Table 1

Multivariable linear regression of the association of mode of contraception and GDP (a measure of country's wealth) with PCa incidence

	Estimate	95% CI	p Value
Oral contraceptive use	0.65	0.3 to 1.01	0.001
Intrauterine device	−0.12	−0.4 to 1.7	0.46
Vaginal barrier	2.2	−3.6 to 8.2	0.45
Condom use	0.59	0.02 to 1.2	0.04
GDP	0.01	0.009 to 0.011	<0.001