Table 4.
Correlations between IPVV and other parameters.
| Pulmonary vascular measurement | Emphysema index | Airway measurements | |||||||
|---|---|---|---|---|---|---|---|---|---|
| LAA%–950 | WA%3 | WA%4 | WA%5 | WA%6 | WT3 | WT4 | WT5 | WT6 | |
| Inspiration | |||||||||
| IPVVRUL | 0.238 (0.025) | −0.099 (0.362) | −0.124 (0.256) | −0.062 (0.575) | −0.157 (0.176) | 0.233 (0.030) | 0.257 (0.017) | 0.391 (<0.001) | 0.415 (<0.001) |
| IPVVRML | 0.221 (0.037) | −0.142 (0.192) | −0.272 (0.013) | −0.236 (0.037) | −0.101 (0.437) | 0.280 (0.009) | 0.258 (0.019) | 0.372 (0.001) | 0.257 (0.043) |
| IPVVRLL | 0.409 (<0.001) | −0.109 (0.311) | 0.045 (0.684) | 0.100 (0.364) | 0.219 (0.045) | 0.448 (<0.001) | 0.460 (<0.001) | 0.422 (<0.001) | 0.557 (<0.001) |
| IPVVLUL | 0.353 (0.001) | −0.027 (0.802) | −0.046 (0.678) | 0.031 (0.776) | −0.021 (0.852) | 0.383 (<0.001) | 0.351 (0.001) | 0.401 (<0.001) | 0.425 (<0.001) |
| IPVVLLL | 0.406 (<0.001) | −0.036 (0.745) | 0.079 (0.470) | 0.181 (0.096) | 0.087 (0.434) | 0.440 (<0.001) | 0.487 (<0.001) | 0.481 (<0.001) | 0.432 (<0.001) |
| Expiration | |||||||||
| IPVVRUL | 0.265 (0.012) | 0.137 (0.218) | −0.030 (0.793) | −0.144 (0.248) | 0.073 (0.589) | 0.370 (0.001) | 0.394 (<0.001) | 0.422 (<0.001) | 0.418 (0.001) |
| IPVVRML | 0.241 (0.023) | −0.160 (0.157) | −0.186 (0.124) | −0.167 (0.213) | −0.093 (0.631) | 0.308 (0.005) | 0.260 (0.030) | 0.242 (0.070) | 0.256 (0.181) |
| IPVVRLL | 0.362 (<0.001) | −0.027 (0.807) | −0.091 (0.425) | 0.153 (0.184) | 0.158 (0.182) | 0.529 (<0.001) | 0.383 (<0.001) | 0.527 (<0.001) | 0.504 (<0.001) |
| IPVVLUL | 0.361 (0.001) | 0.040 (0.717) | 0.088 (0.437) | −0.051 (0.665) | −0.048 (0.718) | 0.417 (<0.001) | 0.455 (<0.001) | 0.446 (<0.001) | 0.566 (<0.001) |
| IPVVLLL | 0.355 (0.001) | −0.266 (0.016) | 0.139 (0.238) | −0.178 (0.140) | 0.199 (0.146) | 0.474 (<0.001) | 0.441 (<0.001) | 0.481 (<0.001) | 0.535 (<0.001) |
IPVV, the intrapulmonary vascular volume; LAA%−950, the percentage of lung area with CT attenuation values < -950HU; WT3−6, airway wall thickness of the 3–6th generations; WA%3−6, the percentage of the airway wall area of the 3–6th generations. All P-values were presented in parentheses.