CT Densitometry as a Predictor of Pulmonary Function in Lung Cancer Patients

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.