Table 4.

Regression Analysis Comparing Student Health and Behavior Responses in Four- versus Five-Day Schedules

	Without school fixed effects		With school fixed effects
	Coefficient±SE	p-value	Coefficient±SE	p-value
Nutritional Behaviors (past 7 days)
Frequency of fruits/day	−0.045±0.025	.075	−0.057±0.066	.386
Frequency of vegetables/day	0.006±0.036	.875	−0.042±0.091	.643
Frequency of sugar sweetened beverages/day	0.235±0.113	.039	0.092±0.045	.041
Frequency of soda/day	0.063±0.029	.028	−0.014±0.062	.826
Frequency of milk/day	0.086±0.026	.001	−0.025±0.041	.542
Frequency of water/day	−0.039±0.032	.227	−0.139±0.052	.008
Days eating breakfast	−0.019±0.019	.333	0.002±0.057	.970
Food insecure (% yes, past 12 months)	−0.011±0.012	.366	0.085±0.006	< .001
Physical Activity Behaviors
Physical education days (avg school week)	−0.391±0.145	.008	−0.882±0.202	< .001
Days physically active ≥60 mins (past 7 days)	0.115±0.065	.075	−0.228±0.255	.372
Screen time hours/day (avg school day)	−0.187±0.061	.002	−0.185±0.203	.364
Overweight/Obese (%), self-report	0.030±0.010	.002	0.012±0.026	.663
Substance Use (past 30 days)
Any drug use	−0.013±0.013	.316	0.107±0.036	.003
Any marijuana use	−0.019±0.010	.048	0.065±0.025	.010
Any alcohol use	−0.002±0.013	.873	0.028±0.039	.475
Any cigarette use	0.018±0.010	.059	−0.004±0.023	.873
Took prescription drug without a prescription	0.000±0.005	.959	0.017±0.011	.123
Drove after drinking alcohol	−0.010±0.005	.071	−0.010±0.017	.575
Sexual Health
Had sexual intercourse (past 3 months)	0.020±0.013	.130	−0.052±0.046	.265
Ever been victim of forced sex	0.006±0.006	.253	0.017±0.014	.239
Violence
Been in a physical fight (past 12 months)	0.004±0.007	.557	−0.001±0.022	.965