Table 2.

Internal consistency reliability of FACIT-Fatigue in patients with PsA

	Cronbach’s Coefficient α	Corrected item-to-total correlations, range
PD1: OPAL Beyond baseline data pooled with OPAL Broaden Month 12
FACIT-Fatigue total score (N = 760)	0.95	0.46–0.89
FACIT-Fatigue Experience domain (N = 763)	0.93	0.59–0.89
FACIT-Fatigue Impact domain (N = 762)	0.91	0.44–0.85
PD2: OPAL Broaden baseline data pooled with OPAL Beyond Month 6
FACIT-Fatigue total score (N = 766)	0.94	0.44–0.89
FACIT-Fatigue Experience domain (N = 768)	0.91	0.53–0.86
FACIT-Fatigue Impact domain (N = 768)	0.90	0.42–0.83

FACIT-Fatigue Functional Assessment of Chronic Illness Therapy–Fatigue, PD1/2 Pooled Data 1/2, PsA psoriatic arthritis