Case–control or cohort study?
Case–control or cohort study?
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DOI:
10.1136/bjo.2011.203141
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发表时间:
2011-03
影响因子:
4.1
通讯作者:
Tamhane Ashutosh;G. McGwin
中科院分区:
文献类型:
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作者:
Tamhane Ashutosh;G. McGwin
In a recently published article by Chandra et al the authors have stated that they conducted a ‘case-controlled’ study to examine the anticoagulant effect of warfarin in vitreoretinal surgery.1 However, this study was conducted on a cohort of patients receiving pars plana vitrectomy (PPV); 60 patients who received warfarin (exposure) on the day of …