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. 2023 Mar 2;6(3):e231455. doi: 10.1001/jamanetworkopen.2023.1455

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Copyright 2023 Tu WJ et al. JAMA Network Open.

This is an open access article distributed under the terms of the CC-BY License.

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Figure 3. — ^aReference No.

All models adjusted for age. Obesity was defined as body mass index (calculated as weight in kilograms divided by height in meters squared) greater than or equal to 28.0. Hyperhomocysteinemia was defined as serum homocysteine concentration greater than or equal to 15.0μmol/l. Please refer to the supplementary materials for the division of economic level of cities. Seven 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).