Table 3. Main effects and interactions on sleep hygiene.

Model	Outcome variable	b	S.E.	R2	ΔR2
Step 1				.36b	.36b
	(Intercept)	82.17	3.16
	Age	0.12	0.17
	Gender	1.84	3.24
	SES	–0.18	0.88
	Race	–6.70a	3.38
	Sleep Attitudes	–15.00b	1.71
Step 2				.39b	.03a
	(Intercept)	80.53	3.19
	Age	0.08	0.16
	Gender	1.07	3.20
	SES	–0.63	0.91
	Race	–4.92	3.43
	Sleep Attitudes	–18.80b	3.17
	Gender X Sleep Attitudes	7.03b	3.35
	SES X Sleep Attitudes	–1.61c	0.88
	Race X Sleep Attitudes	1.88	3.52

Notes: N = 172. b = unstandardized regression weight; ΔR²= Change in R² from prior model.

^ap < .05.

^bp < .01.

^cp = .06.