Influencing Factors of Salt-reduction Behavior among Residents: a Mixed Methods Research Based on the PRECEDE Model

Background The prevalence of hypertension among Chinese residents is high while the control rate is low. It has been suggested by numerous epidemiologic studies that reducing salt intake could reduce blood pressure level. Therefore, it is significant for health management of residents and reducing social burden to explore determinants of salt-reduction behavior among residents. Objective To explore the predisposing, reinforcing and enabling factors of salt-reduction behavior among Shandong residents based on the PRECEDE model, and provide scientific suggestions for the subsequent salt-reduction campaign. Methods This study was a mixed methods research. A total of 114 residents were interviewed in 2016 and 2018 by using purposive sampling method. The interview guide mainly contained attitudes to salt control, difficulties encountered and assistance received during salt control. The quantitative data were obtained from the database of terminal survey of Shandong and Ministry of Health Action on Salt and Hypertension (SMASH), and the sample of eastern as well as central-southern Shandong from the database was selected into this research. The part related to hypertension among this survey was selected from the database, and a total of 6 697 research objects were finally selected. Results The results of multinomial Logistic regression showed that gender, occupation and education level have an impact on the compliance of salt reduction behavior controlling for the effect of other variables (P