Table 1

Baseline characteristics of respondents and reduction of remaining teeth at follow-up (n=51280)

	Reduction of remaining teeth (N, %)
	No		Yes		Total
Sex
Man	21 652	91	2272	9	23 924
Woman	25 448	93	1908	7	27 356
Age (years)
65–69	16 367	93	1187	7	17 554
70–74	14 899	92	1281	8	16 180
75–79	10 748	91	1089	9	11 837
80–84	2798	89	346	11	3144
85+	1111	88	152	12	1263
Education (years)
<6	541	88	77	12	618
6–9	19 210	91	1923	9	21 133
10–12	16 832	93	1299	7	18 131
≥13	8957	93	702	7	9659
Annual household income
<$10 000	4727	90	504	10	5231
$10 000–$19 999	13 758	92	1208	8	14 966
$20 000–$29 999	10 198	92	832	8	11 030
$30 000–$39 999	6472	93	502	7	6974
≥$40 000	4768	93	364	7	5132
Living area
Urban area	12 844	93	897	7	13 741
Suburban area	22 231	92	1987	8	24 218
Rural area	12 025	90	1296	10	13 321
Hobby activity
Less than once per week	23 139	91	2207	9	25 346
Once or more per week	16 695	93	1232	7	17 927
Sports group
Less than once per week	28 213	92	2596	8	30 809
Once or more per week	10 384	93	756	7	11 140
Volunteer group
Less than once per week	32 222	92	2797	8	35 019
Once or more per week	4688	92	388	8	5076
Community trust
No	12 544	92	1098	8	13 642
Yes	32 310	92	2879	8	35 189
Community reciprocity
No	19 386	92	1657	8	21 043
Yes	25 252	92	2294	8	27 546
Community attachment
No	7947	92	709	8	8656
Yes	37 904	92	3356	8	41 260
Receive emotional support
No	2305	90	268	10	2573
Yes	42 452	92	3677	8	46 129
Provide emotional support
No	2516	90	295	10	2811
Yes	42 015	92	3622	8	45 637
Receive instrumental support
No	2127	92	176	8	2303
Yes	42 834	92	3788	8	46 622
Number of teeth in 2010
≥20	19 902	92	1825	8	21 727
10–19	13 775	90	1508	10	15 283
1–9	13 423	94	847	6	14 270
Smoking
Non-smoking	26 527	93	2045	7	28 572
Non-smoking now, quit before 5 years	10 309	92	941	8	11 250
Non-smoking now, quit within 4 years	2096	90	240	10	2336
Smoking	4304	89	551	11	4855
Do you have hospital treatment?
Yes	32 255	92	2771	8	35 026
No	11 154	91	1052	9	12 206