Table 4.
Correlations between the percentage of low attenuation area (LAA %) and PFT measurements. The results when the non-COPD subjects were excluded were presented in parentheses.
| Pulmonary Function Test Measurements | ||||||
|---|---|---|---|---|---|---|
| RV/TLC (%) | RV (% pred.) | FEV1 | FEV1 (% pred.) | FEV1/FVC (%) | DLco (%pred.) | |
| RUL | 0.563, −945HU | 0.632, −930HU | −0.592, −950HU | −0.683, −940HU | −0.760, −925HU | −0.703, −950HU |
| (0.485, −945HU) | (0.573, −925HU) | (−0.546, −945HU) | (−0.615, −945HU) | (−0.718, −925HU) | (−0.696, −950HU) | |
| RML | 0.482, −960HU | 0.525, −945HU | −0.511, −965HU | −0.578, −955HU | −0.634, −945HU | −0.528, −965HU |
| (0.416, −965HU) | (0.460, −950HU) | (−0.482, −965HU) | (−0.522, −965HU) | (−0.585, −950HU) | (−0.511, −965HU) | |
| RLL | 0.579, −945HU | 0.629, −940HU | −0.582, −945HU | −0.674, −945HU | −0.735, −935HU | −0.625, −950HU |
| (0.524, −945HU) | (0.579, −935HU) | (−0.578, −940HU) | (−0.634, −945HU) | (−0.718, −935HU) | (−0.624, −955HU) | |
| LUL | 0.576, −950HU | 0.648, −935HU | −0.578, −960HU | −0.672, −950HU | −0.740, −935HU | −0.651, −955HU |
| (0.518, −950HU) | (0.607, −930HU) | (−0.552, −960HU) | (−0.627, −950HU) | (−0.715, −935HU) | (−0.648, −955HU) | |
| LLL | 0.565, −945HU | 0.621, −935HU | −0.544, −945HU | −0.660, −945HU | −0.708, −930HU | −0.563, −950HU |
| (0.511, −945HU) | (0.574, −935HU) | (−0.538, −945HU) | (−0.624, −945HU) | (−0.685, −930HU) | (−0.550, −950HU) | |
| Upper Lobe | 0.580, −950HU | 0.649, −935HU | −0.599, −960HU | −0.692, −950HU | −0.765, −935HU | −0.688, −955HU |
| (0.513, −950HU) | (0.600, −930HU) | (−0.567, −955HU) | (−0.639, −950HU) | (−0.735, −930HU) | (−0.688, −955HU) | |
| Lower Lobe | 0.590, −945HU | 0.644, −940HU | −0.582, −945HU | −0.689, −945HU | −0.744, −935HU | −0.619, −950HU |
| (0.539, −945HU) | (0.599, −935HU) | (−0.581, −940HU) | (−0.655, −945HU) | (−0.729, −935HU) | (−0.619, −950HU) | |
| Left Lung | 0.606, −950HU | 0.675, −935HU | −0.596, −955HU | −0.708, −945HU | −0.770, −935HU | −0.656, −955HU |
| (0.555, −950HU) | (0.639, −930HU) | (−0.586, −950HU) | (−0.675, −945HU) | (−0.755, −930HU) | (−0.660, −955HU) | |
| Right Lung | 0.601, −950HU | 0.669, −935HU | −0.619, −950HU | −0.721, −945HU | −0.794, −930HU | −0.707, −955HU |
| (0.537, −945HU) | (0.622, −930HU) | (−0.599, −945HU) | (−0.673, −945HU) | (−0.774, −930HU) | (−0.714, −950HU) | |
| Entire Lung | 0.613, −950HU | 0.681, −935HU | −0.618, −950HU | −0.726, −945HU | −0.795, −935HU | −0.696, −955HU |
| (0.556, −945HU) | (0.642, −930HU) | (−0.605, −945HU) | (−0.687, −945HU) | (−0.781, −930HU) | (−0.706, −955HU) | |
All r values have P < 0.001