topic Re: Lin's Concordance Correlation Coefficient in Discussions

Lin's Concordance Correlation Coefficient

vincem — Thu, 28 Nov 2024 22:53:14 GMT

Hi All

Is there a procedure in JMP that computes Lin's Concordance Correlation Coefficient?

The concordance correlation coefficient (Lin, 1989) evaluates the degree to which pairs of observations fall on the 45° line through the origin.

Lin L.I-K (1989) A concordance correlation coefficient to evaluate reproducibility. Biometrics 45:255-268

Cheers Vince

Re: Lin's Concordance Correlation Coefficient

Byron_JMP — Mon, 02 Dec 2024 14:57:52 GMT

maybe take a look at the Passing Babcock fit, or the Orthagonal fit in the Fit Y by X platform

This isn't good data for the example but you'll get the idea of what the reports contain

These are pretty standard methods for comparing measurements where there is error in both the X and Y.

dt=Open( "$SAMPLE_DATA/Big Class.jmp" );
dt<<Bivariate(
	Y( :height ),
	X( :weight ),
	Fit Passing Bablok( {Equality Line( 1 ), Line Color( {230, 159, 0} )} ),
	Fit Orthogonal( Univariate Variances, {Line Color( {86, 180, 233} )} ),
	SendToReport(
		Dispatch( {}, "weight", ScaleBox,
			{Min( 33.736 ), Max( 180 ), Inc( 20 ), Minor Ticks( 0 )}
		),
		Dispatch( {}, "height", ScaleBox,
			{Min( 33.736 ), Max( 180 ), Inc( 20 ), Minor Ticks( 0 )}
		)
	)
);

dt<<Matched Pairs(
	Y( :height, :weight ),
	Reference Frame( 1 ),
	Bland Altman Analysis( 1 )
);

Re: Lin's Concordance Correlation Coefficient

vincem — Mon, 02 Dec 2024 20:45:54 GMT

thanks- i dont see the Lins co-efficeint.