. Author manuscript; available in PMC: 2021 Dec 1.

Published in final edited form as: J Sch Health. 2021 Oct 6;91(12):1055–1063. doi: 10.1111/josh.13095

Table 2.

Demographics of Student Respondents in Four- versus Five-Day School Schedules (2007–2015)

	Four-Day (N=4,700)	Five-Day (N=99,408)	p-value

Age, years (mean±SD)	15.3±1.6	15.0±1.6	< .001
Grade (%)
8^th	48.3±50.0	56.0±49.6	< .001
11^th	51.7±50.0	44.0±49.6	< .001
Sex (% female)	49.0±50.0	50.5±50.0	.049
Race/Ethnicity (%)
Non-Hispanic White	78.9±40.8	71.2±45.3	< .001
Non-Hispanic Black	0.8±9.0	2.4±15.3	< .001
Hispanic	5.5±22.8	10.9±31.1	< .001
Other/Multi-racial	19.0±39.2	23.3±42.3	< .001
Sexual Orientation (%)
Heterosexual	92.5±26.4	90.7±29.0	< .001
LGB	7.5±26.4	9.3±29.0	< .001
Free/reduced lunch eligibility (%)	40.0±49.0	38.5±48.7	.155