Table 1.

Distribution of explanatory variables

	AGE CATEGORY (col%)
	15–34 years			35–44 years			55–74 years			75+ years			All ages
	n(a)	%(b)	SE#	n(a)	%(b)	SE#	n(a)	%(b)	SE#	n(a)	%(b)	SE#	n(a)	%(b)	SE#
Site of last visit(p ≤ 0.0001)
Private	1479	80.8	1.2	2959	90.4	0.7	2086	87.6	0.9	487	90.5	1.4	7011	86.5	0.6
Public	166	9.0	0.9	197	5.9	0.6	234	8.9	0.7	54	8.2	1.3	651	7.7	0.5
School	71	4.2	0.6		0.0	0.0	1	0.0	0.0		0.0	0.0	72	1.4	0.2
Technician	1	0.0	0.0	12	0.4	0.1	15	0.7	0.2	1	0.2	0.2	29	0.3	0.1
Other	97	6.0	0.8	108	3.4	0.4	58	2.8	0.4	5	1.1	0.5	268	4.0	0.3
Sex(ns, p = 0.230)
Male	674	47.8	1.5	1203	47.2	1.1	953	49.1	1.2	216	42.6	2.3	3046	47.6	0.8
Female	1147	52.2	1.5	2073	52.8	1.1	1442	50.9	1.2	331	57.4	2.3	4993	52.4	0.8
Last visit(p ≤ 0.0001)
Check-up	1132	65.1	1.4	1721	53.5	1.1	1204	50.6	1.4	319	58.4	2.5	4376	57.0	0.8
Problem	689	34.9	1.4	1554	46.5	1.1	1191	49.4	1.4	227	41.6	2.5	3661	43.0	0.8
Income(p ≤ 0.0001)
<$20 K	103	5.6	0.7	251	6.4	0.5	574	22.1	1.1	254	46.5	2.8	1182	12.1	0.5
$20–<40 K	274	17.3	1.3	514	15.0	0.8	699	30.2	1.1	149	33.4	2.5	1636	20.3	0.6
$40–<60 K	335	20.5	1.4	657	20.4	0.9	369	17.0	0.9	50	11.9	1.9	1411	19.2	0.6
$60–<80 K	281	20.1	1.4	593	19.2	0.9	209	10.6	0.8	21	4.8	1.3	1104	16.6	0.6
$80+K	499	36.6	1.7	1107	39.0	1.3	346	20.1	1.3	14	3.4	1.3	1966	31.9	0.9
ALL (row%)	1821	33.8	0.8	3276	38.1	0.7	2395	22.4	0.7	547	5.7	0.3	8039	100.0	0.0

(a) unweighted

(b) weighted

# Standard errors corrected for complex sample design