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formula for sample size cross sectional study. ICCDEFF-1k-1 An important feature of the ICC is that it is not affected by the number of observations per cluster whereas the DEFF is strongly affected. 95 Power1-beta chance of detecting.
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So to increase accuracy we simply need to increase the sample size. Prevalence of preclinical disability in q. Up to a maximum of 20 of p.
Where d 0.
Relative precision a proportion of p. For cost outcomes for the median cv value observed in the MELODY study 072 a sample size of approximately 200 would be required to generate a 95 CI precise to within 10 of the mean. Relative precision a proportion of p. Prevalence of preclinical disability in q.
