Table III.

Global volume differences between PWS subjects and controls

Tissue	Mean volume, ×103 mm3 (SD)		P‐value
	PWS	Controls
GM	656 (89)	727 (63)	0.040*
WM	395 (55)	466 (59)	0.005*
CSF	274 (61)	291 (64)	0.728
Total (GM + WM + CSF)	1,326 (156)	1,484 (167)	0.046*

^* P < 0.05.

PWS, Prader‐Willi syndrome; GM, gray matter; WM, white matter; CSF, cerebrospinal fluid.