TABLE 5

Adjusted relationships of income to baseline computed tomography measures

Coefficient (95% CI)p>|t|
Baseline emphysemaModel R2 0.3287
 Baseline FEV1−5.91 (−6.24– −5.58)<0.0001
 Height0.15 (0.11–0.18)<0.0001
 Current smoking−2.95 (−3.47– −2.44)<0.0001
 Female−4.16 (−4.80– −3.53)<0.0001
 Age at recruitment−0.075 (−0.11– −0.042)<0.0001
 Education beyond high school−0.91 (−1.42– −0.40)<0.0001
 Lower income−0.82 (−1.37– −0.27)0.004
 African American−2.21 (−2.81– −1.61)<0.0001
 Smoking pack-years0.012 (0.0023–0.022)0.015
Baseline gas trappingModel R2 0.4874
 Baseline FEV1−14.67 (−15.30– −14.03)<0.0001
 Height0.39 (0.33–0.46)<0.0001
 Current smoking−3.92 (−4.93– −2.92)<0.0001
 Female−9.78 (−11.02– −8.54)<0.0001
 Age at recruitment0.74 (0.011–0.14)0.022
 Education beyond high school−1.38 (−2.36– −0.37)0.007
 Lower income1.00 (−0.089–2.10)0.072
 African American−5.19 (−6.40– −3.99)<0.0001
 Smoking pack-years0.023 (0.0031–0.042)0.023
Baseline airway wall thicknessModel R2 0.2928
 Baseline FEV1−0.10 (−0.11– −0.095)<0.0001
 Height0.0036 (0.0027–0.0045)<0.0001
 Current smoking0.080 (0.066– 0.094)<0.0001
 Female−0.18 (−0.20– −0.17)<0.0001
 Age at recruitment−0.0020 (−0.0028– −0.0011)<0.0001
 Education beyond high school−0.018 (−0.032– −0.0048)0.008
 Lower income0.021 (0.0062– 0.036)0.005
 African American−0.07 (−0.083– −0.051)<0.0001
 Smoking pack-years0.00069 (0.00042–0.00095)<0.0001

FEV1: forced expiratory volume in 1 s.