Table 4. Discriminant analysis using FM and other craniometric measurements to discriminate between genders.

FMSD
D=−16.826+0.496 × FMSD
Wilks' Lambda=0.802, p<0.001
Percentage of accurately predicted group membership	Female	Male	Overall
	64.4%	74.4%	69.3%
Functions at group centroids	Female	Male	Classified as male if D>
	−0.48	0.503	0.012
FMTD
D=−11.912+0.42 × FMTD
Wilks' Lambda=0.83, p<0.001
Percentage of accurately predicted group membership	Female	Male	Overall
	66.7%	69.8%	68.2%
Functions at group centroids	Female	Male	Classified as male if D>
	−0.437	0.457	0.01
FMC
D=−15.109+0.158 × FMC
Wilks' Lambda=0.781, p<0.001
Percentage of accurately predicted group membership	Female	Male	Overall
	62.2%	72.1%	67%
Functions at group centroids	Female	Male	Classified as male if D>
	−0.512	0.536	0.012
FMA
D=−7.478+0.01 × FMA
Wilks' Lambda=0.799, p<0.001
Percentage of accurately predicted group membership	Female	Male	Overall
	62.2%	76.7%	69.3%
Functions at group centroids	Female	Male	Classified as male if D>
	−0.484	0.507	0.012

D, discriminant score; FM, foramen magnum; FMA, FM area; FMC, FM circumference; FMSD, FM sagittal diameter; FMTD, FM transverse diameter.