Table 1.

Data collection schedule. Measurement times and variables used in the study.

Visit No.	T0	Weekly treatment								T1	T2
Week No.	0	1	2	3	4	5	6	7	8	9	24
Data provided by the patient
Pain intensity (VAS 100 mm)	X									X	X
Multidimensional pain evaluation (MPQ-SV)	X									X	X
Quality of life (SF-12)	X									X	X
Analgesics and antiinflammatory drugs prescribed	X									X	X
Sociodemographic variables	X
Credibility and expectations				X
Improvement perceived by the patient										X
Assessment of blinding effectiveness										X
Data provided by the therapist
Multidimensional pain evaluation (LT)	X	X	X	X	X	X	X	X	X	X	X
Auricular points used		X	X	X	X	X	X	X	X	X
Adverse events		X	X	X	X	X	X	X	X	X
Economic evaluation
Direct and indirect costs: healthcare professionals and patients	X									X	X

VAS 100 mm: Visual analogue scale (0–100 mm); MPQ-SV: McGill Pain Questionnaire, Spanish version; LT: Lattinen test