Computational methods for case-cohort studies
نویسندگان
چکیده
Computational methods, which can be implemented using standard Cox regression software, are given for fitting “exact” pseudolikehood estimates and robust and asymptotic variance estimators from case-cohort data. These methods are based on the computational approach of Therneau and Li (1999) but will be less subject to small sample bias. Further, it is shown how cumulative hazard or survival curves can be computed from case-cohort data and how to accommodate time dependent covariates. Extensions to stratified case-cohort sampled data are also provided. The methods are illustrated in analyses of case-cohort samples from a study of radiation exposure from fluoroscopy and breast cancer using SAS software. ∗Corresponding author: Phone: (323) 442-1212, Fax: (323) 442-2349
منابع مشابه
بررسی روند مطالعات مورد ـ شاهد لانه گزیده و مقایسهی آن با مطالعات همگروهی و مورد ـ شاهد از سال 2005 ـ 1996
Background & Objectives: This investigation was prompted by the growing importance of nested case-control studies and the increasing frequency with which they are done in epidemiologic research. After a brief explanation of nested case-control studies, we evaluate the trends in research methodology over the last decade, especially with regard to cohort, case-control, and nested case-control des...
متن کاملمقایسه نتایج عملکرد مطالعه مورد-همگروهی با مطالعه همگروهی در بررسی ارتباط دیابت با بیماری های قلبی عروقی در مطالعه قند و لیپید تهران
Background & Objectives: The case-cohort study is one of the youngest designs in epidemiology and some methodological aspects of it are still in debate. This study aimed at comparing the estimated hazard ratio, standard error, and interaction hazard ratio between the case-cohort and cohort studies for assessing the relationship between diabetes and cardiovascular diseases.Methods: A total of 17...
متن کاملQuality of Reporting of Cohort Studies Investigating Preconception Risk Factors of Gestational Diabetes According to the STROBE Statement
Background and Objectives: The results of cohort studies could be used in evidence-based medicine in case they have a good quality and robust methodology. Therefore, this study was conducted to assess the quality of cohort studies investigating preconception risk factors of gestational diabetes. Methods: In this cross-sectional study, the cohort studies investigating the preconception risk ...
متن کاملسخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره 18، مرداد 1398، 416-415 مطالعات مورد – همگروهی و مطالعه مورد - شاهدی لانه گزینی شده Case – Cohort Studies and Nested Case- Control Studies محسن رضائیان[1] M. Rezaeian مطالعات همگروهی (Cohort Studies) اطلاعات گرانبهایی را درباره مواجهه با عوامل گوناگون ...
متن کاملA comparative review of various interventional methods for coronary angiography and angioplasty
Background and Objective: Coronary artery disease (CAD) is one of the most common diseases today. Among the diagnostic methods, angiography is the main and gold standard in the diagnosis Since angiography is an invasive procedure, this procedure complications range widely from minor problems with short term sequelae to life threatening ones may cause irreversible damage or even death. Materials...
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Computational Statistics & Data Analysis
دوره 51 شماره
صفحات -
تاریخ انتشار 2007