Table 1.: Correlation Between Pulmonary Function Measures and CT Parameters

TLV Mean Density Volume (-900 to -500 HU) Volume (<-900HU)
FVC % of predicted r=-.051, p=.661 r=-.047, p=.687 r=.003, p=.983 r=.050, p=.665
FEV1/FVC r=-.420, p=.000 r=.485, p=.000 r=.192, p=.095 r=-.456, p=.000
MMEF 75-25% % of predicted r=-.187, p=.104 r=.284, p=.012 r=.191, p=.096 r=-.270, p=.018
MEF 50% % of predicted r=-.211, p=.066 r=.342, p=.002 r=.231, p=.043 r=-.329, p=.003
PEF % of predicted r=-.076, p=.512 r=.202, p=.078 r=.206, p=.073 r=-.162, p=.160
FET r=.343, p=.002 r=-.311, p=.005 r=-.058, p=.614 r=.334, p=.003
DLCO/VA % of predicted r=-.245, p=.032 r=.376, p=.001 r=.150, p=.194 r=-.246, p=.031

Given is the correlation coefficient r, as well as the p value. Statistically significant data (p<0.05) are highlighted in bold type. FVC: forced vital capacity; FEV1: forced expiratory volume in one second; MMEF 75-25% : mean mid-expiratory flow between 75% and 25% of the FVC; MEF 50%: maximum expiratory flow at 50% of the FVC; PEF: peak expiratory flow; FET: forced expiratory time; DLCO/VA: diffusion capacity for carbon monoxide corrected for alveolar volume.