Table 2 CT quantified characteristics in all datasets

From: Deep learning CT model for stratified diagnosis of pancreatic cystic neoplasms: multicenter development, validation, and real-world clinical impact

Characteristics

Training set (n = 999)

Validation set (n = 250)

test 1 (n = 173)

test 2 (n = 289)

test 3 (n = 124)

Age, years, Median (IQR)

56.0(23.0)

55.0(23.0)

57.0(25.0)

56.0(20.0)

63.0(12.0)

Sex, male, n(%)

439.0(43.9)

103(.041.2)

77.0(44.5)

117.0(40.5)

71.0(57.3)

Total pancreatic volume, cm3, Median (IQR)

80.5(68.6)

80.7(65.9)

79.2(56.7)

70.4(36.7)

57.5(32)

Net pancreatic volume, cm3, Median (IQR)

77.2(64.4)

77.1(64.4)

78.2(52.5)

68.8(35.6)

54.8(29.8)

Maximum diameter of the MPD in the pancreatic head, mm, Median (IQR)

4.0(5.5)

4.0(5.1)

4.0(3.8)

2.8(2.5)

2.0(2.0)

Maximum diameter of the MPD in the pancreatic body, mm, Median (IQR)

4.0(6)

4.0(4.6)

4.5(5.5)

2.0(4.5)

2.0(2.0)

Maximum diameter of the MPD in the pancreatic tail, mm, Median (IQR)

2.0(4.9)

2.0(4.5)

2.8(4.9)

2.0(2.8)

2.0(2.0)

The number of patients with tumors in the pancreatic head, n(%)

432.0(43.2)

104.0(41.6)

69(39.9)

111(38.4)

70.0(56.5)

Maximum diameter of the tumor, mm, Median (IQR)

33.4(27.6)

32.1(27)

32.0(26.7)

33.4(30.9)

28.9(19.9)

The average attenuation of solid tumor component in arterial phase on the largest tumor cross-section, HU, Median (IQR)

53.6(14.9)

53.3(14.7)

52.0(14.5)

50.0(12.9)

49.3(11.9)

The average attenuation of solid tumor component in portal phase on the largest tumor cross-section, HU, Median (IQR)

59.3(20.5)

58.3(18.7)

59.4(19.3)

57.2(23.8)

50.2(17.9)

Solid component volume of the tumor, mm3, Median (IQR)

4093.2(12314.5)

3397.2(9528.4)

3270.1(9891.8)

4663.6(12682.4)

2404.1(6428.3)

Solid component volume ratio, n(%)

0.5(0.5)

0.5(0.5)

0.5(0.4)

0.4(0.5)

0.3(0.4)

The maximum attenuation of solid tumor component volume in portal phase, HU, Median (IQR)

60.1(19.8)

59.9(18.4)

60.2(17.9)

59.2(23.2)

52.8(16.9)

  1. Note: Categorical variables are expressed as the number of cases (%), and continuous variables as the median (interquartile range).
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