Table 2.

Prevalence ratio (PR) of Helicobacter pylori seropositivity according to sociodemographic characteristics

Characteristic	PRunadjusted (95% CI)	P‐value	PRadjusted a (95% CI)	P‐value
Age group in years
21‐29	1.0		1.0
30‐39	1.1 (0.6‐1.9)	.847	1.0 (0.6‐1.8)	.994
40‐49	2.0 (1.2‐3.2)	.007	1.8 (1.1‐2.9)	.028
50‐64	2.1 (1.3‐3.4)	.002	1.7 (1.1‐2.9)	.035
Marital status
Never married	1.0		1.0
Married/consensual partner	1.6 (1.0‐2.5)	.057	1.3 (0.8‐2.2)	.215
Divorced/separated/widowed	1.8 (1.1‐3.0)	.029	1.4 (0.8‐2.3)	.245
Years of education
≥12	1.0		1.0
<12	1.6 (1.2‐2.1)	.002	1.4 (1.0‐1.9)	.048
Population density of residential countyb
High	1.0
Low	1.4 (1.1‐1.8)	.014	1.3 (1.0‐1.6)	.085

^aAdjusted by all variables in the model.

^bDefined as low if adult population density is equal to or below the median (486 adults per square mile) vs high if above the median.