Utilization of dental care among patients with severe mental illness: a study of a National Health Insurance database

Table 3 Predictors of dental care utilization among patients with severe mental illness

Variable	Unadjusted odds ratio		Adjusted odds ratio	P value
Variable	Estimate (95 % CI)	P value	Estimate (95 % CI)	P value
Gender
Female	1		1
Male	0.89 (0.84–0.94)	<0.001	0.96 (0.91–1.02)	0.207
Age group
18–34	1		1
35–49	0.81 (0.74–0.89)	<0.001	0.75 (0.68–0.82)	<0.001
50–64	0.86 (0.78–0.94)	0.001	0.67 (0.61–0.74)	<0.001
65+	0.49 (0.45–0.54)	<0.001	0.36 (0.33–0.40)	<0.001
Socioeconomic status
Low	1		1
Middle	0.97 (0.91–1.04)	0.378	0.93 (0.87–1.00)	0.053
High	1.69 (1.54–1.85)	<0.001	1.34 (1.21–1.48)	<0.001
Dentist/population ratio^a
Low	1		1
Middle	1.29 (1.20–1.39)	<0.001	1.27 (1.18–1.38)	<0.001
High	1.62 (1.50–1.75)	<0.001	1.60 (1.48–1.73)	<0.001
Hospitalization bed days
Less than 30 days	1		1
30 days or more	0.75 (0.68–0.83)	<0.001	0.82 (0.73–0.91)	<0.001
Low income
No	1		1
Yes	0.85 (0.75–0.95)	0.006	0.73 (0.64–0.83)	<0.001
Health care utilization^b
Low	1		1
Middle	2.08 (1.93–2.24)	<0.001	2.41 (2.23–2.61)	<0.001
High	2.82 (2.59–3.07)	<0.001	3.83 (3.50–4.19)	<0.001

^aLow: less than 3.43, middle: 3.43–6.5, high: 6.51 or more (per 10,000 residents)
^bumbers of outpatient visits in the year 2009; low: less than 18, middle: 19–48, high: 49 or more

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