Objective:To know the diet behaviors of middle school students in Chongqing and to analyze its influencing factors

so as to provide scientific basis for diet instruction.Methods:A questionnaire survey on nutritional knowledge

attitude and behavior was finished by 2 358 students using stratified and cluster sampling;the effect factors of diet behaviors were analyzed with Logistic regression.Results:86.64% students had bad habits in diet behavior.There was a significant difference in the diet behaviors of male and female at 16 years old.The results of logistic regression showed that living in school or not

nutritional knowledge

current diet behaviors affecting health when grown up or not

willingness to change the bad diet behaviors

learning time

and outdoor activity time were the influencing factors of diet behaviors

whose OR values were 1.775

1.259

1.718

1.966

0.744 and 1.209

respectively.Conclusion:The diet behaviors of middle school students in Chongqing were poor.The influencing factors of the diet behaviors of middle school students in Chongqing include living in school or not

nutritional knowledge

current diet behaviors affecting health when grown up or not

willingness to change the bad diet behaviors or not

learning time and outdoor activity time.