Abstract:
BACKGROUND AND PURPOSE:The reproducibility of results and potential confounders in sample-based studies is important to consider in the assessment of studies. Comprehensive arthroplasty registers could serve as a reference dataset for comparative analyses. We analyzed an implant that is frequently used worldwide, the Oxford unicompartmental knee replacement, in order to identify potential confounders inherent in the datasets and to evaluate the outcome achieved with this implant. METHODS:We performed a structured literature review of the data published on the revision rate of the Oxford medial unicompartmental arthroplasty. Both clinical follow-up studies and worldwide registry data were included. Confidence intervals were calculated to determine the statistical significance of differences. RESULTS:A substantial proportion of the published data (52-68% depending on the method of calculation) is derived from studies involving participation of the institution that developed the implant. The results published by this group show a statistically significant deviation from the reference datasets from registers or independent studies. Data from the developing hospital show mean revision rates that are 4 times lower than those based on worldwide register data, and 3 times lower than the ones quoted in independent studies. On average, the data published in independent studies are reproducible in registry data. INTERPRETATION:A conventional meta-analysis of clinical studies is substantially affected by the influence of the developing hospital, and is therefore subject to bias. For assessment of the outcome of implants, registry data are superior and, in terms of reference data for the detection of potential bias factors in the literature, could make an essential contribution to meta-analyses.
journal_name
Acta Orthopjournal_title
Acta orthopaedicaauthors
Labek G,Sekyra K,Pawelka W,Janda W,Stöckl Bdoi
10.3109/17453674.2011.566134subject
Has Abstractpub_date
2011-04-01 00:00:00pages
131-5issue
2eissn
1745-3674issn
1745-3682journal_volume
82pub_type
杂志文章,评审abstract:BACKGROUND AND PURPOSE:Hip fracture (HF) in frail elderly patients is associated with poor physical recovery and death. There is often postoperative blood loss and the hemoglobin (Hb) threshold for red blood cell (RBC) transfusions in these patients is unknown. We investigated whether RBC transfusion strategies were as...
journal_title:Acta orthopaedica
pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,多中心研究
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pub_type: 杂志文章
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更新日期:2008-10-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章
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更新日期:2011-04-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2013-12-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章
doi:10.3109/17453674.2014.1001970
更新日期:2015-06-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,多中心研究
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pub_type: 杂志文章
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