Case-control studies: an efficient study design

Case-control studies--an efficient observational study design.

Case-control studies are an efficient research method for investigating risk factors of a disease. The method involves the comparison of the odds of exposure in a patient group with that of the odds of exposure in a control group. As only a minority of the population is included in the study, less time can be devoted to those who remain free of the disease of interest. The design of a case-cont...

Case control design: an efficient method to identify risk factors

Executive summary A case control study is a special type of retrospective study which can be used to identify risk factors or biomarkers for a disease. It requires relatively small sample sizes relative to a cohort study, particularly when the disease of interest is rare. This document describes how to design and perform a case control study and gives an example of how it might be relevant to c...

Traffic Control Activities and Design: Case Studies

The investigations which we will be discussing here form part of a programme whose objective is the design of computer systems in terms of support systems for users. This programme was initiated by an investigation aimed at designing a system for a data collection and coding station (Pinsky 1979). Since then, it has been applied to various work situations, in offices, services, the management o...

Design and analysis of case-control studies.

an investigation about the relationship between insurance lines and economic growth; the case study of iran

مطالعات قبلی بازار بیمه را به صورت کلی در نظر می گرفتند اما در این مطالعه صنعت بیمه به عنوان متغیر مستفل به بیمه های زندگی و غیر زندگی شکسته شده و هم چنین بیمه های زندگی به رشته های مختلف بیمه ای که در بازار بیمه ایران سهم قابل توجهی دارند تقسیم میشود. با استفاده از روشهای اقتصاد سنجی داده های برای دوره های 48-89 از مراکز ملی داده جمع آوری شد سپس با تخمین مدل خود بازگشتی برداری همراه با تعدادی ...