Skip to main content

Table 2 Standardized factor loadings from confirmatory factor analysis *

From: Validation of the Headache Impact Test (HIT-6) in patients with chronic migraine

HIT-6 item Study 1 Study 2
(n = 672) (n = 702a)
Factor loading Standard error Factor loading Standard error
Ab Pain Severe When Headache 0.652 (0.032) 0.740 (0.025)
B Limit Ability to Do Daily Acts 0.770 (0.023) 0.797 (0.020)
C Wish Could Lie Down 0.536 (0.032) 0.658 (0.028)
D Too Tired to Do Work or Daily Acts 0.785 (0.022) 0.796 (0.021)
E Feel Fed Up/Irritated Because of Headache 0.533 (0.033) 0.554 (0.031)
F Limit Ability to Concentrate 0.751 (0.027) 0.744 (0.024)
  1. aOnly includes participants with complete item level HIT-6 data.
  2. bFactor loading fixed to one for identification purposes.
  3. RMSEA = 0.086; WRMR = 1.263; CFI/TLI = 0.976/0.978.
  4. CFI = comparative fit index; RMSEA = root mean square error of approximation; TLI = Tucker-Lewis Index; WRMR = weighted root mean square residual.
  5. *Configural Invariance Model at Baseline.