Large sample, prospective, randomized controlled studies on treatment are scarce.
在治疗上还缺少大样本、前瞻性随机对照性研究。
“Take patients who just had a heart attack,” Dr. Khatib said. “Two randomized controlled studies show that defibrillators do not benefit patients who just had a heart attack.
“选择刚好心脏病发作的患者，”哈提卜博士说。“两组随机的受控对照研究表明，除颤器不能为刚好心脏病发作的患者带来好处。”
Data from 62 studies, including randomized controlled trials and post-marketing studies, were included in the review.
资料来源于62项研究，包括随机对照试验和上市后研究。
Take, for example, those 19 million studies on PubMed.Some are gold-standard research: large, randomized, controlled clinical trials or meta-analyses that carefully parse millions of data points.
就拿PubMed上的1900万份研究论文来说，一小部分堪称一流：大型，随机，受控的临床试验和结果的荟萃分析与论文提供的数据相当吻合。
Take, for example, those 19 million studies on PubMed. Some are gold-standard research: large, randomized, controlled clinical trials or meta-analyses that carefully parse millions of data points.
就拿PubMed上的1900万份研究论文来说，一小部分堪称一流：大型，随机，受控的临床试验和结果的荟萃分析与论文提供的数据相当吻合。
There are about two dozen backward-looking analyses of patient data suggesting keto works, and, more significant, two randomized, controlled studies published in 2008.
过去的24个病例数据表明酮类在此方面的疗效，并且更重要的是，两个随机的有对照的研究在2008年发表。
The approval was based on data from 2 prospective, randomized, double-blind placebo-controlled clinical studies.
这次批准的依据是2次前瞻性随机双盲安慰剂控制对照临床研究的数据。
A systematic search for randomized controlled trials and prospective cohort studies comparing home-based and clinic-based medical abortion was conducted.
对比较在家里或在诊所进行药物流产的随机对照试验和前瞻性群组研究进行系统搜索。
Two randomized controlled trials (RCTs), one before-and-after study and two retrospective reports on clinical efficacy and safety were retrieved, together with 18 pharmacokinetic studies.
检索到与临床功效和安全性相关的两个随机对照试验(rct)、一个前后对照研究、两个回顾性报告，以及18个药物动力学研究。
Medical science is not foundedon "common sense, " but on uncommon investigation: on randomized, controlled studies that try to rule out as many confoundingvariables as possible.
医学科学并不是建立在“常识”基础之上的，而是建立在特殊的科学研究之上：为尽可能排除一切混杂变量而在控制范围内随意抽样化验。
They point out that few well-designed studies, following the gold standard of randomized controlled clinical trials, have demonstrated efficacy over placebos.
他们指出，根据随机对照临床试验的黄金标准精心设计的研究很少显示出比安慰剂更好的功效。
Comprehensive randomized controlled spa intervention studies with longer follow-up periods may be helpful in further delineating the therapeutic efficacy of balneotherapy in AS patients.
进一步研究浴疗法对强直性脊柱炎患者的影响，仍需全面随机控制的长周期水疗干预研究。
Further prospective, double-blind, randomized, placebo - controlled studies are needed to assess the optimal overall treatment of this disease, the authors add.
作者称，需要进一步前瞻性，双盲，随机，安慰剂对照研究来评价该病的优化治疗方案。
This isn't a conclusion based simply on some cohort or case-control studies. There are many, many randomized controlled trials.
这一结论不只是基于一些世代研究或病例对照研究，而是基于无数随机对照试验。
Few randomized controlled trials exist. Those that do, although methodologically weak like most nutrition studies, don't support the necessity of breakfast.
很少有人开展随机对照试验。和大多数营养学研究一样，仅有的几项随机对照试验存在方法上的不足，不过它们也不支持有必要吃早餐的观点。
Future studies should include a randomized controlled trial of exercise training that can reveal its direct effects on NAFLD histopathology, they suggest.
他们建议，未来的研究应该包括运动练习的随机对照试验，以展示它对NAFLD组织病理学的直接作用。
However, large, randomized controlled, prospective studies are still needed to ascertain the short - and long-term efficacy and safety of metformin to mothers and infants.
但是，其对母婴的近期和远期安全性尚有待更大型的、随机、对照、前瞻性研究证实。
Systematic reviews of non-randomized studies are as common as reviews of randomized controlled trials.
非随机对照试验的系统评价与随机对照试验的系统评价一样是普遍开展的。
But those studies had some methodological and study design flaws, which will be avoided in this new, carefully planned and controlled, prospective randomized clinical study.
但是，这些研究在研究方法和研究设计上有一定的缺陷，本次研究将极力避免这样的缺陷，而进行精心策划和控制和前瞻性的临床研究。
Evidence Acquisition Systematic search of MEDLINE to identify peer-reviewed clinical trials, randomized controlled trials, meta-analyses, and other studies with clinical pertinence.
分类检索MEDLINE中的同行评审临床试验、随机对照试验、meta分析和其他临床相关研究。
However, there were some differences among enrolled quality of studies. It is needed to design more strictly randomized controlled trials to validate these conclusions.
但由于纳入研究质量差异较大，有必要开展设计更严谨的随机对照试验来验证该结论。
Methods: According the request of prospective studies, this research observed 64 cases of LDH with randomized and controlled methods.
方法：根据前瞻性研究的要求，本课题对64例腰椎间盘突出症患者进行了随机对照观察。
All the sub-studies were randomized, placebo-controlled, double-blind and had a parallel-group design.
所有研究均为随机、空白- 对照、双盲的平行设计试验。
The local interventional chemotherapy is apprved in some studies with small sample, but still lacks of large sample randomized controlled study to confirm.
局部介入化疗在小样本的研究中获得肯定，但仍缺乏大样本随机对照研究予以证实；
The local interventional chemotherapy is apprved in some studies with small sample, but still lacks of large sample randomized controlled study to confirm.
局部介入化疗在小样本的研究中获得肯定，但仍缺乏大样本随机对照研究予以证实；
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