TABLE 4.

Magnetic resonance imaging findings for Chiari malformation type 1 children with and without sleep-disordered breathing (SDB)

Finding	SDB		P
	Yes (n=33)	No (n=35)
Tonsillar descent below foramen magnum, mm, mean ± SD	13.5±6.2	12.4±5.1	0.40
Cerebrospinal fluid effacement	13	20	0.16
Syrinx	14	11	0.45
Hydrocephalus	5	0	0.02
Velopharyngeal shunt	2	2	1

Data presented as n unless otherwise indicated