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Table 1 Inter-observer consistency and comparisons of the absolute values of the parameters

From: Investigating the value of arterial spin labeling and intravoxel incoherent motion imaging on diagnosing nasopharyngeal carcinoma in T1 stage

 

ICC§ (95% confidence interval)

Tumor of T1 stage NPC

Mucosa of healthy control

P

z

AUC (95% confidence interval)

BF (mL/min/100 g)

0.994 (0.991–0.996)

81.85 ± 32.46

22.89 ± 6.84

<0.001

7.309

0.996 (0.944–1.000)

ADC (×10−3 mm2/s)

0.946 (0.915–0.966)

0.81 ± 0.12

1.08 ± 0.19

<0.001

−5.808

0.895 (0.803–0.953)

D (×10−3 mm2/s)

0.893 (0.831–0.932)

0.61 ± 0.10

0.83 ± 0.15

<0.001

−6.226

0.921 (0.836–0.970)

D* (×10−3 mm2/s)

0.894 (0.832–0.933)

26.21 ± 19.09

28.49 ± 18.50

0.341

−0.951

f

0.900 (0.842–0.936)

0.27 ± 0.11

0.34 ± 0.11

<0.001

−3.525

0.742 (0.628–0.835)

  1. § ICC is the abbreviation of Intra-class correlation
  2. All the values were calculated as the mean value of the measurements by two observers