Clinical Research Methodology 2: Observational Clinical
ction. Observational studies are subject to errors attributable to selection bias, confounding, measurement bias, and reverse causation—in addition to errors of chance. Confounding can be statistically controlled to the extent that potential factors are known and accurately measured, but, in practice, bias and unknown confounders usually remain additional potential sources of error, often of ...
DA: 9 PA: 59 MOZ Rank: 28