Table 3. ANOVA Analysis of Demographic and Clinical Parameters and the Apnea Hypopnea Index.

Source of Variation	Partial SS	df	MS	F	P Value
Model	24 721	6	4120	5.6	<.001
Age	543	1	543	0.74	.39
Male	2082	1	2082	2.8	.09
Weight status	4743	2	2371	3.2	.04
Tonsil hypertrophy	18 004	1	18 004	24	<.001
African American	1257	1	1257	1.7	.19
Error	159 758	217	736

Abbreviations: df, degrees of freedom; F, test statistic for F distribution; MS, mean square; partial SS, sum of squares.