Fig. 4.

Lung function, by sex and place of residence, Uganda, 2015–2016

FEV₁: forced expiratory volume in 1 second; FVC: forced vital capacity.

Notes: The figure shows pre-bronchodilator FEV₁/FVC ratio z-score distribution. Each bar represents a 0.2 increment in z-score. Bars that include the 5^th, 10^th, 25^th, 50^th, 75^th, 90^th or 95^th percentile in each distribution are labelled accordingly. The z-scores were calculated using data for the African American reference population in the United States’ National Health and Nutrition Examination Survey (NHANES).