[Study on change of behavioral stages on nutritional intervention in farmers]

To explore the applying stages of change model on nutrition intervention on "eating more vegetables and fruits, eating less salt" in farmers, and evaluate the change of behavioral stages.

The questionnaires were used to do baseline and evaluation survey on 500 farmers in trial group and control group respectively. Applying stages of change model to divide farmers into five stages according to their behavior of eating more vegetables and fruits. The intervention ways were used in trial group, especially in five stages farmers. After one year,the changes of behavioral stages in two groups were evaluated.

There were statistical significance on proportion of behavioral stages between before intervention and after intervention in trial group (P < 0.05): the upgrade of behavior stages has been gained, the proportion of preparation, action, maintenance increased by 15.1%, 20.7% and 16.1% for eating more vegetables and fruits. With the rise of behavioral stage, the awareness rates of healthy knowledge, the average daily intake of vegetables and fruits, folic acid and urine potassium levels have rised, and the average daily intake of salts, diastolic pressure, homocysteine and urine sodium levels have reduced increasingly (P < 0.05).

After intervention, through applying SOC model to analyse and show that the proportion of behavioral stages about eating more vegetables and fruits on farmers have changed from precontemplation to action and maintenance, the upgrade of behavior stages has been gained; The higher stages farmers have higher levels of heathy knowledge, more positive healthy belief and attitude, lower risk factors of chronic diseases than the lower stages farmers, the stages of change model has the practicability on behavior change.