TABLE 1.

Differences in age, CFQ score, and several brain region volumes (divided and standardized by intracranial volume) between work type groups.

	Desk workers		Non-desk workers
Measures	N = 942		N = 676		t-test (P-value)
	Mean	(SD)	Mean	(SD)
Age	52.668	(4.607)	52.973	(4.546)	0.933
CFQ	25.787	(5.806)	25.635	(5.777)	0.730
Total BV/ICV	0.8250	(0.0175)	0.8259	(0.0167)	0.090
Total GMV/ICV	0.4275	(0.0182)	0.4277	(0.0181)	0.975
Total WMV/ICV	0.3975	(0.0177)	0.3981	(0.0174)	0.737

CFQ, the Chalder’s fatigue questionnaire; BV, brain volume; GMV, gray matter volume; WMV, white matter volume; ICV, intra-cranial volume; SD, standard deviation.