. Author manuscript; available in PMC: 2015 Feb 20.

Published in final edited form as: Stat Med. 2013 Sep 13;33(4):662–674. doi: 10.1002/sim.5967

Table I.

Descriptive statistics for body mass index z-scores (BMIz)*, number of fast food restaurants and convenience stores at three distances and their pairwise correlations.

Distance	Variable	Mean	SD	Corr.	BMIz*	FFR₁	FFR₂	FFR₃	CS₁	CS₂	CS₃
	BMIz*	0.744	0.374	BMIz*	1	0.04	0.09	0.13	0.13	0.20	0.25
1/4 mile	FFR₁	0.233	0.679	FFR₁		1	0.55	0.36	0.25	0.23	0.21
1/2 mile	FFR₂	1.150	1.758	FFR₂			1	0.73	0.19	0.38	0.37
3/4 mile	FFR₃	2.709	2.915	FFR₃				1	0.15	0.37	0.50
1/4 mile	CS₁	0.178	0.473	CS₁					1	0.53	0.39
1/2 mile	CS₂	0.774	1.083	CS₂						1	0.76
3/4 mile	CS₃	1.697	1.845	CS₃							1

BMIz* is the mean of child’s BMIz within schools.