Study protocol: Transition from localized low back pain to chronic widespread pain in general practice: Identification of risk factors, preventive factors and key elements for treatment – A cohort study

Table 2 Overview of measurement instruments and time of assessment

			CLBP + CWP	CWP	CLBP
Function	Construct	Type	T0	T1	T1	T2	T3	T4
Function	Construct	Type	baseline	3 months	3 months	6 month	9 month	1 year
Description of sample characteristics	Socio demographic data	German Pain Questionnaire (module S)	+
	Pain anamnesis	Body pain drawing model	+	+	+	+	+	+
		German Pain Questionnaire (pain anamnesis)	+
		Multidimensional Pain Inventory (part 1, social support subscale)	+
		Multidimensional Pain Inventory (complete)						+
		Graded Chronic Pain (von Korff Index)	+
	Pain perception	Schmerzempfindungsskala (SES)		+	+
	Therapy course + medication	German Pain Questionnaire (therapy and medication items)	+			+		+
	Comorbidities	Self Administered Comorbidity Questionnaire (SACQ)	+
	Psychosomatic symptoms	Symptom Check-List-90-R (SCL-90-R, Somatisation subscale)	+
Risk factors	Screening: anxiety + depression	Hospital Anxiety and Depression Scale (HADS)	+
	Trauma Screening	Post Traumatic Diagnostic Scale (PDS-d-1) (part 1 + 2)		+				+
	Critical life events	Questionnaire for critical life events		+				+
Protective factors	Resilience	Brief Resilience scale (RS-11)	+
	Coping resources for back pain	Fragebogen zu Bewältigungsressourcen bei Rückenschmerzen (FBR)	+
	Stress Management	Brief-Cope		+				+
	Self-Efficacy	GSE (General Self-Efficacy)		+				+