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Table 5 Confirmatory Factor Analysis of the GHQ - 12

From: A Rasch and confirmatory factor analysis of the General Health Questionnaire (GHQ) - 12

  12 item 12 item* Model1 Model2 GHQ-6 GHQ-8
χ 2 1608.7 565.55 1018.5 874.71 202.98 265.51
Df 54 39 53 51 9 19
P 0.0001 0.0001 0.0001 0.0001 0.001 0.0001
RMSEA (90% CI) 0.10 (0.097 - 0.11) 0.069 (0.064 - 0.075) 0.081 (0.076 - 0.085) 0.076 (0.072 - 0.08) 0.086 (0.076 - 0.096) 0.068 (0.061 - 0.075)
ECVI (90% CI) 0.60 (0.55 - 0.65) 0.24 (0.21 - 0.27) 0.39 (0.35 - 0.43) 0.34 (0.31 - 0.38) 0.081 (0.067 - 0.099) 0.11 (0.095-0.13)
IFI 0.89 0.96 0.93 0.89 0.97 0.97
CFI 0.89 0.96 0.93 0.94 0.97 0.97
  1. * Correlated error term (Hankins, 2008)
  2. Model 1 Andrich & van Schoubroeck (1989) Two-factor model
  3. Model 2 Graetz (1991) Three-factor model