The Demographic and Clinical Characteristics of Ulcerative Colitis in a Northeast Brazilian Population

Table 3

Poisson regression model of the factors associated with extensive colitis in ulcerative colitis patients in two reference centers in Salvador, Brazil.

Variables	Initial model		Final model
	PRadj	Coefficent	PRadj	Coefficent
(Intercept)		−1.17		−1.39
Age (years)		0.45		0.45
<30	1.56		1.58
≥30	1		1
Gender		0.29		0.28
Male	1.34		1.33
Female	1		1
Family history; of IBD		−0.33		−0.33
Yes	0.71		0.71
No	1		1
Weight loss		0.49		0.51
Yes	1.64		1.67
No	1		1
Diarrhea		0.38		0.41
Yes	1.46		1.51
No	1		1
Active smoking		−1.20		−1.17
Yes	0.29		0.30
No	1		1
Origin		−0.03		—
Rural areas	0.96		—
Urban areas	1		—
White		−0.04		—
Yes	0.95		—
No	1		—
Blood in stools		−0.07		—
Yes	0.93		—
No	1		—
EIMs		−0.01		—
Yes	0.99		—
No	1		—

Note: Akaike information criterion (AIC): 383.
Coefficent from Poisson regression model.
Adjusted prevalence ratio from the Poisson regression model.
EIMs = extraintestinal manifestations.
IBD = inflammatory bowel disease.