Mental turmoil, suicide risk, illness perception, and temperament, and their impact on quality of life in chronic daily headache

Table 2 Bivariate correlations among variables

		HAM-D	QL-Index	BHS	TEMPS			SSS			IPQ
		HAM-D	QL-Index	BHS	Hypertimic	Irritability	Dys-Cyc-Anx	Part 1	Part 2	Total score	Symptoms	Timeline acute/chronic	Timeline cyclical/episodic	Consequences	Personal control	Treatment control	Illness coherence	Emotional representation
	QL-Index	−0.61^†
	BHS	0.49^†	−0.34^†
TEMPS	Hypertimic	−0.27*	0.18	−0.47^†
	Irritability	0.29*	−0.19	0.58^†	−0.19
	Dys-Cyc-Anx	0.48^†	−0.27*	0.70^†	−0.46^†	0.55^†
SSS	Part 1	0.28*	−0.47^†	0.54^†	−0.24*	0.41^†	0.35^†
	Part 2	0.37^†	−0.32^†	0.44^†	−0.27^†	0.34^†	0.27^†	0.72^†
	Total score	0.35^†	−0.41^†	0.52^†	−0.27^†	0.39^†	0.32^†	0.90^†	0.94^†
IPQ	Symptoms	0.27*	−0.29*	0.30^†	−0.18	0.14	0.40^†	0.35^†	0.28^†	0.33^†
	Timeline acute/chronic	−0.13	−0.14	0.35^†	−0.14	0.21*	0.21*	0.23*	0.10	0.17	0.26*
	Timeline cyclical/episodic	0.24	−0.16	0.20	0.01	0.18	0.16	0.17	0.25*	0.24*	0.20	0.12
	Consequences	0.15	−0.23	0.34^†	−0.28^†	0.15	0.28^†	0.29^†	0.27^†	0.30^†	0.35^†	0.46^†	0.12
	Personal control	0.08	−0.20	−0.01	0.27^†	0.03	0.02	0.04	0.04	0.04	−0.04	−0.08	0.17	0.10
	Treatment control	−0.17	0.09	−0.02	0.16	0.01	−0.02	−0.09	−0.03	−0.05	0.07	0.13	0.21*	0.01	0.29^†
	Illness coherence	−0.01	−0.07	0.11	0.10	−0.02	0.12	−0.02	−0.14	−0.09	−0.10	0.19	−0.01	0.15	0.11	0.24*
	Emotional representation	0.29*	−0.34^†	0.41^†	−0.20	0.28^†	0.43^†	0.34^†	0.24*	0.30^†	0.32^†	0.35^†	0.15	0.59^†	0.08	0.03	0.25*

^†Correlation is significant at the 0.01 level (two-tailed); * correlation is significant at the 0.05 level (two-tailed)

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