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Systematic review reveals heterogeneity in definition of a clinically relevant difference in pain.

Abstract：

OBJECTIVE:To describe the pain decrease considered as clinically relevant when designing a trial and reporting its results. METHODS:A systematic review of the literature in MEDLINE was conducted to select randomized controlled trials (RCTs) with pain as a primary outcome. Data extracted included the definition (terms and values) of a clinically relevant difference in pain, the type of pain studied (acute or chronic), the level of application (group or individual) of the clinically relevant difference, and the reference justifying the choice of value for clinically relevant difference. STUDY DESIGN AND SETTING:Seventy-four trials were included, and only 16 articles justified the choice of a value for clinically relevant difference with a reference citation. The values chosen for the clinically relevant relative decrease in pain varied from 4 to 40 mm or from 15% to 55% at the group level and from 20 to 50 mm at the individual level. In seven articles, the authors confused the application of the reference value at the individual or group level. CONCLUSION:Our review revealed a great heterogeneity in definition, format, and values of what is considered a clinically relevant difference in pain in RCTs of analgesics, and standardizations are advisable.

journal_name

J Clin Epidemiol

journal_title

Journal of clinical epidemiology

authors

Ruyssen-Witrand A,Tubach F,Ravaud P

doi

10.1016/j.jclinepi.2010.06.008

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

463-70

issue

5

eissn

0895-4356

issn

1878-5921

pii

S0895-4356(10)00259-3

journal_volume

64

pub_type

杂志文章,评审

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