COPD was met by a total of 249 subjects. The age and gender-adjusted prevalence of COPD was 2.4% [95% CI 2.1-2.7%]. Overall, COPD was more frequently documented [p<0.0001] in men [3.5% [95% CI 3-4%]] than in women [1% [95% CI 0.7-1.3%]]. The prevalence of epidemiologically defined COPD in the general population of Saudi Arabia is 2.4%, which is lower than that reported in industrialized countries