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164Chapter10positionedusingthereferenceage-specificCCFP-offsetvaluesastheheadshapeofthepost-surgeryOCVRgroupwasbeingmodelledtowardsnormalshapedheads Thepost-surgeryEACS3DphotosusedscaphocephalyCCFP-offsetvaluesinterpolatedtowardsthereferencevaluefrom6-18monthsofageAfter18monthsthereferenceCCFP-offsetvalueswereusedfortheEACS3Dphotos3DPHOTOMEASUREMENTSForall3Dphotosthecraniallengthwasmeasuredfromthemostanteriorpointtothemostposteriorpointofthecraniumandthecranialwidthwasdeterminedbyalineperpendiculartothecephaliclength15Dividingcranialwidthbycraniallengthresultedinthecephalicindex(CI)Circumferencewasmeasuredonthecranialshapesatthecrossingpointsofthecranialwidthandlength Thevolumeabove thesella turcica–nasionplane wascalculatedResults weresplitongender,typeofsurgeryandpreorpost-surgerystatusGROWTHMAPSColor-codedgrowthandshapecomparisonmapswerecreatedtovisualizetheshapechangesoftheheadandwereusedtocomparethegroupsTocounteranynon-craniosynostosisrelatedasymmetriesoftheheadthe3DphotosweremirroredandaveragedoverthemidsagittalaxispriortoanalysisThesegrowthmapsvisualizethedifferencebetweenthemeanheadshapesintwosequentialagegroupsorbetweentwotreatmentgroupsPatientsweregroupedbasedongender,ageandtreatmentFinallytoinvestigatethelong-termoutcometheresultsofbothsurgicalstrategieswerecomparedat24monthsofageSECONDARY TREATMENTASPECTSSecondarytreatmentaspectsincludedageatsurgerygender,bloodlosssurgerytimetotalanesthesiatimeblood-transfusions(periandpost-surgery)hospitalstaydurationandintensivecareunit(ICU)staydurationHelmettherapydurationwasalsoobtainedforEACSSTATISTICALANALYSISForall3Dphotomeasurementsthemeanandstandarderrorofmean(SEM)werecomputedperdatasetpergroupandamixedmodelanalysiswasperformedTwo-tailed t-tests for3Dmeasurementsbetweenagegroupsperinterventionandgenderwereconducted