Annals of General Psychiatry

Table 6 Correlation coefficients of the 11 FQ items versus the 9 PHQ-9 items correlations with the FQ and PHQ-9 sum scores (N = 2,037)

From: Norwegian reference data on the Fatigue Questionnaire and the Patient Health Questionnaire-9 and their interrelationship

	FQ1	FQ2	FQ3	FQ4	FQ5	FQ6	FQ8	FQ9	FQ10	FQ11	FQ
PHQ1	0.42	0.40	0.37	0.44	0.49	0.25	0.35	0.13	0.24	0.30	0.48
PHQ2	0.38	0.38	0.34	0.37	0.46	0.21	0.32	0.09	0.19	0.30	0.43
PHQ3	0.33	0.34	0.30	0.30	0.38	0.27	0.24	0.09	0.19	0.20	0.40
PHQ4	0.52	0.54	0.52	0.45	0.61	0.33	0.34	0.09	0.21	0.30	0.59
PHQ5	0.30	0.35	0.30	0.33	0.38	0.23	0.27	0.10	0.17	0.24	0.38
PHQ6	0.33	0.32	0.32	0.34	0.20	0.42	0.25	0.11	0.20	0.28	0.40
PHQ7	0.27	0.31	0.29	0.29	0.34	0.20	0.40	0.14	0.28	0.37	0.37
PHQ8	0.22	0.23	0.22	0.25	0.25	0.15	0.20	0.14	0.15	0.20	0.30
PHQ-9	0.21	0.23	0.22	0.25	0.25	0.15	0.20	0.14	0.15	0.20	0.27
PHQ	0.50	0.52	0.48	0.51	0.61	0.35	0.46	0.19	0.30	0.37	0.59

Bold numbers showing correlations with Spearman’s coefficients r ≥ 0.50

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ISSN: 1744-859X

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