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Population Attributable Risk for chronic cough (i.e., prevalence of chronic cough attributable to different risk factors) by BOLD study site. Each risk factor is represented by a different colour: red, current smoking; pink, passive smoking; grey, dusty job; light blue, obesity; green, education; brown, tuberculosis; yellow, hypertension; dark blue, FEV1/FVC < LLN; and white, unexplained.
