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- A total of 4 studies met the inclusion criteria ( 1 RCT, 1 CCT and 2 prospective cohort studies). 共4个研究符合纳入标准,其中1篇为随机对照试验,1篇为临床对照试验,2篇为前瞻性队列研究。
- Study Design. Reanalysis of data deried from longitudinal cohort studies. 研究设计：对纵向群组队列数据的重新分析。
- "New studies, however, have shown substantial unadjusted selection bias in previous cohort studies. 不过，新的研究显示，在这些世代研究中有明显的选样误差。
- Background: The association between benign anal lesions and anal cancer is still unclear. Few data from large cohort studies are aailable. 背景：良性肛门损伤和肛门癌之间的联系还不清除。尚缺乏有效的大规模的群组分析数据。
- Study Design: This is a prospectie radiographic cohort study. 研究设计：该研究是一项前瞻性放射学队列研究。
- Study Design: Cohort study (prognosis); Level of evidence, 2. 研究设计：队列研究（预后）；证据等级：2级。
- Study Design. A prospectie, radiographic cohort study. 研究设计.;前瞩性的关于影像的队列研究
- Study Design: Cohort study (prevalence); Level of evidence, 2. 研究设计:队列研究(患病的);证据水平:2级.
- Methods A retrospective cohort study was used in this study. 方法采用历史前瞻性流行病学方法。
- Three RCTs and three prospective cohort studies compared surgery with non-surgical management, and 20 RCTs compared different bariatric procedures. 3个随机对照试验和3个临床对照试验中对比了手术和非手术两种治疗手段，另外的20篇纳入文章评价的是不同的外科手术。
- Finally, two separate large cohort studies evaluated maternal diet in pregnancy and suggested that vitamin D levels may be protective against asthma and wheezing. 最后，两个大样本的离体队列研究评价了母体孕期的饮食，并建议维生素D水平可以保护性的对抗哮喘和喘息。
- Results We found 1 systematic review, 3 RCTs and 8 prospective cohort studies about anticoagulation therapy and 2 SRs and 1 CCT about thrombolysis therapy. 结果 关于抗凝治疗共检索到1篇系统评价、3篇随机对照试验及8篇前瞻性队列研究；
- We performed a prospective cohort study among 184 unrelated White CH patients. 我们实施了一个包含184名无相关白种丛集性患者的前瞻性群组研究。
- Large cohort studies have clearly established the link between level of viremia and adverse outcomes, including both hepatocellular carcinoma (HCC) and cirrhosis. 大量研究证实病毒水平与副作用（肝硬化、肝细胞肝癌）明显相关。
- In total, 40 patients were enrolled in this historical prospectie cohort study. 在这项历史前瞻性队列研究中纳入40例病例。
- Cancer registries are a primary source for unbiased population-based case control studies, the end points for cohort studies and clinical trials-- and perhaps most importantly, the beginning point for survival analysis. 癌症登记处是一个无偏倚基于人群病例对照研究的原点，群组研究和临床试验的终点－也可能是最重要的生存分析的起点。
- He took a lot of flak for his stand against abortion. 他因坚持反对堕胎而饱受责难。
- The cohort studies and genetic studies yielded similar results, indicating a protectie effect from lower homocysteine leels, een though they did not share the same sources of possible error. 群组研究和遗传研究得到了相同的结论，即低同型半胱氨酸水平是一种保护性因素，尽管可能误差不同。
- The investigative team enrolled 56 patients with liver cirrhosis in a prospective cohort study. 试验小组纳取了56名患有英硬化的患者进行了列队性研究.
- A search of EMBASE and MEDLINE identified cohort studies in which women who went on to have type 2 diabetes after gestational diabetes were reevaluated between January 1, 1960, and January 31, 2009. 查找EMBASE与MEDLINE确认了收纳在妊娠糖尿病后发生第二型糖尿病女性的世代研究，且重新检阅1960年1月1日到2009年1月31日之间的研究结果；
