Lin's Concordance Correlation Coefficient

vincem

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

 

Byron_JMP

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 )
);