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Table 3 Confirmatory factor analysis results: estimations by generalized least squares (GLS)*

From: Confirmatory factor analytical study of the WHOQOL-Bref: experience with Sudanese general population and psychiatric samples

Structural fit indices Using 6F & 5F models from 623 general population subjects Applying WHO 4- & 6-domain models
  General popn subjects Psychiatric patients Family caregivers Gen popn subjects Psychiatric pts Family caregivers
  6F model 5F model 6F model 5F model 6F model 5F model 4d model 6d model 4d model 6d model 4d model 6d model
No of parameters 57 56 58 57 57 57 52 54 51 53 52 54
Discrepancy (X2) 936.6 925.8 638.4 623.4 688.0 717.4 859.3 947.6 548.9 556.4 611.9 664.4
DF 295 297 299 297 298 300 250 249 252 253 251 250
Discrepancy/DF 3.18 3.12 2.14 2.09 2.31 2.39 3.44 3.81 2.18 2.19 2.44 2.66
GFI 0.88 0.89 0.84 0.84 0.82 0.82 0.89 0.87 0.85 0.84 0.83 0.81
Adjusted GFI 0.86 0.86 0.81 0.81 0.79 0.78 0.86 0.85 0.82 0.82 0.79 0.78
AIC 1050.6 1037.8 754.4 737.4 802.0 831.4 963.3 1053 650.9 662.4 715.9 772.4
RMSEA 0.059 0.058 0.062 0.061 0.066 0.068 0.063 0.067 0.063 0.063 0.069 0.075
  1. NOTES: DF = degrees of freedom; 6F mod = 6-factor model; 5F mod = 5-factor model; 4d mod = 4-domain model; 6d mod = 6-domain model; GFI = goodness of fit index; FI = fit index; RMSEA = root mean square error; AIC = Akaike index; Gen popn = general population
  2. * Ideal fit indices are: Discrepancy/Df < 5; GFI, AGFI ≥ 0.9; RMSEA = 0.05 – 0.08; lower AIC