Analysis of method-comparison data.
Method-comparison studies, in which new 'candidate' techniques are compared with an established 'gold standard', feature commonly in optometric research. Investigators often analyse their findings using least squares regression, Pearson's product-moment correlation coefficient and the paired t-test. We describe more appropriate methods which include: the 'limits of agreement', the intraclass correlation coefficient, and Deming's method for estimating a straight line fit. Comparisons between methods are made with the aid of a computer simulation. Computer program listings are provided to assist in implementing the analyses.
Shaw
D E
DE
Department of Ophthalmology, University of Birmingham, UK.
Jones
H S
HS
Moseley
M J
MJ
D003198:Computer Simulation; D009907:Optometry; D012044:Regression Analysis; D012107:Research Design; D012984:Software; D013223:Statistics as Topic / Q000379:methods*