Table 1.

Intervention Group Pre- to Postsurvey Changes, and Postsurvey Intervention Versus Control Group Comparison in Nutrition Knowledge

	Items	Intervention Group		Control Group	Intervention Group Pre- to Postsurvey Changes B	Group Differences at Postsurvey B
		Pre % Correct	Post % Correct	Post % Correct
Fruits food group	Grapes	83.3	88.8	88.1	0.29	0.07
	Banana	73.2	84.9	80.2	0.56**	0.08
	Melon	84.1	91.6	92.1	0.53**	−0.50
	Cheese	85.3	93.4	89.1	0.72**	0.50
	Carrots	66.7	80.0	77.2	0.72**	0.05
Vegetables food group	Carrots	73.1	87.2	63.4	0.81**	1.42**
	Corn	68.5	84.4	67.3	0.84**	0.94**
	Peas	79.2	88.1	75.3	0.47*	0.70
	Orange	61.4	85.0	61.4	1.41**	1.20**
	French fries	76.3	89.0	71.3	0.97**	1.00*
Dairy food group	Cheese	61.6	93.5	61.4	2.03**	2.23**
	Yogurt	78.5	96.0	83.2	1.76**	0.82*
	Doughnut	56.3	82.8	54.5	1.36**	1.59**
	Beans	80.2	93.4	85.2	1.39**	0.77
	Tortilla	81.2	90.9	91.9	0.88**	−0.11
Proteins food group	Peanut butter	60.5	84.2	40.6	1.19**	2.11**
	Ham	76.8	87.4	78.2	0.65**	0.53*
	Beans	73.1	83.2	77.2	0.35*	0.73**
	Broccoli	71.2	89.8	69.3	1.13**	1.72**
	Chips	66.4	89.3	68.3	1.43**	1.31**
Grains food group	Cereal	85.8	94.2	86.1	0.71**	1.12*
	Pasta	37.7	58.3	27.7	0.87**	0.84**
	Tortilla	30.9	65.0	31.7	1.31**	1.30**
	Cookies	38.0	58.8	30.7	0.91**	0.87**
	Yogurt	68.7	93.0	80.2	1.55**	1.58**
Breakfast knowledge	Cereal versus doughnut	82.5	95.4	88.9	1.37**	1.00**
	Days/week	70.1	84.7	76.0	0.90**	0.37
Healthy snack knowledge	Yogurt versus chips	75.9	89.8	88.9	0.94**	0.02
	Cheese versus French fries	64.3	87.8	61.2	1.35**	1.81**

^*p < .05;

^**p < .01.

Percentages represent the proportion of students answering each item correctly. Analyses testing postsurvey differences of intervention and control groups controlled for sex, percent of students receiving free or reduced-priced lunches, and percent of students who were Hispanic. Means for percentage correct were calculated using matched-cases: intervention group N = 414; control group N = 103.