Table 4 Correlations of ¹⁸F-FDG PET/CT parameters and clinical characteristics with the level of VTT

 Age (ys)

54.8 ± 12.8

56.0 ± 15.6

54.6 ± 12.3

0.750^a

 Gender

0.254^c

  Male

42(71.2%)

9(90.0%)

33(67.3%)

  Female

17(28.8%)

1(10.0%)

16(32.7%)

 Symptoms

0.333^c

  Presence

50(84.7%)

10(100.0%)

40(81.6%)

  Absence

9(15.3%)

0(0.0%)

9(18.4%)

 BMI (kg/m²)

25.2 ± 3.6

25.2 ± 2.9

25.2 ± 3.8

0.999^a

 Primary tumor SUVmax

6.6(4.3–10.4)

8.7(5.9–10.7)

6.0(4.2–10.8)

0.203^b

 VTT SUVmax

3.7(2.5–6.1)

6.5(5.3–8.8)

3.4(2.5–5.4)

0.002^b

 Primary tumor size (cm)

8.8 ± 2.5

9.4 ± 3.3

8.7 ± 2.4

0.450^a