A cross-sectional descriptive study was performed to analyze the correlations (Spearman) among forced expiratory volume in one second (FEV1), body mass index (BMI), chest radiography (CXR), chest tomography (CT), and 6MWT Z score (Z-6MWT). Clinically stable CF patients, aged 6-21 years, were included.
34 patients, 14F/20M, mean age 12.1 卤 4.0 years were studied. The mean Z-6MWT was 鈭?#xA0;1.1 卤 1.106. The following correlations versus Z-6MWT were found: FEV1 (r = 0.59, r2 = 0.32, p = 0.0002), BMI Z score (r = 0.42, r2 = 0.17, p = 0.013), CXR (r = 0.34, r2 = 0.15, p = 0.0472) and CT (r = 鈭?#xA0;0.45, r2 = 0.23, p = 0.0073).
In conclusion there was a significant, but poor, correlation between the six minute walk test Z score and the cystic fibrosis severity markers currently in use.