How different domains of quality of life are associated with latent dimensions of mental health measured by GHQ-12

Nouri, Fatemeh; Feizi, Awat; Roohafza, Hamidreza; Sadeghi, Masoumeh; Sarrafzadegan, Nizal

doi:10.1186/s12955-021-01892-9

Table 3 Rotated factor loadings of exploratory Multidimensional Graded Response (MGR) models for constructing mental health dimensions measured by Genera Health Questionnaire-12 (GHQ-12)

From: How different domains of quality of life are associated with latent dimensions of mental health measured by GHQ-12

Items		One-dimensional model	Bifactor model			Two-dimensional model		Three-dimensional model			Four-dimensional model
Items		One-dimensional model	General factor	Specific factor 1	Specific factor 2	F1	F2	F1	F2	F3	F1	F2	F3	F4
GHQ1	Been able to concentrate on whatever you are doing	0.48	0.32	0.50	0.00	− 0.13	− 0.53	0.22	− 0.61	0.30	0.08	0.19	− 0.02	0.65
GHQ2	Felt that you are playing a useful part in things	0.59	0.40	0.70	0.00	0.02	− 0.82	− 0.02	− 0.82	− 0.03	− 0.17	− 0.12	0.23	0.59
GHQ3	Enjoyed normal day-to-day activities	0.64	0.45	0.69	0.00	− 0.06	− 0.80	− 0.02	− 0.81	0.04	− 0.12	0.00	0.40	0.41
GHQ4	Been able to face up to your problems	0.60	0.39	0.77	0.00	0.06	− 0.89	− 0.02	− 0.88	− 0.07	0.03	− 0.02	0.89	0.00
GHQ5	Felt capable of making decisions about things	0.66	0.44	0.77	0.00	0.02	− 0.90	− 0.07	− 0.88	− 0.07	− 0.03	− 0.02	0.89	− 0.01
GHQ6	Felt reasonably happy, all things considered	0.65	0.46	0.71	0.00	− 0.07	− 0.81	− 0.02	− 0.82	0.05	0.03	0.11	0.80	0.04
GHQ7	Lost much sleep over worry	0.63	0.53	0.00	0.48	− 0.74	0.09	− 0.03	0.02	0.71	− 0.02	0.70	− 0.02	0.02
GHQ8	Been feeling unhappy and depressed	0.83	0.70	0.00	0.65	− 0.95	0.08	0.00	− 0.01	0.96	0.02	0.95	− 0.01	0.05
GHQ9	Felt constantly under strain	0.85	0.72	0.00	0.59	− 0.96	0.08	− 0.11	0.00	0.85	− 0.07	0.87	0.06	− 0.03
GHQ10	Felt you could not overcome your difficulties	0.89	0.86	0.00	0.28	− 0.85	− 0.10	− 0.54	− 0.04	0.41	− 0.50	0.44	0.06	0.00
GHQ11	Been losing confidence in yourself	0.88	0.93	0.00	0.04	− 0.76	− 0.19	− 0.90	− 0.01	0.04	− 0.87	0.08	0.01	− 0.01
GHQ12	Thinking of yourself as a worthless person	0.80	0.90	0.00	− 0.10	− 0.66	− 0.20	− 0.85	− 0.07	− 0.001	− 0.92	− 0.05	− 0.01	0.03

The positively phrased items were GHQ1 to GHQ6 (with a response scale including more than usual; same as usual; less than usual and much less than usual)
The negatively phrased items were GHQ7 to GHQ12 (with a response scale including not at all; no more than usual; rather more than usual and much more than usual). See Table 4 in the manuscript for information on goodness of fit indices for all five competing models

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