The prevention and treatment of missing data in clinical trials.

نویسندگان

  • Roderick J Little
  • Ralph D'Agostino
  • Michael L Cohen
  • Kay Dickersin
  • Scott S Emerson
  • John T Farrar
  • Constantine Frangakis
  • Joseph W Hogan
  • Geert Molenberghs
  • Susan A Murphy
  • James D Neaton
  • Andrea Rotnitzky
  • Daniel Scharfstein
  • Weichung J Shih
  • Jay P Siegel
  • Hal Stern
چکیده

Missing data have seriously compromised inferences from clinical trials, yet the topic has received little attention in the clinical-trial community.1 Existing regulatory guidances2-4 on the design, conduct, and analysis of clinical trials have little specific advice on how to address the problem of missing data. A recent National Research Council (NRC) report5 on the topic seeks to address this gap, and this article summarizes some of the main findings and recommendations of that report. The authors of this article served on the panel that prepared the report.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Effect of Aloe Vera Clinical Trials on Prevention and Healing of Skin Wound: A Systematic Review

Background: Aloe vera is an herbaceous and perennial plant that belongs to the Liliaceae family and used for many medicinal purposes. The present study aimed to systematically review clinical trials regarding the effect of Aloe vera on the prevention and healing of skin wounds.Methods: To identify all related published studies, we searched SID, IRANDOC, Google Scholar, PubMed, MEDLINE, Scopus, ...

متن کامل

تحلیل به قصد درمان در مطالعات کارآزمایی بالینی: یک مطالعه مروری

Background & Aim: Randomized controlled trials often suffer from two major problems, i.e., noncompliance and missing outcomes. One potential solution to this problem is using the intention-to-treat (ITT) analysis approach. Therefore, the aim of this study was to review the concept of ITT and the most important issues related to it in practice since RCT researchers utilize it as a guide in order...

متن کامل

A comparison of missing data methods for hypothesis tests of the treatment effect in substance abuse clinical trials: a Monte-Carlo simulation study

BACKGROUND Missing data due to attrition are rampant in substance abuse clinical trials. However, missing data are often ignored in the presentation of substance abuse clinical trials. This paper demonstrates missing data methods which may be used for hypothesis testing. METHODS Methods involving stratifying and weighting individuals based on missing data pattern are shown to produce tests th...

متن کامل

چند رویکرد برخورد با مقادیر گمشده‌ متغیرهای کمی و بررسی اثر آنها بر نتایج حاصل از یک کارآزمایی‌ بالینی

Background and Objectives: A major challenge that affects the longitudinal studies is the problem of missing data. Missing in the data may result in the loss of part of the information which reduces the accuracy of the estimator and obtain the results will be biased and inaccurate. Therefore, it is necessary to evaluate the missing data mechanism from a longitudinal research and to consider thi...

متن کامل

Prebiotic and...

Prebiotic: A nondigestible food ingredient that benefits the host by selectively stimulating the favorable growth and/ or activity of 1 or more indigenous prebiotic bacteria. Prebiotics can modify the intestinal flora and interact with the immune system of the host against specific pathogens. However clinical trials are currently limited and a beneficial effect of prebiotic in treatment acute d...

متن کامل

O-18: Framework of Informed Consent and Ethical Codes for Clinical Trials Especially Designed for Assisted Reproduction

Background Clinical trials are known as the most valid medical research. It is able to promote medical evidences on prevention, diagnosis, screening, treatment, and quality of life because in this type of study, an intervention is intentionally performed on subjects. Therefore, it encompasses ethical concerns and considerations, especially when human subjects are studied. In other words, clinic...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The New England journal of medicine

دوره 367 14  شماره 

صفحات  -

تاریخ انتشار 2012