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Table 2 Characteristics of lesions in the training set and the testing set

From: Survival time prediction in patients with high-grade serous ovarian cancer based on 18F-FDG PET/CT- derived inter-tumor heterogeneity metrics

 

Training set ( n = 208)

Testing set ( n = 84)

p-valuea

Lymph node metastasis (LNM)

 Pelvic LNM

74(35.58%)

25(29.76%)

0.34

 Middle abdominal LNM

63(30.29%)

35(41.67%)

0.06

 Upper abdominal LNM

61(29.33%)

30(35.71%)

0.29

 Distant LNM

26(12.50%)

16(19.05%)

0.15

Number of metastatic implants

6.00(3.00,8.00)

5.50(3.25,8.00)

0.14

Location of metastatic implants

 AR-5 (left lower)

142(68.27%)

46(54.76%)

0.04*

 AR-6 (pelvis)

173(83.17%)

75(89.29%)

0.19

 AR-7 (right lower)

131(62.98%)

47(55.95%)

0.27

 AR-4 (left flank)

88(42.31%)

35(41.67%)

0.92

 AR-0 (central)

95(45.67%)

37(44.05%)

0.80

 AR-8 (right flank)

147(70.67%)

55(65.48%)

0.38

 AR-3 (left upper)

129(62.02%)

57(67.86%)

0.42

 AR-2 (epigastrium)

87(41.83%)

41(48.81%)

0.28

 AR-1 (right upper)

141(67.79%)

61(72.62%)

0.42

Pattern of invasion

  

0.74

 0 No invasion

23(11.06%)

13(15.48%)

 

 1 Nodular type

42(20.19%)

18(21.43%)

 

 2 Predominantly nodular type

51(24.52%)

18(21.43%)

 

 3 Predominantly infiltrate type

52(25.00%)

17(20.24%)

 

 4 Infiltrate type

40(19.23%)

18(21.43%)

 
  1. Abbreviations: LNM Lymph Node Metastasis, AR area
  2. aDifferences in clinical characteristics were compared using Student’s t-test or Mann–Whitney U test or chi-square test. “*” represents statistically significant