Little Zoe, Newman Simon, Dodds Alex, Spicer Dominic
Northwick Park Hospital, London, United Kingdom.
Chelsea and Westminster Hospital, London, United Kingdom.
J Orthop Surg (Hong Kong). 2015 Dec;23(3):375-8. doi: 10.1177/230949901502300325.
To compare the level of evidence of orthopaedic studies published in 2002 and 2012 to determine whether the quality and quantity of studies have increased.
The top 10 orthopaedic journals in 2002 and 2012 were identified, according to the Thomson Reuters impact factor. The level of evidence of each clinical article between January and June in 2002 and 2012 were determined by 2 senior orthopaedic trainees, according to the Oxford Centre for Evidence-based Medicine 2011 Levels of Evidence. Basic science articles, case reports, and non-systematic reviews were excluded. The proportions of papers designated to each level of evidence in 2002 and 2012 were compared, as was the mean level of evidence of studies in 2002 and 2012.
In 2002, 379 clinical articles were identified and their level of evidence was level 1 (n=3), level 2 (n=67), level 3 (n=71), and level 4 (n=238). In 2012, 642 clinical articles were identified and their level of evidence was level 1 (n=26), level 2 (n=113), level 3 (n=167), and level 4 (n=336). The proportion of level 4 articles decreased from 62.8% in 2002 to 52.3% in 2012 (p=0.001), whereas the proportion of level 1 articles increased from 0.8% to 4.1% (p=0.002) and level 3 articles increased from 18.7% to 26.0% (p=0.008). The mean level of evidence improved from 3.44 in 2002 to 3.27 in 2012 (p=0.002).
The quality and quantity of orthopaedic studies have increased from 2002 to 2012, but most studies remained of a low level of evidence.
比较2002年和2012年发表的骨科研究的证据水平，以确定研究的质量和数量是否有所提高。
根据汤森路透影响因子确定2002年和2012年排名前十的骨科期刊。由2名资深骨科实习医生根据牛津循证医学中心2011年证据水平，确定2002年和2012年1月至6月期间每篇临床文章的证据水平。排除基础科学文章、病例报告和非系统评价。比较了2002年和2012年指定为每个证据水平的论文比例，以及2002年和2012年研究的平均证据水平。
2002年，共识别出379篇临床文章，其证据水平为1级（n = 3）、2级（n = 67）、3级（n = 71）和4级（n = 238）。2012年，共识别出642篇临床文章，其证据水平为1级（n = 26）、2级（n = 113）、3级（n = 167）和4级（n = 336）。4级文章的比例从2002年的62.8%降至2012年的52.3%（p = 0.001），而1级文章的比例从0.8%增至4.1%（p = 0.002），3级文章的比例从18.7%增至26.0%（p = 0.008）。平均证据水平从2002年的3.44提高到2012年的3.27（p = 0.002）。
从2002年到2012年，骨科研究的质量和数量有所提高，但大多数研究的证据水平仍然较低。
