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Table 2: Predicted mean and SD for z-score calculations
Pediatric Adult
Mean SD Mean SD
Males 
    Anterior volume (mm³) 27.5 A + 69.7 94.4 586.1–1.19 A 94.4
    Posterior volume (mm³) 5.66 A + 30.9 21.8% 152.6–1.1 A 37
    Total volume (mm³) 33.6 A + 95.8 98 756.6–2.81 A 98
    Sagittal R2 (Hz) 0.0331 A + 10.7 0.88 Same Same
Females 
    Anterior volume (mm³) 29.3 A + 116.9 101.5 659-.816 A 101.5
    Posterior volume (mm³) 1.59 A + 60 22.5 0.96 A + 71.3 22.5
    Total volume (mm³) 32.2 A + 171.5 106.5 795–1.84 A 106.5
    Sagittal R2 (Hz) 0.0331 A + 10.7 0.88 Same Same
Volume estimates 
    Average height 0.142 A + 3.21 0.65 6.17–0.0219 A 0.65
    5/6 Area-length (ant.) 28.9 A + 54.7 91.6 586.1–0.668 A 91.6
    5/6 Area-length (total) 33.8 A + 150.1 112.6 798.1–2.24 A 112.6

Note:—A indicates age in years; ant., anterior.

	Pediatric		Adult
	Mean	SD	Mean	SD
Males
Anterior volume (mm³)	27.5 A + 69.7	94.4	586.1–1.19 A	94.4
Posterior volume (mm³)	5.66 A + 30.9	21.8%	152.6–1.1 A	37
Total volume (mm³)	33.6 A + 95.8	98	756.6–2.81 A	98
Sagittal R2 (Hz)	0.0331 A + 10.7	0.88	Same	Same
Females
Anterior volume (mm³)	29.3 A + 116.9	101.5	659-.816 A	101.5
Posterior volume (mm³)	1.59 A + 60	22.5	0.96 A + 71.3	22.5
Total volume (mm³)	32.2 A + 171.5	106.5	795–1.84 A	106.5
Sagittal R2 (Hz)	0.0331 A + 10.7	0.88	Same	Same
Volume estimates
Average height	0.142 A + 3.21	0.65	6.17–0.0219 A	0.65
5/6 Area-length (ant.)	28.9 A + 54.7	91.6	586.1–0.668 A	91.6
5/6 Area-length (total)	33.8 A + 150.1	112.6	798.1–2.24 A	112.6