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Bland-Altman plot of agreement between measured and self-reported body mass index (BMI) among 2005 Canadian Community Health Survey subsample responders with chronic obstructive pulmonary disease. Horizontal lines show the mean difference (+1.28 kg/m2) and 95% limits of agreement (−3.96 kg/m2, +6.52 kg/m2) between measured and self-reported BMI
