Table 3.

Adjusted Mean Scores for School Food and Physical Activity Environment Indices by Year and Summary Statistics for Linear Trends.

Indices	Adjusted means - All schools						Linear trend
Food Environment	2010	2011	2012	2013	2014	2015	All schools	Primary	Secondary	Difference
NSLPa – Healthy	6.50	6.77	6.84	7.40	7.29	7.33	0.18***	0.19***	0.15*	NS
NSLPa – Unhealthy	3.47	3.35	3.29	3.31	3.19	3.13	−0.06*	−0.05	−0.09^	NS
A La Carte – Healthy	2.56	3.05	3.13	3.27	3.30	3.33	0.15*	0.07	0.30**	^
A La Carte – Unhealthy	2.19	2.68	2.58	2.56	2.72	2.71	0.09^	-0.04	0.33***	**
Vending Machine – Healthy	0.46	0.53	0.49	0.79	0.77	0.87	0.08***	0.10***	0.04	NS
Vending Machine – Unhealthy	0.82	0.84	0.74	1.24	1.11	0.70	0.01	0.12**	−0.19**	***
Presence of Vending Machines	0.60	0.63	0.62	0.88	0.88	0.90	0.07**	0.12***	−0.03	***
Physical Activity (PA) Environment
Indoor Facilities	1.97	1.95	2.00	2.00	1.94	1.97	0.00	-0.01	0.01	NS
Outdoor Facilities	2.81	2.67	2.67	2.78	2.80	2.89	0.02	0.05	0.04	NS
PA Opportunities	3.24	3.37	3.43	3.22	3.44	3.48	0.04	0.08^	−0.05	^
Additional Indices
School-level health promotion initiatives	4.57	4.75	4.60	4.38	4.50	4.52	−0.03	−0.01	−0.07	NS
Federal- and state-level health promotion programs	1.66	1.56	1.51	1.37	1.24	1.17	−0.10**	−0.15***	−0.00	*
Total number of observations (N)	127	127	127	110	110	110	711	480	231

^{^}p<0.10

^*p<0.05

^**p<0.01

^***p<0.001

^aNSLP: National School Lunch Program