A, The standardized rate of stroke prevalence in the 7 major geographic regions. B, The standardized rate of stroke incidence in the 7 major geographic regions. C, The standardized rate of stroke mortality in the 7 major geographic regions. Geographical regions of China included North China (Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia), Northeast China (Liaoning, Jilin, Heilongjiang), East China (Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Shandong), South China (Guangdong, Guangxi, Hainan), Central China (Henan, Hubei, Hunan), Southwest China (Chongqing, Sichuan, Guizhou, Yunnan, Tibet), Northwest China (Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang). The small maps show the South China Sea Islands.