Table 1

Patient Subgroups

Unmedicated (Total n = 531)


Category

Total

Mean Age (SD)


Control Females

197

46.5 (18.6)

Control Males

193

44.3 (18.2)

Chronic Fatigue Syndrome Females

38

42.2 (10.6)

Chronic Fatigue Syndrome Males

9

38.6 (11.4)

Depressed Females

10

45.8 (17.6)

Depressed Males

7

47.2 (11.0)

Fatigued Females

60

41.8 (9.3)

Fatigued Males

17

39.7 (8.6)


Medicated (Total n = 101)


Category

Total

Mean Age (SD)


Chronic Fatigue Syndrome Females

18

43.3 (13.6)

Chronic Fatigue Syndrome Males

5

32.3 (12.4)

Depressed Females

4

37.5 (24.3)

Depressed Males

3

33.9 (5.4)

Fatigued Females

63

41.6 (11.6)

Fatigued Males

8

32.3 (16.2)


Subject Cohort: numbers per group, mean ages (SD = standard deviation).

Controls = Unmedicated, normal control subjects, healthy by physician evaluation,

CFS = Patients meeting CDC criteria for chronic fatigue syndrome, otherwise healthy

Fatigue = Referred patients with non-specific fatigue, CFS status unknown, otherwise healthy

Depression = Physician referred DSM-IV criteria for depression, otherwise healthy.

Duffy et al. BMC Neurology 2011 11:82   doi:10.1186/1471-2377-11-82

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