Table 3 Characteristics that will be extracted from included studies

Identification features of the report

Authors

Title

Year

Source (e.g. journal article, conference abstract)

Population

Sample size

Age

Gender

Height, weight, body mass index

Randomisation details and arm group characteristics (crossover design only)

Intervention

Experimental pain model/s adopted

Intervention characteristics (e.g. type, dosage, method)

Body region stimulated (anatomical structure and location, unilateral or bilateral stimulation)

Average and highest level of pain experienced (VAS or NRS)

Duration of pain symptoms

Qualitative description of pain (e.g. McGill Pain Questionnaire)

Perceived location and distribution of pain symptoms (including referred pain)

Co-interventions

Potential confounders to the intervention effect (NRSI only)

Deviations from intended intervention

Time window between interventions

Comparator

No intervention (baseline condition) or control intervention

Typology of control intervention

Level of pain induced with the control intervention (minimal versus not at all)

Duration of pain symptoms (if experienced)

Co-interventions

Assessment of the POST-PAIN condition

Time window between PAIN and POST-PAIN condition

Outcomes

Outcome domain

Outcome measure

Measurement tool

Body region/muscle investigated (including all spinal regions and limbs)

Task

Design

Randomised trial (crossover) or NRSI (repeated measure)

Time point assessments, including their order and time in between (e.g. wash-out period)