Table 4.
The R value (P value) of the correlation analysis between CT indicators and symptoms/lung function of COPD.
| Variables | FEV1% | Acute exacerbations in 1 year | CAT score | mMRC score | CDPD classification | MEF25% | MEF50% | MMEF% |
|---|---|---|---|---|---|---|---|---|
| WA% | −0.863 (0.000) | 0.611 (0.000) | 0.635 (0.000) | 0.735 (0.000) | 0.561 (0.000) | −0.418 (0.02) | −0.505 (0.00) | −0.295 (0.032) |
| TDR | −0.890 (0.000) | 0.811 (0.000) | 0.725 (0.000) | 0.749 (0.000) | 0.464 (0.000) | −0.439 (0.01) | −0.427 (0.01) | −0.330 (0.016) |
| %LAA−950 | −0.846 (0.000) | 0.810 (0.000) | 0.709 (0.000) | 0.760 (0.000) | 0.331 (0.016) | −0.426 (0.01) | −0.313 (0.023) | −0.392 (0.04) |
CAT = COPD Assessment Test, COPD = Chronic obstructive pulmonary disease, FEV1% = ratio of measurement to prediction of forced expiratory volume to the first second, %LAA−950 = percentage of low attenuation areas less than −950 Hounsfield units, MEF25% = ratio of measured maximum expiratory flow at 25% of FVC to predicted value, MEF50% = ratio of measured maximum expiratory flow at 50% of FVC to predicted value, MMEF% = ratio of measured maximal mid expiratory flow to predicted value, mMRC = Modified Medical Research Council Dyspnea Scale, TDR = thickness–diameter ratio, WA% = percentage of wall area.