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COPD-6, 4000 seriesDOI:
10.12688/wellcomeopenres.25945.1This study protocol describes a large cross-sectional investigation of physical activity, inactivity, sleep, and multimorbidity in urban and rural Malawi. The Vitalograph COPD-6 handheld spirometer was included to assess lung function and identify obstructive airways disease through measurements of FEV₁, FEV₆, and FEV₁/FEV₆ ratio.
