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. 2022 May 4;9:855640. doi: 10.3389/fmed.2022.855640

TABLE 2.

Comparison of high-resolution computed tomography (HRCT) parameters between low-risk group and high-risk group.

Low-risk group High-risk group p value
LAA950ins (ml)
Left lung 77.92 ± 36.10 90.95 ± 32.09 0.02
Right lung 90.97 ± 39.57 107.04 ± 47.34 0.02
Entire lung 170.08 ± 74.94 195.97 ± 70.93 0.03
LVins (ml)
Left lung 1295.87 ± 271.28 1412.11 ± 277.34 0.02
Right lung 1494.76 ± 320.03 1619.00 ± 324.52 0.02
Entire lung 2806.53 ± 600.09 3041.12 ± 590.16 0.02
LAA 950ins %
Left lung 1.80 ± 1.73 5.69 ± 1.80 0.02
Right lung 5.94 ± 2.00 6.52 ± 2.48 0.11
Entire lung 5.92 ± 1.98 6.36 ± 1.70 0.15
MLDins(HU)
Left lung -751.66 ± 29.32 –765.70 ± 38.29 0.01
Right lung –747.36 ± 181.63 –761.52 ± 25.28 0.48
Entire lung –757.51 ± 4.25 –760.40 ± 5.02 0.04
LAA856exp (ml)
Left lung 162.34 ± 118.40 265.90 ± 127.46 0.00
Right lung (61.57,123.62) (140.49,371.61) 0.00
Entire lung 326.62 ± 209.61 582.05 ± 270.14 0.00
LVexp (ml)
Left lung 997.28 ± 266.62 1191.13 ± 275.22 0.00
Right lung 1103.39 ± 366.67 1398.92 ± 345.03 0.00
Entire lung 2104.40 ± 561.51 2612.62 ± 606.93 0.00
LAA856exp%
Left lung 14.75 ± 5.90 19.61 ± 6.59 0.00
Right lung 14.36 ± 6.14 21.54 ± 6.78 0.00
Entire lung 14.32 ± 6.14 21.25 ± 6.63 0.00
MLDexp (HU)
Left lung –732.76 ± 44.08 –745.26 ± 35.24 0.04
Right lung –738.13 ± 36.89 –754.69 ± 30.50 0.00
Entire lung –735.86 ± 39.10 –750.49 ± 31.91 0.01

Data are mean ± standard deviation or median (IQR). p values comparing low-risk group and high-risk group are from two-sample t-test, Mann-Whitney U test, χ2 or Fisher’s exact test. LAA–950ins: low attenuation areas less than-950HU on inspiratory CT scan, LVins: lung volume on inspiratory CT scan, LAA–950ins%: low attenuation areas less than-950HU to lung volume on inspiratory CT scan, MLDins: mean lung density on inspiratory CT scan, HU: housfield unites, LAA–856exp: low attenuation areas less than-856HU on expiratory CT scan, LVexp: lung volume on expiratory CT scan, LAA–856exp%: low attenuation areas less than-856HU to lung volume on expiratory CT scan, MLDexp: mean lung density on expiratory CT scan.