Table 3. Crude odds ratio between loss of mastication in the absence of natural tooth contacts (exposure) and cognitive condition (outcome).

	All or some natural tooth contact (A,B,C) vs. No natural tooth contact (D,E,F)		All natural tooth contact (A) vs. All denture tooth contact (F)
Age group	Early elderly	Advanced elderly	Early elderly	Advanced elderly
Odds ratio	1.89	1.33	2.38	1.38
95% CI	1.8294 to 1.9541	1.3227 to 1.3437	2.2475 to 2.5099	1.3604 to 1.3946
Significance	P < 0.0001	P < 0.0001	P < 0.0001	P < 0.0001