Summary of Literature - Power Analyses

Attachment 40 Summary of the Literature Informing Power Analyses

Table 1. Summary of Current Research Informing PYFP Evaluation Power Analyses

Author	Outcomes	Population	Design	ICC	Notes
Robbins et al., 2013	Minutes of MVPA	Middle school girls	Cluster Randomized Trial (CRT); two levels (school, student), with randomization at level 2 (school)	.02 assumed; no ICC reported	—
Vizcaino et al., 2008	BMI	School children; average age, 9	CRT; 2 levels (school, kid), with randomization at level 2 (school)	.009 assumed; no ICC reported	—
Lubans et al., 2010	BMI	Eighth-grade girls	CRT; 2 levels(school, kid), with randomization at level 2 (school)	.01 assumed; reported ICC = .03	Also reported ICC obtained for MVPA (.09)
Laris, Russell, & Potter, 2007	Skills, minutes of PA, strength, and VO2 max	Fourth- and fifth-grade students	Quasi-experiment; 2 levels, with pretest, posttest, and delayed posttest	.006 assumed for minutes of PA and .011 assumed for VO2 max; no ICCs reported	—
Kriemler et al., 2010	Body fat, aerobic fitness, and PA	First- and fifth-grade students	CRT; three levels (school, class, student), with randomization at level 2 (class)	.10 assumed; .06 for reported body fat, .03 for aerobic fitness, .15 for PA, and .08 for MVPA	These ICCs are for class level. The researchers assessed school level and found it to be negligible.