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Table 2 Comparison of BF and Ktrans values across different clinical stages

From: The therapeutic utility of combining dynamic contrast-enhanced magnetic resonance imaging with arterial spin labeling in the staging of nasopharyngeal carcinoma

Staging classification

Cases

BFt

Ktranst

BFp

Ktransp

BFl

Ktransl

T stage

       

 T1 + T2

32

47.15 ± 17.94

0.79 ± 0.43

17.80 ± 5.59

0.69 ± 0.65

15.36 ± 2.80

0.21 ± 0.15

 T3 + T4

32

67.56 ± 14.58

1.24 ± 0.69

15.71 ± 2.90

0.81 ± 0.58

14.81 ± 1.87

0.19 ± 0.15

 t

 

− 4.905

− 3.113

1.873

− 0.789

0.926

0.495

 P

 

0.000*

0.003*

0.067

0.433

0.358

0.648

N stage

       

 N0 + N1

25

52.92 ± 21.17

0.82 ± 0.50

17.18 ± 5.01

0.82 ± 0.70

15.23 ± 2.67

0.21 ± 0.19

 N2 + N3

39

60.49 ± 17.30

1.14 ± 0.65

16.48 ± 4.26

0.70 ± 0.56

14.99 ± 2.22

0.20 ± 0.11

 t

 

− 1.565

− 2.071

0.601

0.759

0.388

0.371

 p

 

0.123

0.042*

0.550

0.451

0.700

0.712

AJCC stage

       

 I + II

13

40.70 ± 14.49

0.60 ± 0.37

18.40 ± 5.89

0.82 ± 0.87

15.64 ± 3.03

0.21 ± 0.18

 III + IV

51

61.82 ± 17.81

1.12 ± 0.62

16.34 ± 4.09

0.73 ± 0.54

14.94 ± 2.21

0.20 ± 0.14

 t

 

− 3.949

− 4.467

1.476

0.099

0.940

0.099

 p

 

0.000*

0.000*

0.145

0.921

0.351

0.921

  1. BFt tumor-BF; Ktranst tumor-Ktrans; BFp parotid gland-BF; Ktransp parotid gland-Ktrans; BFl lateral pterygoid muscle-BF; Ktransl lateral pterygoid muscle-Ktrans
  2. *P < 0.05