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Table 7 The factor structure of the twelve-item General Health Questionnaire (GHQ-12)

From: Using the GHQ-12 to screen for mental health problems among primary care patients: psychometrics and practical considerations

Model Χ2 df p Χ2/df NFI CFI RMSEA (90% CL) ECVI (90% CL)
1. Three-dimensional 249.10 51 0.000 4.88 0.821 0.849 0.076 0.485
2. One-dimensional 322.78 54 0.000 5.98 0.785 0.795 0.086 0.585
3. Two-dimensional 298.90 53 0.000 5.64 0.785 0.813 0.083 0.552
4. One-dimensional with correlated error terms 212.60 39 0.000 5.45 0.847 0.868 0.081 0.466
  1. NFI Normed Fit Index, CFI Comparative Fit Index, RMSEA Root Mean Square Error of Approximation, ECVI Expected Cross Validation Index