Abnormality

Jul 5, 2016 by in INFECTIOUS DISEASE Comments Off on Abnormality

Abnormality … the medical meaning of “normal” has been lost in the shuffle of statistics. —Alvan Feinstein 1977 KEY WORDS Nominal data Dichotomous data Ordinal data Interval data Continuous data…

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Frequency

Jul 5, 2016 by in INFECTIOUS DISEASE Comments Off on Frequency

Frequency Here, it is necessary to count. —P.C.A. Louis† 1787-1872* KEY WORDS Numerator Denominator Prevalence Point prevalence Period prevalence Incidence Duration of disease Case fatality rate Survival rate Complication rate…

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Introduction

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Introduction We should study “the benefits of medical interventions in relation to their hazards and costs.” —Kerr L. White 1992 KEY WORDS Clinical epidemiology Clinical sciences Population sciences Epidemiology Evidence-based…

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