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Table 3 Conventional quantitative CT features analyses

From: Radiomic signature based on CT imaging to distinguish invasive adenocarcinoma from minimally invasive adenocarcinoma in pure ground-glass nodules with pleural contact

Quantitative indicators

IAC

MIA

P value

TLD (cm)

Median (25th to 75th percentile) cm

1.81 (1.40~2.56)

1.28 (0.85~1.87)

0.000

TSD (cm)

Median (25th to 75th percentile)

1.49 (1.09~2.10)

1.09 (0.79~1.61)

0.004

TVD (cm)

Median (25th to 75th percentile)

1.51 (1.23~2.13)

1.16 (0.79~1.42)

0.000

CT-LAP (HU)

Median (25th to 75th percentile)

−560.94(−625.01~− 477.06)

−620.45(− 655.94~− 551.01)

0.004

RCT-LAP (HU)

Median (25th to 75th percentile)

1.54 (1.38~1.72)

1.40 (1.32~1.55)

0.034

Normal lung density (HU)

Median (25th to 75th percentile)

− 868.79(− 890.52~ −841.36)

− 877.43(− 899.33~− 849.76)

0.218

  1. TLD Tumor length diameter on the largest axial plane, TSD Tumor short diameter on the largest axial plane, TVD Tumor vertical diameter on the largest coronal plane, CT-LAP CT value on the largest axial plane, RCT-LAP relative CT value on the largest axial plane, NLD-LAP normal lung density measured on the same plane with LAP, HU Hounsfield units