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Table 6 Factor structure of the GHQ-28 for the BiB cohort

From: The psychometric properties of the subscales of the GHQ-28 in a multi-ethnic maternal sample: results from the Born in Bradford cohort

Model Fit statistics Factor 1 Factor 2 Factor 3 Factor 4 Factor 5 Factor 6
(1) Whole sample 38.8% variance explained χ 2 = 2601 (248) Anxiety (3.78) Depression (2.95) Social Dysfunction (1.82) General Somatics (items 1–4) (1.41) Head Somatics (items 5 & 6) (1.67) --
CFI = 0.940
RMSEA = 0.043
  SRMR = 0.022       
(2) English (White) 39.9% variance explained χ 2 = 1615 (248) Anxiety (3.41) Depression (2.91) Social Dysfunction (2.01) General Somatics (items 1–4) (1.49) Head Somatics (items 5 & 6) (1.36) --
CFI = 0.919
RMSEA = 0.051
  SRMR = 0.026       
(3) English (Pakistani) 41.1% variance explained χ 2 = 952 (248) Depression (3.32) Anxiety (3.21) Social Dysfunction (2.36) Head Somatics (items 5 & 6) (1.36) General Somatics (items 1–4) (1.28) --
CFI = 0.948
RMSEA = 0.044
  SRMR = 0.024       
(4) English (Other) 38.3% variance explained χ 2 = 571 (248) Depression (3.20) Anxiety (2.70) Social Dysfunction (2.13) Head Somatics (items 5–7) (1.35) General Somatics (items 1–4) (1.26)  
CFI = 0.941
RMSEA = 0.046
  SRMR = 0.027       
(5) Mirpuri (Pakistani & Other) 33.2% variance explained χ 2 = 352 (225) Anxiety (2.18) Social Dysfunction (2.15) Depression 1 (items 27 & 28) (1.46) General Somatics (items 1–4, 7) (1.21) Depression 2 (items 24–26) (1.21) Head Somatics (items 5 & 6) (1.08)
CFI = 0.907
RMSEA = 0.051
  SRMR = 0.038       
(6) Urdu (Pakistani & Other) 32.6% variance explained χ 2 = 440 (225) Depression (2.66) Social Dysfunction (1.79) General Somatics (items 1–4, 7) (1.41) Anxiety 1 (items 11–14) (1.30) Anxiety 2 (items 8–10) (1.03) Head Somatics (items 5 & 6) (0.94)
CFI = 0.943
RMSEA = 0.038
  SRMR = 0.027       
  1. Factors presented are most parsimonious with adequate fit statistics that do not include trivial factors, numbers in parentheses indicate post-rotation Eigenvalues which were used to calculate the explained variance, bolded fit indices indicate less than satisfactory fit.