| Quality of clinical studies in neurosurgical journals: signs of improvement over three decades. | |
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MedLine Citation:
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PMID: 16235674 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECT: The aim of this study was to evaluate the quality of clinical studies appearing in neurosurgical journals during three decades. METHODS: Clinical studies published in 1982, 1992, and 2002 in Neurosurgery, Journal of Neurosurgery (JNS), and British Journal of Neurosurgery (BJN) were evaluated. The feature study types were categorized as follows: Type 1, prospective randomized controlled trials (PRCTs); Type 2, other prospective studies; Type 3, retrospective case-controlled and cross-sectional studies; and Type 4, case reports. Among a total of 786 articles, the following study types were identified: Type 1, eight (1%); Type 2, 46 (6%); Type 3, 81 (10%); and Type 4, 651 (83%). Overall, the proportion of study types did not differ among journals. Between 1982 and 2002, increases in the proportion of study Types 1 (0 compared with 2%, respectively), 2 (4 compared with 10%, respectively), and 3 (5 compared with 13%, respectively) and decreases in the proportion of study Type 4 (92 compared with 75%, respectively; p < 0.001) were apparent only in JNS and Neurosurgery (p < 0.01). Between 1982 and 2002, the median number of patients (two compared with 14, respectively) and the mean number of authors per study (3.4 compared with 4.8, respectively) increased (p < 0.001). The JNS had a greater mean number of authors per study than the other journals (p < 0.001). CONCLUSIONS: During the three decades evaluated, case reports remained the predominant study design in these prominent neurosurgical journals, notwithstanding the modest increases in study Types 1 and 2 and the associated escalations in author and patient numbers in the same period. |
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Authors:
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Kanna K Gnanalingham; James Tysome; Juan Martinez-Canca; Sinan A Barazi |
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Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: Journal of neurosurgery Volume: 103 ISSN: 0022-3085 ISO Abbreviation: J. Neurosurg. Publication Date: 2005 Sep |
Date Detail:
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Created Date: 2005-10-20 Completed Date: 2005-11-01 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0253357 Medline TA: J Neurosurg Country: United States |
Other Details:
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Languages: eng Pagination: 439-43 Citation Subset: AIM; IM |
Affiliation:
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Department of Neurosurgery, Charing Cross Hospital, Fulham Palace Road, London, United Kingdom. kannagnana@doctors.org.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Case-Control Studies Clinical Trials as Topic / standards* Humans Neurosurgery / standards*, trends Publishing / standards*, trends Quality Control Research Design Retrospective Studies |
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