Table 4. Factors contributing to oral health symptoms by multiple logistic regression analysis (n=950).

Independent variable			Dependent variable: Participants with at least three oral health symptoms
		n	n	(%)	OR (95% CI)	p-value
Age
	25–34	94	23	(24.5)	1
	35–44	238	46	(19.3)	0.76 (0.42–1.39)	0.370
	45–54	391	87	(22.3)	0.98 (0.54–1.77)	0.936
	55–64	227	55	(24.2)	1.18 (0.62–2.24)	0.613
Annual personal income
	2–6 million yen	176	51	(29.0)	1
	6–10	353	86	(24.4)	0.71 (0.46–1.09)	0.115
	10 and over	339	61	(18.0)	0.47 (0.29–0.74)	0.001
	unknown	82	13	(15.9)
Total stress score
	7–15	140	17	(12.1)	1
	16–19	357	79	(22.1)	2.23 (1.25–3.99)	0.007
	20–23	328	80	(24.4)	2.73 (1.51–4.91)	0.001
	24–28	125	35	(28.0)	3.25 (1.66–6.35)	0.001
Current smoker
	No	660	137	(20.8)	1
	Yes	290	74	(25.5)	1.28 (0.91–1.79)	0.153
Diabetes
	No	892	192	(21.5)	1
	Yes	58	19	(32.8)	1.40 (0.75–2.59)	0.289
Hypertension
	No	741	163	(22.0)	1
	Yes	209	48	(23.0)	0.86 (0.57–1.28)	0.458
BMI 25 or over
	No	655	125	(19.1)	1
	Yes	295	86	(29.2)	1.70 (1.21–2.38)	0.002
Experience of tooth loss
	No	519	106	(20.4)	1
	Yes	431	105	(24.4)	1.09 (0.78–1.54)	0.615
Presence of decayed teeth (one or more)
	No	759	159	(20.9)	1
	Yes	191	52	(27.2)	1.27 (0.87–1.86)	0.220