Multivariate Models of Associations between Daily Step Count and Number of Acute Exacerbations and COPD-Related Hospitalizations Adjusting for FEV₁ % Predicted and Prednisone for AE in Previous Year.^*

FEV1 denotes forced expiratory volume in 1 second; AE acute exacerbation; and ref reference group. *N = 168. †Two separate multivariate models. Model 1 examines daily step count as a continuous variable. Model 2 examines daily step count in quartiles.