A simplified guide to determination of sample size requirements for estimating the value of intraclass correlation coefficient: a review
- Author:
Mohamad Adam Bujanga
;
Nurakmal Baharum
- Publication Type:Review
- Keywords:
coefficient;
correlation;
intraclass, sample size
- From:Archives of Orofacial Sciences
2017;12(1):1-11
- CountryMalaysia
- Language:English
-
Abstract:
Intraclass correlation coefficient (ICC) measures the extent of agreement and consistency among
raters for two or more numerical or quantitative variables. This review paper aimed to present several tables that
could illustrate the minimum sample sizes required for estimating the desired effect size of ICC, which is a
measurement of the magnitude of an agreement. Determination of the minimum sample size under such
circumstances is based on the two fundamentally important parameters, namely the actual value of the ICC and
the number of observations made by each subject. The sample size calculations are derived from Power Analysis
and Sample Size (PASS) software where the alpha and minimum required power is fixed at 0.05 and higher than
0.80 respectively. A discussion on how to use these tables for determining sample sizes required for each of the
various scenarios and the limitations associated with their use in each of these scenarios is provided.
- Full text:P020170509290326188200.pdf
