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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