Table 1. Inclusion and exclusion criteria.

Inclusion criteria	Thoracic- or low-back-related diagnosis
	First prescription* of physical therapy (according to form)
	Age between 18 and 65
Exclusion criteria	Specific back pain (e.g. Bechterew disease or fracture)
	Not capable of reading, writing and/or understanding German language
	Prescription for massage or lymph drainage as primary therapy

^*“First prescription” according to German regulations means no therapy for at least 12 weeks.