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Table 3 Confirmatory factor analysis

From: Content validity and psychometric evaluation of the Functional Assessment of Chronic Illness Therapy-Fatigue scale in patients with chronic lymphocytic leukemia

FACIT-Fatigue

RMSEA (90% CI)

SRMR

CFI

ω

ωH

ECV

Single factor modeling

 Symptom subscale

0.068 (0.005–0.123)

0.014

0.998

0.903

  

 Impact subscale

0.166 (0.143–0.190)

0.061

0.961

0.907

  

 Total scale

0.152 (0.139–0.165)

0.066

0.946

0.943

  

Bifactor modeling

0.120 (0.105–0.135)

0.044

0.973

0.954

0.905

0.819

  1. Abbreviations: CI confidence interval, CFI comparative fit index, ECV explained common variance, FACIT-Fatigue Functional Assessment of Chronic Illness Therapy-Fatigue scale, RMSEA root mean square error of approximation, SRMR standardized root mean square residual, ω omega, ωH omega hierarchical
  2. Standard cutoff values: RMSEA < 0.06; SRMR < 0.08; CFI > 0.95 [17,18,19,20]