Table 4. Crude and age-standardized mortality (1/100,000) of Alzheimer 's disease and other forms of dementia in different regions, China, 2009–2015.

year	East		Central		West		χ2	P
	Mortality	age-standardized	Mortality	age-standardized	Mortality	age-standardized
2009	5.03	5.85	2.02	3.04	2.01	3.03	338.661	<0.001
2010	5.13	6.40	2.75	4.29	2.51	4.39	156.326	<0.001
2011	4.89	5.46	2.99	4.39	3.00	4.66	35.855	<0.001
2012	5.51	4.49	3.39	3.48	2.91	3.12	70.096	<0.001
2013	6.92	5.07	3.38	3.29	3.14	3.03	492.547	<0.001
2014	6.67	4.74	3.09	2.83	3.18	2.96	578.133	<0.001
2015	7.11	5.05	2.97	2.68	3.62	3.41	727.765	<0.001
tall	6.38	4.99	3.04	3.20	3.11	3.18	2253.902	<0.001
χ2	—	92.578	—	184.628	—	34.374	—	—
P	—	<0.001	—	<0.001	—	<0.001	—	—