Proposal for a new classification of anorectal abscesses based on clinical characteristics and postoperative recurrence

Table 2 Variable assignment table of risk factors

Variables	Assignment
Postoperative prognosis	1: Recurrence, 0: Cured
New classification	1: Fistula-prone abscess, 0: Non-fistula-prone abscess
Time from symptom onset to surgery (days)	1: ≥ 7, 0: < 7
Diabetes mellitus	1: Yes, 0 : No
Preoperative antibiotic use	1: Yes, 0: No
Chronic diarrhea	1: Yes, 0: No
Anesthesia method of perianal abscess	1: Local, 0: Spinal
Anatomic classification	1: Perianal, 2: Intersphincteric, 3: Ischiorectal, 4: Horseshoe, 5: Supralevator
Pus culture	1: Escherichia coli, 2: Klebsiella pneumoniae, 3: Staphylococcus aureus, 4: Others, 0: No results