Table 2.

Meta-analysis of diet and supplements with risk of dementia.

							Heterogeneity
Dementia/AD	Diet and supplements vitamin E	Studies ( n )	OR	95% CI	P -value	Model	I2 (%)	P -value
	Vitamin E	15	0.79	0.70–0.88	0.012	Random	35.0	0.071
	Dietary Vitamin E	8	0.78	0.65–0.95	0.004	Random	59.2	0.016
	Vitamin E supplements	9	0.83	0.73–0.94	0.000	Random	30.6	0.173
Dementia	Cohort study	14	0.79	0.69–0.89	0.000	Random	48.3	0.022
	Case-control study	4	0.76	0.47–1.24	0.274	Random	0.0	0.799
	>7	8	0.85	0.75–0.97	0.017	Random	0.0	0.445
	< =7	10	0.76	0.65–0.89	0.000	Random	49.4	0.038
	Vitamin E	9	0.78	0.64–0.94	0.001	Random	36.9	0.123
	Dietary Vitamin E	5	0.83	0.64–1.09	0.182	Random	60.2	0.040
AD	Vitamin E supplements	3	0.67	0.47–0.96	0.031	Random	0.0	0.460
	Cohort study	8	0.77	0.63–0.94	0.010	Random	42.3	0.097
	>7	3	0.63	0.36–1.15	0.136	Random	37.7	0.201
	< =7	6	0.80	0.65–0.98	0.035	Random	44.1	0.111