Table 1 Data collection: except for the baseline data, outcomes are assessed throughout the 6-month period

Socio-demographics (age, migration background, education)

x

Pain intensity (NRS)

x

Mean pain intensity in the last 7 days (NRS)

x

x

Mean perceived ‘LBP-/NP-related’ stress intensity in the last 7 days (NRS)

x

x

Pain acceptance

x

x

x

Sick leave days

x

x

x

Intake of medication against LBP/NP

x

x

Suspected adverse reaction^a

x

x

Serious adverse events

x

x

Application of other therapies

x

x

x

Expectation

x

Adherence^a

x^b

x^c

Self-perceived improvement

x^a

x^a