Calculating Sample Size For Prevalence Study. This video is a simple description of how a sample size for a prevalence study can be obtained by Sudanese registrars embarking on their MD Thesis research. With a low or high prevalence the study may be overpowered in one subpopulation.
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5 Percent of Exposed with Outcome. 95 Power1-beta chance of detecting. One further issue is the correct pre-specification of the true prevalence.
Inputs are the assumed or estimated value for the proportion the desired level of confidence the desired precision of the estimate and the size of the population for limited population sizes.
If the population size. The sample size was determined by using the following formula Arya et al 2012. In this context a general problem arises. Level of the confidence interval.
