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Table 3 Subgroup analysis for the diagnostic performance of DWI on overall level

From: Utility of diffusion weighted imaging with the quantitative apparent diffusion coefficient in diagnosing residual or recurrent hepatocellular carcinoma after transarterial chemoembolization: a meta-analysis

Characteristic No.of Studies Sensitivity
(95% CI)
Specificity
(95% CI)
I2 index of Sensitivity/Specificity AUC (95% CI) P Value
All studies 12 0.85(0.74–0.92) 0.83(0.75–0.88) 85.0/65.3 0.90(0.87–0.92)  
Study design
 Retrospective 5 0.80(0.73–0.86) 0.81(0.71–0.88) 0.00/69.6 0.86(0.83–0.89) 0.68
 Prospective 7 0.91(0.69–0.98) 0.82(0.74–0.88) 92.1/67.5 0.88(0.85–0.90)  
b value
 < 800 5 0.88(0.69–0.96) 0.92(0.83–0.96) 67.5/0.00 0.93(0.91–0.95) 0.40
 ≥ 800 6 0.85(0.75–0.92) 0.76(0.66–0.83) 58.8/49.2 0.87(0.83–0.89)  
Threshold method
 visual 6 0.82(0.71–0.89) 0.82(0.67–0.91) 38.663.1 0.88(0.85–0.90) 0.47
 ADC 6 0.87(0.65–0.96) 0.85(0.76–0.91) 92.9/72.7 0.90(0.87–0.92)  
  1. P value: Comparasion of AUC value between different subgroup analyses