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Table 3 Fit statistics for the alternative models (Estimator: Mean- and Variance-adjusted Weighted Least Square)

From: Psychometric properties of the stagnation scale in medication overuse headache patients

  Chi-Square (χ 2 ) Relative chi-square (χ 2 /df) Root mean square error of approximation (RMSEA) (90%CI) Comparative Fit Index (CFI) WRMR (Weighted root mean square residual) Degree of freedom (df)
Three-factor model 238.70* 2.36 0.07 (0.06/0.08) 0.98 0.75 101
Bi-factor model 161.43* 1.83 0.05 (0.04/0.07) 0.99 0.56 88
  1. *Significant for p < 0.001.