Table 1.

Overview used constructs, items, and anchors of the healthy diet determinants questionnaire.

Constructs	Questions	Anchors	Cronbach alpha
Perceived behavioral control (1-5)	Suppose you want to eat healthy...How hard is it for you to eat healthy each day?	1=very hard and 5=not hard at all	.71
	How hard is it for you to eat a healthy diet at your home?
	How hard is it for you to eat a healthy diet at your school?
Peer social norm (1-5)	How healthy does your best friend eat?	1=very unhealthy and 5=very unhealthy	N/Aa
Peer social support (1-5)	How often does your best friend encourage you to eat a healthy diet?	1=not at all and 5=very often	N/A
Attitude toward healthy eating for the good taste of healthy foods (1-5)	A reason or benefit for me to eat healthy is that I like the taste of healthy foods	1=completely disagree and 5=completely agree	N/A
Attitude toward healthy eating for overall health (1-5)	I think healthy eating is important for my overall health	1=completely disagree and 5=completely agree	.79
	A reason or benefit for me to eat healthy is that I feel better eating healthy	1=completely disagree and 5=completely agree
	A reason or benefit for me to eat healthy is that I stay in good health
Attitude toward healthy eating for appearance (1-5)	A reason or benefit for me to eat healthy is...that I lose weight	1=completely disagree and 5=completely agree	.79
	A reason or benefit for me to eat healthy is...that I can keep my weight as it is now and do not become overweight	1=completely disagree and 5=completely agree
	A reason or benefit for me to eat healthy is...that other people admire me
	A reason or benefit for me to eat healthy is...to have an attractive body

^aN/A: not applicable.