From: Paired inspiratory-expiratory chest CT scans to assess for small airways disease in COPD
Correlations | ||||||
---|---|---|---|---|---|---|
N | Mean (SD) | Exp−856 | E/I MLA | RVC856-950 | Residual | |
FEV1 % predicted | 1185 | 41.2 (19.9) | −0.69‡ | −0.73‡ | −0.73‡ | −0.16‡ |
FVC % predicted | 1185 | 75.7 (21.1) | −0.49‡ | −0.56‡ | −0.57‡ | −0.17‡ |
FEV1/FVC | 1185 | 0.40 (0.12) | −0.66‡ | −0.62‡ | −0.62‡ | −0.08* |
FEF25-75 | 1185 | 0.42 (0.38) | −0.56‡ | −0.61‡ | −0.61‡ | −0.18‡ |
FRC/TLC ratio | 1188 | 0.69 (0.12) | 0.80* | 0.93* | 0.87* | 0.44* |
6MWD | 1135 | 1116 (404) | −0.31‡ | −0.40‡ | −0.43‡ | −0.01NS |
Exacerbation frequency | 1188 | 0.8 (1.2) | 0.10† | 0.12‡ | 0.13‡ | −0.02NS |
SGRQ total | 1188 | 44.9 (19.9) | 0.32‡ | 0.41‡ | 0.43‡ | 0.09* |
MMRC dyspnea | 1183 | 2.5 (1.3) | 0.34‡ | 0.38‡ | 0.42‡ | 0.01NS |