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Table 1 Demographic features of PIA and NIA groups

From: Diffusion-weighted imaging in the evaluation of perianal fistula and abscess

 PIANIASignificance level
Age38.4 ± 10 years35 ± 6.6 years0.2
Gender17 males, 1 female18 males, 2 females0.55
St. James’s University Hospital gradeGrade 1: 6Grade 1: 150.015
Grade 2: 4Grade 2: 0
Grade 3: 1Grade 3: 3
Grade 4: 5Grade 4: 0
Grade 5: 4Grade 5: 2
Extra-sphincteric: 2Extra-sphincteric: 3