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Table 3 Spearman correlations between mean FACIT-Fatigue scores, and number of SLE flares by severity and trial

From: Psychometric properties of FACIT-Fatigue in systemic lupus erythematosus: a pooled analysis of three phase 3 randomised, double-blind, parallel-group controlled studies (BLISS-SC, BLISS-52, BLISS-76)

Trial period

Flare severity

BLISS-SC

BLISS-52

BLISS-76

  

n = 763

n = 886

n = 828

Number of FACIT-Fatigue assessments

 

5341

6202

8280

Weeks 0–52

All flares

−0.09

−0.14

−0.20

Mild/moderate

−0.09

− 0.11

− 0.19

Severe

−0.02

− 0.10

− 0.06

  

n = 763

n = 818

n = 753

Number of FACIT-Fatigue assessments

 

2289

2454

3765

Weeks 24–52

All flares

−0.14

−0.16

−0.25

Mild/moderate

−0.14

−0.16

− 0.25

Severe

−0.04

−0.05

− 0.06

  1. Correlations: < 0.3, weak; ≤0.3 to < 0.6, moderate-strong; ≥0.6, strong
  2. The FACIT-Fatigue scores are patient level mean scores at two time points, mean of 0- and 52-week scores and mean of 24- and 52-week scores
  3. FACIT Functional Assessment of Chronic Illness Therapy, SLE systemic lupus erythematosus