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Table 1 Selection criteria for systematic review

From: Memory of pain in adults: a protocol for systematic review and meta-analysis

Item

Inclusion criteria

Exclusion criteria

P

- Studies on adult humans

- Patients with chronic or acute pain and pain-free healthy volunteers

- Studies including children

- Studies on animals

I

- N/A

- Clinical trials without control group (no intervention group)

C

- Original pain rating (experienced pain intensity and/or pain unpleasantness)

- N/A

O

- Pain rating after delay, i.e. representing memory of pain

- The assessment should be performed on a scale (e.g., VAS, NRS, VRS) that gives a numeric, countable outcome

- Studies in which different dimensions of experienced and recalled pain were assessed

- Studies in which experienced and recalled pain were assessed on different scales/tools

S

- N/A

- Review articles, conference communications, case studies, letters, editorials, diary studies

  1. P participants, I intervention, C comparison, O outcome, S study type, N/A not applicable, VAS visual analogue scale, NRS numeric rating scale, VRS verbal rating scale