Table 2 Correlation coefficients of stress indicators for the FMS sample N = 99.

Variable	Perceived Stress	Salivary Cortisol	Hair Cortisol	Age	BMI	Symptom Burden	Bodily Distress	Spatial Extent of Pain	Tender Points	Pain Severity	Pain Inter-ference	Pain Duration
Perceived Stress
Salivary Cortisol	0.13
Hair Cortisol	0.17	0.06
Age	− 0.06	− 0.25	0.01
BMI	− 0.03	− 0.14	0.07	0.10
Symptom Burden	0.41**	− 0.08	0.03	0.03	0.14
Bodily Distress	0.56**	− 0.06	0.03	− 0.04	0.02	0.46**
Spatial Extent of Pain	0.03	− 0.13	− 0.11	0.17	0.13	0.29	0.10
Tender Points	− 0.02	− 0.18	− 0.09	0.32	0.29	0.44**	0.13	0.43**
Pain Severity	0.39**	− 0.19	− 0.06	0.13	0.19	0.48**	0.41**	0.06	0.28
Pain Interference	0.55**	− 0.10	0.01	0.00	0.17	0.48**	0.61**	0.11	0.17	0.72**
Pain Duration	0.05	− 0.13	0.04	0.39**	0.09	− 0.03	− 0.07	0.07	0.11	− 0.05	0.00
Fibromyalgianess	0.25	− 0.12	− 0.08	0.10	0.02	0.50**	0.18	0.82**	0.44**	0.22	0.23	0.09

Note. *p < .05, ** p < .001. Perceived Stress = Perceived Stress Scale (PSS), BMI = Body Mass Index, Symptom Burden = Somatic Symptom Scale (SSS-8), Bodily Distress = Somatic symptom Disorder (SSD12), Spatial Extent of Pain = Widespread Pain Index (WPI), Fibromyalgianess = Polysymptomatic Distress Scale (PSD).

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