Table 1.

Characteristics of subjects.

Variable	Self-rated health				P-value‡
	Excellent/Very good/Good		Fair/Poor
	n	%	n	%
Sex
Male	1938	34.3	344	31.6	0.093
Female	3714	65.7	743	68.4
Age
40–49	173	3.1	52	4.8	0.001*
50–59	680	12.1	160	14.8
60–69	2405	42.9	421	39.0
70–79	2348	41.9	446	41.3
BMI
18.5–25	3957	70.9	705	65.5	< 0.001*
< 18.5	323	5.8	115	10.7
25–30	1161	20.8	219	20.4
> 30	142	2.5	37	3.4
Tooth number and self-rated mastication
≥ 20 and bite tightly on both side	3857	68.2	670	61.6	< 0.001*
≥ 20 and bite tightly on one side	450	8.0	114	10.5
≥ 20 and bite tightly on neither side	89	1.6	29	2.7
< 20 and bite tightly on both side	900	15.9	164	15.1
< 20 and bite tightly on one side	227	4.0	64	5.9
< 20 and bite tightly on neither side	129	2.3	46	4.2
Marital status
Never married	223	4.0	61	5.7	0.002*
Married	4666	83.3	848	78.9
Divorced	187	3.3	48	4.5
Separation	24	0.4	11	1.0
Bereavement	485	8.7	102	9.5
Other	18	0.3	5	0.5
Educational status
University graduate or above	584	10.4	102	9.6	0.439
High school/Junior College/Professional training college/Drop out of University	4479	80.1	853	79.9
Junior high school graduate	530	9.5	112	10.5
Frequency of drinking habit
Never (including quit drinking)	2497	44.2	549	50.5	0.002*
Rarely	285	5.0	56	5.2
1 or 2 or 3 times a month	504	8.9	102	9.4
1 or 2 times a week	504	8.9	80	7.4
3 or 4 times a week	432	7.6	71	6.5
5 or 6 times a week	415	7.3	57	5.2
Every day	1015	18.0	172	15.8
Current smoker
No	5083	93.0	987	93.4	0.741
Yes	382	7.0	70	6.6
Exercise routine
Every day	1408	26.3	206	20.2	< 0.001*
3 or 4 times a week	1263	23.6	217	21.3
1 or 2 times a week	985	18.4	204	20.0
1 or 2 or 3 times a month	696	13.0	152	14.9
Less than 1 time a month	999	18.7	239	23.5
Feeling of depression
Never	3710	67.9	372	35.5	< 0.001*
Occasionally	1556	28.5	482	45.9
Often	156	2.9	137	13.1
Always	45	0.8	58	2.2
Sleeping hours
7	2184	38.8	342	31.5	< 0.001*
5	316	5.6	128	11.8
6	2135	37.9	446	41.1
8	857	15.2	131	12.1
9	131	2.3	32	3.0
≥ 10	10	0.2	5	0.5
Local community participation
More than one time a week	559	10.1	85	8.0	< 0.001*
Less than one time a week	360	6.5	65	6.1
Sometimes	2407	43.3	368	34.6
Never or hardly ever	2233	40.2	546	51.3
History of cancer
No	5048	89.3	917	84.4	< 0.001*
Yes	604	10.7	170	15.6
History of cardiovascular disease
No	3751	66.4	687	63.2	0.047*
Yes	1901	33.6	400	36.8
History of other disease
No	2243	39.7	354	32.6	< 0.001*
Yes	3409	60.3	733	67.4

BMI body mass index.

^‡p-value based on the chi-squared test.

*Statistically significant (p < 0.05).