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On bias

L Ryd¹, L Dahlberg

¹Department of Orthopedics, University Hospital, Lund, Sweden.

Acta Orthopaedica Scandinavica

|October 1, 1994

Summary

This summary is machine-generated.

This study assessed orthopedic journal quality using study design. While retrospective studies dominate, well-designed clinical trials, including randomized controlled trials, show a significant increase in recent years.

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Area of Science:

Orthopedic research quality assessment.
Medical journal study design evaluation.

Background:

Assessing the methodological quality of orthopedic clinical journals is crucial for evidence-based practice.
Previous evaluations of orthopedic literature quality have been limited.

Purpose of the Study:

To evaluate the quality of clinical journals in orthopedics based on study design.
To identify trends in the use of high-quality study designs in orthopedic research.

Main Methods:

Conducted a Medline search of 25,538 articles from 1966-1993 in top orthopedic journals.
Classified studies into three quality levels: prospective, random allocation/double-blind, and randomized controlled trials (RCTs).
Performed a manual check on 208 articles to validate Medline indexing accuracy.

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Main Results:

Out of 25,538 articles, 994 were prospective studies and 138 were RCTs.
The number and percentage of well-designed articles have increased in recent years.
Manual checks showed good, though not perfect, agreement with Medline indexing.

Conclusions:

Retrospective studies form the majority of published orthopedic clinical articles.
There has been a notable increase in the number of controlled trials in recent years.
Continued improvement in study design quality is evident in orthopedic research.