Abstract
Background
The main objective of this study was to assess painful memory as well as long‐term episodic memory, both in patients with chronic pain (CP) and in asymptomatic participants (AP).
Methods
A prospective cohort study design was used. Sixty‐eight participants were divided into two groups: CP (n = 34) and AP (n = 34). The protocol consisted of taking eight tests, four painful provocation tests and four distracting tests, and completing a memory test on the order of the tests at the end of the experiment and at 1‐month post‐experiment.
Results
Patients with CP showed acceptable concordance in the classification, in ascending order from lower to higher pain perception, both post‐experiment and 1‐month post‐experiment (κ = 0.41–0.60, p <.001). No differences were found regarding recall of the order of the tests, but differences were found in painful tests isolated only post‐experiment in the CP group with a moderate effect size (p < .05, d = 0.77).
Conclusions
Patients with CP had a more reliable memory than AP in relation to the memory of the pain caused experimentally until at least one month after the experiment. Interspersing distraction tests appeared to result in increased complexity and difficulty in coding and decoding information in patients with CP, leading to similar reliable long‐term memory consolidation in comparison with AP.
from Wiley: European Journal of Pain: Table of Contents https://ift.tt/2Yux09j
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