Observational Studies

Some articles on observational studies, observational, studies:

Clinical Trial - Design
... in evidence-based medicine is between observational studies and randomized controlled trials ... Types of observational studies in epidemiology, such as the cohort study and the case-control study, provide less compelling evidence than the randomized controlled trial ... In observational studies, the investigators only observe associations (correlations) between the treatments experienced by participants and their health status or diseases ...
Propensity Score Matching
... In the statistical analysis of observational data, propensity score matching (PSM) is a statistical matching technique that attempts to estimate the effect of a ... and Donald Rubin in 1983, and implements the Rubin causal model for observational studies ... Unfortunately, for observational studies, the assignment of treatments to research subjects is, by definition, not randomized ...
Hyperbaric Medicine - Clinical Evidence - Neuro-rehabilitation
... in traumatic brain injury identified 2 randomized controlled trials and 5 observational studies that met evaluated functional health outcomes ... The studies ranged from fair to poor in quality ... The observational studies were weak in quality and did not provide enough evidence of clinical improvement following HBOT treatment ...

Famous quotes containing the word studies:

    His life itself passes deeper in nature than the studies of the naturalist penetrate; himself a subject for the naturalist. The latter raises the moss and bark gently with his knife in search of insects; the former lays open logs to their core with his axe, and moss and bark fly far and wide. He gets his living by barking trees. Such a man has some right to fish, and I love to see nature carried out in him.
    Henry David Thoreau (1817–1862)