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Table 3 Comparative study between endoanal ultrasound and MRI in detection of the internal opening

From: Role of endoanal ultrasound in the assessment of perianal fistula in correlation with MRI fistulography

  Internal opening (MRI) Cohen’s kappa coefficient P value
Yes No
Count % Count %
Internal opening (endoanal ultrasound)
 Yes 96 100.0 16 66.7 0.444 < 0.001
 No 0 0.0 8 33.3