Data collection
DISEASE

Data collectors: 2 local medical undergraduates in fourth grade were recruited and unified training was conducted (1 student was responsible for patient physiological index measurement, and the other student was responsible for filling the patient questionnaire). Measurement methods and precautions were explained to ensure the accuracy of data collection.Data collection location: ① questionnaire data were collected at home; ② basic disease data (anthropometric and physiological data) were measured on an empty stomach in each village clinic/township health center.How to fill in the questionnaire: the respondents should have filled in the questionnaire by themselves. To ensure the accuracy and completeness of the information, when the questionnaire was collected, it was checked on the spot for any missing or questionable items. The respondents were asked to fill in and verify the questionnaire and then take it back after verification.Collection method of disease-related physiological indicators: same as the current situation investigation part.Data collection time: a formal intervention trial was conducted from March to July 2021, and relevant data of patients at baseline (T