TABLE I.

Characteristics of Infants with Craniosynostosis (Cases) and Infants with No Major Birth Defects (Controls), the National Birth Defects Prevention Study, 1997–2004.

Characteristics	Cases (n=670)	Controls (n=5,928)
Infant sex
Male	66.1% (443)	50.3% (2982)
Female	33.9% (227)	49.6% (2941)
Maternal education (years)
Less than 12	11.2%(75)	16.6% (986)
12	23.7%(159)	24.7%(1464)
More than 12	63.6%(426)	57.2% (3389)
Maternal race or ethnicity
Non-Hispanic white	74.2%(497)	59.5% (3524)
Non-Hispanic African American	4.6% (31)	11.4%(674)
Hispanic	16.0%(107)	22.3% (1323)
Asian or Pacific Islander	1.8% (12)	3.0% (175)
Native American/Alaskan native	0.5% (3)	0.5% (27)
Other	2.8% (19)	3.1% (183)