Table 3.

Odds Ratio of class-memberships with high risky behaviors (Class II, III, IV) compared to low risky behaviors (Class I) for total sleep time, protective factor, age, gender, race, and survey year at 10^th and 12^th grades

Odds Ratio (OR) of high risky behaviors at 10th grade
	Class II OR (95% CI)	Class III OR (95% CI)	Class IV OR (95% CI)	p-value
Total Sleep Time
Short (<8h) vs. Recommended (8–9h)	1.38 (1.06, 1.80)*	1.16 (1.05, 1.27) *	1.26 (0.99, 1.61)	.0001
Long (≥10h) vs. Recommended (8–9h)	1.02 (0.32, 3.29)	1.83 (1.31, 2.57) *	2.65 (1.33, 5.28) *
Protective Factor	0.75 (0.72, 0.78) *	0.74 (0.73, 0.75) *	0.57 (0.54, 0.59) *	<.0001
Age	1.28 (1.06, 1.55) *	1.56 (1.45, 1.68) *	2.09 (1.80, 2.42) *	<.0001
Sex (Male vs. Female)	1.59 (1.30, 1.94)*	1.34 (1.24, 1.44) *	1.36 (1.14, 1.62) *	<.0001
Race (White vs. Non-white)	1.19 (0.97, 1.45)	1.19 (1.10, 1.28) *	1.33 (1.11, 1.59) *	<.0001
Survey year (2014 vs. 2012)	0.98 (0.80, 1.19)	0.89 (0.82, 0.95) *	0.74 (0.62, 0.88) *	.0003
Odds Ratio (OR) of high risky behaviors at 12th grade
	Class II OR (95% CI)	Class III OR (95% CI)	Class IV OR (95% CI)	p-value
Total Sleep Time
Short (<8h) vs. Recommended (8–9h)	0.89 (0.77, 1.04)	1.04 (0.94, 1.15)	0.90 (0.74, 1.08)	.2212
Long (≥10h) vs. Recommended (8–9h)	0.59 (0.28, 1.24)	1.05 (0.72, 1.53)	1.28 (0.72, 2.27)
Protective Factor	0.89 (0.87, 0.91) *	0.78 (0.77, 0.80) *	0.64 (0.62, 0.66) *	<.0001
Age	1.13 (0.99, 1.28)	1.34 (1.24, 1.44) *	1.22 (1.06, 1.40) *	<.0001
Sex (Male vs. Female)	0.80 (0.72, 0.89)	1.12 (1.04, 1.20) *	1.32 (1.16, 1.51) *	<.0001
Race (White vs. Non-white)	3.02 (2.69, 3.39) *	1.34 (1.25, 1.44) *	2.20 (1.93, 2.51) *	<.0001
Survey year (2014 vs. 2012)	0.98 (0.88, 1.09)	0.99 (0.92, 1.06)	1.13 (0.99, 1.28)	.2397

Note. Odds ratios and 95% confidence intervals were estimated from multinomial regression models. Class I=low risk; Class II=some risk; Class III=moderate risk; Class IV=high risk

^*indicates significant OR