Table 2. Associations between socioeconomic factors and unorganised prostate-specific antigen (PSA) testing in Region Västra Götaland, Sweden, among men aged 50–52 years 6–7 years before the start of the organised testing programme.

Variable	Total number of men	PSA tested men (%)	Univariable Poisson regression		Multivariable Poisson regression
			Incidence rate ratio (95% CI)	P value	Incidence rate ratio (95% CI)	P value
Education level
Primary	5263	13.7	0.97 (0.90 to 1.05)	0.404	1.00 (0.92 to 1.08)	0.934
Secondary	16 855	14.1	1		1
Tertiary	10 600	14.6	1.03 (0.97 to 1.09)	0.314	1.00 (0.95 to 1.06)	0.917
Country of birth
Nordic	23 374	14.4	1		1
Non-Nordic	4945	13.2	0.92 (0.86 to 0.99)	0.023	0.98 (0.91 to 1.06)	0.614
Household
More than one person	17 043	15.1	1		1
Single person	11 269	12.7	0.84 (0.79 to 0.89)	<0.001	0.87 (0.82 to 0.92)	<0.001
Adjusted gross income
<50% of median	7269	11.8	0.79 (0.74 to 0.85)	<0.001	0.83 (0.78 to 0.90)	<0.001
≥50% of median	21 043	14.9	1		1