Invited commentary: positivity in practice

Positivity, or the experimental treatment assignment assumption, requires that there be both exposed and unexposed participants at every combination of the values of the observed confounders in the population under study. Positivity is essential for inference but is often overlooked in practice by e...

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Veröffentlicht in:	American journal of epidemiology 2010-03, Vol.171 (6), p.674-677
Hauptverfasser:	Westreich, Daniel, Cole, Stephen R
Format:	Artikel
Sprache:	eng
Schlagworte:	Bias Biometry - methods Causality Confounding Factors (Epidemiology) Data Interpretation, Statistical Epidemiologic Methods Humans Practice of Epidemiology Propensity Score
Online-Zugang:	Volltext
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