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Table 3 Correlations among PROMIS fatigue 7a, 8a, 4a, Rand Vitality and 10-point fatigue scores

From: PROMIS Fatigue short forms are reliable and valid in adults with rheumatoid arthritis

 

Fatigue 8a

Fatigue 4a

Rand36

Fatigue NRS

7d Fatigue

Fatigue 7a

r

0.94

0.91

0.86

0.85

0.86

N

548

546

388

347

546

Fatigue 8a

r

 

0.98

0.87

0.88

0.93

N

549

388

351

546

Fatigue 4a

r

 

0.86

0.88

0.96

N

387

348

544

Rand-36 Vitality

r

 

0.81

0.82

N

344

387

Fatigue NRS

(0–10)

r

 

0.87

N

345