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31 de mar. de 2022 · An observational study is used to answer a research question based purely on what the researcher observes. There is no interference or manipulation of the research subjects, and no control and treatment groups. These studies are often qualitative in nature and can be used for both exploratory and explanatory research purposes.
- Content Manager
- Scribbr
1 de jun. de 2018 · Observational studies provide critical descriptive data and information on long-term efficacy and safety that clinical trials cannot provide, at generally much less expense. Observational studies include case reports and case series, ecological studies, cross-sectional studies, case-control studies and cohort studies.
- Julia Fiona-Maree Gilmartin-Thomas, Danny Yearn Hian Liew, Ingrid Kate Hopper
- 2018
Cohort studies and case-control studies are two primary types of observational studies that aid in evaluating associations between diseases and exposures. In this review article, we describe these study designs, methodological issues, and provide examples from the plastic surgery literature.
- Jae W. Song, Kevin C. Chung
- 10.1097/PRS.0b013e3181f44abc
- 2010
- 2010/12
17 de ene. de 2020 · The aim of correlational study design or research is to uncover any types of systematic relationships between the studied variables. Ecological studies are often used to measure the prevalence and incidence of disease, mainly when the disease is rare.
- Assad A Rezigalla
- 10.7759/cureus.6692
- 2020
- Cureus. 2020 Jan; 12(1): e6692.
The observational study definition states that researchers only observe the outcomes and do not manipulate or control factors. Despite this limitation, there various types of observational studies. The following experimental designs are three standard types of observational studies.
An observational study is when researchers are looking at the effect of some type of intervention, risk, a diagnostic test or treatment, without trying to manipulate who is, or who isn’t, exposed to it.
In fields such as epidemiology, social sciences, psychology and statistics, an observational study draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints.
