Guest guest Posted January 11, 2008 Report Share Posted January 11, 2008 Infants with a cephalic ratio of >91.2% were identified as the brachycephaly group. 91.2% was chosen, because it is 2 standard deviations above the mean using the Dekaban scale, and is approximately 1 standard deviation above the mean based on the Graham paper. The brachycephaly group with the cephalic ratio of >91.2 was further stratified into two groups. The Symmetrical Deformational Brachycephaly (SDB) Group (N=15 or 6.7%) was composed of infants having an Overall Symmetry Ratio >95% and < 6 mm of difference in the diagonals. The Asymmetrical Deformational Brachycephaly (ADB) Group (N=93 or 41.3%) was composed of infants having an Overall Symmetry Ratio of < 95% and >6mm of difference in the diagonals. 117 of the 225 infants (52%) had deformational plagiocephaly, characterized by a cephalic index < 91.2 and >6mm diagonal difference. Data source: http://www.oandp.org/publications/jop/2007/2007-34.asp This is different from what I saw from one of the previous post.( See below)Any advise or comments as to how to determine the benchmarks?? Brachycephaly Severity is measured by the Cephalic Ratio = Cranial Breadth > (ML)/Cranial Length (AP). In your case that would be 5 / 6 1/8 = 81% > > ideal ratio - 78% > > normal - 73-83% > > moderate - 83.1% to 87.9% > > severe - 88% and higher Quote Link to comment Share on other sites More sharing options...
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