TABLE 2.

Group Differences in Behavior and Mental and Motor Development

	Group			Unadjusted		Adjusted
	Nonsnorers	Transient Snorers	Persistent Snorers	P	Group Differences	P	Group Differences
BASC-2
Overall BSI	49.2 ± 7.7	50.9 ± 9.9	57.6 ± 8.8	<.001	PS > NS, TS	<.001	PS > NS, TS
Hyperactivity	49.7 ± 8.1	51.2 ± 9.3	58.5 ± 11.6	<.001	PS > NS, TS	<.001	PS > NS, TS
Aggression	47.5 ± 9.1	48.9 ± 11.1	53.2 ± 9.9	<.05	PS > NS	.09
Depression	49.5 ± 9.2	51.5 ± 10.6	58.6 ± 10.7	<.001	PS > NS, TS	.001	PS > NS, TS
Attention	51.0 ± 7.2	50.6 ± 9.1	56.9 ± 8.1	<.01	PS > NS, TS	.01	PS > NS, TS
BSID
Mental	96.4 ± 12.8	89.7 ± 13.7	87.2 ± 13.9	<.001	NS > TS, PS	.67
Motor	97.7 ± 14.7	95.1 ± 16.1	97.6 ± 10.7	.53		.69

Group values presented as unadjusted mean ± SD. BASC-2 scales are based on a normative mean = 50, standard deviation = 10, with higher scores indicating worse functioning. BSID scales are based on a normative mean = 100, standard deviation = 15, with higher scores indicating better functioning. Statistical significance (P values) and group differences are based on analysis of variance with Tukey HSD follow-up for unadjusted analyses, and analysis of covariance with Tukey HSD follow-up for analyses adjusted for child gender, race, and socioeconomic status. BASC-2, Behavior Assessment System for Children, second edition; BSID, Bayley Scales of Infant Development; BSI, Behavioral Symptoms Index; NS, nonsnorers; TS, transient snorers; PS, persistent snorers; HSD, honestly significant difference.