. Author manuscript; available in PMC: 2017 Jan 5.

Published in final edited form as: Sleep Health. 2016 Sep;2(3):198–204. doi: 10.1016/j.sleh.2016.04.001

Table 3.

Sample characteristics of discriminant study groups (n = 85).

	GS (n = 17)	BP (n = 20)	SOA (n = 13)	CC (n = 35)	Statistics
Age (y)	5.0 (2.0)	4.9 (1.8)	4.0 (1.6)	5.5 (2.0)	NS
Age range (y)	2–8	2–8	2–6	2–8	NS
Sex (% male)	35.5	50.0	46.2	65.7	NS
Race (% white)	100.0	60.0	61.5	80.0	χ² = 15.0, p < .05
Sleep alone (%)	94.1	70.0	00.0	60.0	χ² = 25.8, p < .001
4-Factor SES Index	51.5 (9.0)	49.2 (14.0)	45.7 (8.2)	46.7 (13.9)	NS
BASC Externalizing	43.7 (6.1)	66.7 (5.1)	51.0 (13.3)	45.1 (6.8)	F = 51.2, p < .001
BASC Internalizing	43.5 (6.2)	52.9 (4.7)	54.8 (10.7)	44.3 (9.2)	F = 10.3, p < .001

One-way analysis of variance, df(3,81); P < .05.

GS, good sleep; BP, behavior problem; SOA, sleep onset association; CC, community control; SES, socioeconomic status; NS, not significant; 4-Factor SES Index, Hollingshead²⁷; M (SD).