. 2019 Apr 25;19:61. doi: 10.1186/s12903-019-0750-4

Table 4.

Factors related to the incidence of dementia according to the number of teeth lost

Variables	Odds Ratio Estimates			p-value
Variables	Point Estimate	95% Wald Confidence Limits		p-value
The number of teeth lost
1–6 (standard = 0)	1.158	1.124	1.194	<.0001^a
7–12 (standard = 0)	1.272	1.210	1.338	<.0001^a
≥13 (standard = 0)	1.313	1.179	1.461	<.0001^a
Female (standard = male)	1.330	1.290	1.371	<.0001^a
Age
70–79 (standard = 60–69)	1.879	1.824	1.936	<.0001^a
≥80 (standard = 60–69)	2.379	2.216	2.553	<.0001^a
Urban resident (standard = rural resident)	1.329	1.293	1.366	<.0001^a
Eligibility
Family member (standard = head of household)	1.005	0.975	1.035	0.7450
Medical aid beneficiaries (standard = head of household)	1.499	1.416	1.588	<.0001^a
Income level
Second quintile (standard = first quintile)	0.979	0.930	1.032	0.4328
Third quintile (standard = first quintile)	0.947	0.900	0.996	0.0353^a
Fourth quintile (standard = first quintile)	0.939	0.896	0.984	0.0084^a
Fifth quintile (standard = first quintile)	0.952	0.911	0.995	0.0290^a
History of periodontal treatment (standard = no history)	0.961	0.931	0.991	0.0113^a
History of dental caries (standard = no history)	1.064	1.032	1.097	<.0001^a

^aStatistically significant at a 95% confidence interval