Table 1. Study cohort characteristics (n = 3069).

Variable	Category	n	%
Sex	M	1435	46.8
	F	1634	53.2
Age at cohort entry	0–9	583	19.0
	10–19	224	7.3
	20–29	195	6.4
	30–39	240	7.8
	40–49	363	11.8
	50–59	452	14.7
	60–69	515	16.8
	70–79	343	11.2
	80+	154	5.0