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

Table 5

Poisson regression model of the factors associated with the use of azathioprine in patients with UC in two reference centers in Salvador, Brazil.

Variables	Initial model		Final model
	PRadj	Coefficient	PRadj	Coefficient
(Intercept)		−3.34		−3.92
Age (years)		0.54		0.55
<30	1.72		1.73
≥30	1		1
Origin		−0.69		−0.66
Rural areas	0.50		0.51
Urban areas	1		1
Family history; of IBD		0.24		0.23
Yes	1.27		1.26
No	1		1
White		−0.58		−0.56
Yes	0.55		0.56
No	1		1
Active smoking		−0.26		−0.28
Yes	0.76		0.75
No	1		1
Blood in stool		−0.32		−0.33
Yes	0.72		0.71
No	1		1
Weight loss		0.37		0.37
Yes	1.45		1.45
No	1		1
EIM		0.24		0.22
Yes	1.27		1.25
No	1		1
Extensive colitis		0.33		0.34
Yes	1.40		1.41
No	1		1
Need for; hospitalization		0.53		0.56
Yes	1.71		1.75
No	1		1
Use of; corticosteroids		2.09		2.07
Yes	8.10		7.96
No	1		1
Gender		0.12		—
Male	1.13		—
Female	1		—
Diarrhea		—		—
Yes	1.37		—
No	1		—

Note: Akaike information criterion (AIC): 221.6.
Gross prevalence ratio.
Coefficient from the Poisson regression model.
Adjusted prevalence ratio from the Poisson regression model.
EIM = extraintestinal manifestations.
IBD = inflammatory bowel disease.