. Author manuscript; available in PMC: 2009 May 1.

Published in final edited form as: Am J Health Promot. 2009;23(4):229–232. doi: 10.4278/ajhp.071211129

Table 2.

Descriptive and Difference Statistics for the Daily Consumption of Dairy Products, Fruits, Vegetables, and Sugars/Sweets (in times per day) Reported on the Presurveys and Postsurveys^*

	Presurvey Mean (SD)	Postsurvey Mean (SD)	t(df)	p
Dairy products	2.84 (1.70)	3.14 (1.73)	2.87 (15)	0.001
Fruit	2.23 (1.56)	2.21 (2.12)	−0.40 (15)	0.698
Vegetables	1.15 (0.98)	1.17 (0.96)	−0.15 (15)	0.885
Sugars/sweets	4.17 (3.09)	3.44 (2.81)	7.00 (15)	<0.001

t-tests were generated from the final estimation of fixed effects in multilevel modeling. Robust adjustments were made to the standard errors for the calculation of p. Models controlled for age and grade. Unadjusted means are presented. n = 622 students (dairy), n = 617 students (fruit), n = 630 students (vegetables), and n = 601 students (sugars/sweets).

SD indicates standard deviation.