Table 2.

Mixed Model Regression of BMI Z-scores on Indices of School Food and Physical Activity (PA) Environment.

Indices	Elementary Schools (n = 12,722)		Secondary Schools (n = 6,466)
	Individual Domains	Full model	Individual Domains	Full model
Food Environment Domain	β (95% CI)	β (95% CI)	β (95% CI)	β (95% CI)
NSLP – Healthy	−0.03 (−0.07, +0.00)	−0.03 (−0.06, 0.01)	−0.06 (−0.11, −0.00)*	−0.03 (−0.10, 0.04)
NSLP – Unhealthy	−0.01 (−0.00, 0.03)	−0.01 (−0.05, 0.03)	−0.01 (−0.09, 0.08)	0.01 (−0.05, 0.06)
Vending  Machine – Healthy	−0.01 (−0.06, 0.03)	−0.01 (−0.05, 0.04)	0.02 (−0.08, 0.11)	−0.03 (−0.14, 0.07)
Vending Machine – Unhealthy	0.03 (−0.01, 0.08)	0.04 (−0.00, 0.08)^	0.03 (−0.07, 0.13)	0.12 (+0.00, 0.23)*
A La Carte – Healthy	0.01 (−0.00, 0.02)	0.01 (−0.01, 0.03)	0.01 (−0.02, 0.03)	−0.01 (−0.03, 0.02)
A La Carte – Unhealthy	−0.01 (−0.04, 0.03)	−0.01 (−0.04, 0.03)	0.01 (−0.03, 0.05)	0.02 (−0.02, 0.05)
Joint Significance (Wald F and p-value)	F = 9.7 p = 0.137	F = 18.4** p = 0.005	F = 43.1*** p = 0.000	F = 18.9** p = 0.004
PA Environment Domain
Indoor Facilities	0.03 (−0.03, 0.10)	0.02 (−0.04, 0.08)	−0.09 (−0.14, −0.03)**	−0.09 (−0.19, 0.01)^
Outdoor Facilities	−0.03 (−0.05, −0.01)*	−0.03 (−0.06, −0.00)*	−0.02 (−0.06, 0.01)	−0.07 (−0.13, −0.00)*
PA Opportunities	−0.03 (−0.06, 0.01)	−0.03 (−0.07, 0.01)	−0.03 (−0.07, 0.02)	+0.00 (−0.04, 0.04)
Joint Significance (Wald F and p-value)	F = 20.5*** p = 0.000	F = 23.8*** p = 0.000	F = 11.33* p = 0.010	F = 9.8* p = 0.020

Source: New Jersey Child Health Study data collected for school year 2015–2016 from public schools in Camden, Newark, New Brunswick, and Trenton, NJ.

Note: All models adjusted for student race, age, sex, free and reduced-price lunch participation, and number of students enrolled. Models labeled “Individual Domains” include all indices within the single domains. Models labeled “Full model” include all 9 indices simultaneously.

^p < 0.10, *p < 0.05, **p < 0.01, ***p < 0.001