Table 1.

Comparison of demographic characteristics between the overall and the final validation samples

SUBJECT CHARACTERISTICS	OVERALL SAMPLE (n = 598)		VALIDATION SAMPLE (n = 146)
	NUMBER	%	NUMBER	%
Age group
• 50–59	348	58.2	83	56.8
• 60–74	249	41.6	63	43.2
Sex
• Male	238	39.8	56	38.4
• Female	360	60.2	90	61.6
Residence
• In Calgary	475	79.4	115	78.8
• Outside Calgary	104	17.4	30	20.5
Education
• Less than high school	65	10.9	10	6.8
• High school diploma	106	17.7	20	13.7
• Trade certificate or diploma	213	35.6	51	34.9
• University	211	35.3	65	44.5
Self-rated health
• Excellent or very good	386	64.5	99	67.8
• Good	144	24.1	36	24.7
• Fair or poor	67	11.2	11	7.5
Have a usual source of care
• Yes	477	79.8	123	84.2
• No	121	20.2	23	15.8
Go for annual physical examination
• Yes	416	69.6	114	78.1
• No	182	30.4	32	21.9