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From:
Published online 2005 July 22. doi: 10.1186/1478-7954-3-8

Table 4

Pearson's correlation matrix of CDC Symptom Inventory scores and MFI, Chalder Fatigue Scale, and SF-36 subscales (N = 164)

Total scoreShort-formCase definition score
QuestionnairesrPrPrP
MFI
 General fatigue.64< .001.67< .001.63< .001
 Physical fatigue.60< .001.62< .001.62< .001
 Reduced activity.60< .001.62< .001.57< .001
 Reduced motivation.53< .001.53< .001.50< .001
 Mental fatigue.54< .001.56< .001.54< .001
Chalder Fatigue Scale.74< .001.76< .001.75< .001
SF-36
 Physical functioning-.58< .001-.56< .001-.60< .001
 Role-physical-.64< .001-.56< .001-.62< .001
 Bodily pain-.67< .001-.56< .001-.68< .001
 General health-.59< .001-.59< .001-.60< .001
 Vitality-.68< .001-.69< .001-.67< .001
 Social functioning-.66< .001-.62< .001-.63< .001
 Role-emotional-.39< .001-.40< .001-.37< .001
 Mental health-.46< .001-.48< .001-. 41< .001
CDC Symptom Inventory Scores
 Total.94< .001.97< .001

Short-form.94< .001.95< .001