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Table 2 Clinical characteristics of ulcerative colitis (n = 654)

From: The prevalence and phenotype in Brazilian patients with inflammatory bowel disease

Phenotypic elements Extension
E1 E2 E3 p
Proctitis Left-sided colitis Pancolitis
n % n % n %
Age at diagnosis (A)a A1: ≤ 16 3 13.0 6 26.1 14 60.9 0.007
A2: 17–40 89 28.4 116 37.1 108 34.5  
A3: > 40 106 30.5 125 39.3 87 26.8  
Gender Female 126 31.5 153 38.2 121 30.2 0.469
Male 72 28.3 94 37.0 88 32.0  
  1. aAge at diagnosis is not a phenotypic element of the Montreal classification for ulcerative colitis