Format

Send to:

Choose Destination
See comment in PubMed Commons below
BMJ. 2001 Oct 13;323(7317):829-32.

Quality of Cochrane reviews: assessment of sample from 1998.

Author information

  • 1Nordic Cochrane Centre, Rigshospitalet, Dept 7112, Blegdamsvej 9, DK-2100 Copenhagen Ø, Denmark.

Abstract

OBJECTIVE:

To assess the quality of Cochrane reviews.

DESIGN:

Ten methodologists affiliated with the Cochrane Collaboration independently examined, in a semistructured way, the quality of reviews first published in 1998. Each review was assessed by two people; if one of them noted any major problems, they agreed on a common assessment. Predominant types of problem were categorised.

SETTING:

Cyberspace collaboration coordinated from the Nordic Cochrane Centre.

STUDIES:

All 53 reviews first published in issue 4 of the Cochrane Library in 1998.

MAIN OUTCOME MEASURE:

Proportion of reviews with various types of major problem.

RESULTS:

No problems or only minor ones were found in most reviews. Major problems were identified in 15 reviews (29%). The evidence did not fully support the conclusion in nine reviews (17%), the conduct or reporting was unsatisfactory in 12 reviews (23%), and stylistic problems were identified in 12 reviews (23%). The problematic conclusions all gave too favourable a picture of the experimental intervention.

CONCLUSIONS:

Cochrane reviews have previously been shown to be of higher quality and less biased on average than other systematic reviews, but improvement is always possible. The Cochrane Collaboration has taken steps to improve editorial processes and the quality of its reviews. Meanwhile, the Cochrane Library remains a key source of evidence about the effects of healthcare interventions. Its users should interpret reviews cautiously, particularly those with conclusions favouring experimental interventions and those with many typographical errors.

PMID:
11597965
[PubMed - indexed for MEDLINE]
PMCID:
PMC57800
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk