Table 1.

Epidemiology of schizophrenia for the Key Community Alliance from 2011 to 2015

	2011	2012	2013	2014	2015	χ2	P d
Population (million)	20.6	18.7	17.6	16.3	16.5
Schizophrenia cases	1308	1364	1433	1495	1549
aPrevalence (%)	0.63	0.73	0.81	0.92	0.94	21.91	<0.001
New schizophrenia cases	146	111	130	148	161
bIncidence (per 1000)	0.71	0.59	0.74	0.91	0.98	21.52	<0.001
Cases with aggression	402	456	496	503	623
cRate of aggression (%)	30.7	33.4	34.6	33.6	40.2	23.68	<0.001

^aPrevalence = Number of schizophrenia cases/population × 100.

^bIncidence = Number of new schizophrenia cases/population × 1000.

^cRate of aggression = Number of cases with aggression/number of schizophrenia cases × 100.

^dP: from tendency chi-square test.