Trial Characteristics and Appropriateness of Statistical Methods Applied for Design and Analysis of Randomized School-Based Studies Addressing Weight-Related Issues: A Literature Review

Table 3

Power analysis and statistical methods by study years: N (%).

Power analysis statistical methods	All years ()	1995–2012 ()	2013–2017 ()	value
Power analysis conducted and reported	52 (43.0%)	24 (38.1%)	28 (48.3%)	0.258
ICC taken into account for power analysis	26 (21.5%)	13 (20.6%)	13 (22.4%)	0.828
Multilevel analysis performed	83 (68.6%)	40 (63.5%)	43 (74.1%)	0.176
ICC estimated from the analysis reported	10 (8.3%)	7 (11.1%)	3 (5.2%)	0.327