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 |