. Author manuscript; available in PMC: 2017 Jan 1.

Published in final edited form as: Int J Drug Policy. 2015 Jun 30;27:164–172. doi: 10.1016/j.drugpo.2015.06.005

Table 4.

Sample size reduction

	Sample size (% of original sample)

Selection variable	100%	95%	90%	80%	70%	60%	50%	40%
City size large (n)	552	540	527	502	477	452	427	402
School size large (n)	552	540	528	504	480	456	433	409
Class size large (n)	552	538	523	495	466	437	409	380
School environment disadvantaged (n)	552	541	530	509	487	465	444	422
School substance use policies non-restrictive (n)	552	542	533	513	494	474	455	435