Estimating multiple morbidity disease burden among older persons: a convergent construct validity study to discriminate among six chronic illness measures, CCHS 2008/09

Table 3 Bivariate correlation coefficients between multimorbidity measures and health outcomes,* relative percentage change in coefficients, and matrix of intercorrelation statistical tests of associations* (n = 16,369)

	Multi-morbidity dichotomized (0, 1+) (Reference)	Multi-morbidity dichotomized (0/1, 2+)	Multi-morbidity additive scale	Multi-morbidity weighted by HUI3	Multi-morbidity weighted by ADL	Multi-morbidity weighted by HUI3 (Betas)
Life Satisfaction	-.10^a	-.14^a (40.0)*	-.23^b (130.0)	-.24^b (140.0)	-.24^b (140.0)	-.24^b (140.0)
Perceived Health	-.15^a	-.25^a (66.7)	-.39^b (160.0)	-.39^b (160.0)	-.39^b (160.0)	-.39^b (153.3)
Health Prof. Visits	.14^a	.19^a (35.7)	.22^b (57.1)	.22^b (57.1)	.22^b (57.1)	.21^b (50.0)
Medication(s) Used Daily	.30^a	.42^a (40.0)	.55^a (83.3)	.48^c (60.0)	.50^d (66.7)	.43^e (43.3)

*All correlations are statistically significant at the p < .001 level.
**Values in parentheses represent percentage increase in strength of association between multimorbidity measures and health outcome (rows) using the Multimorbidity Dichotomized (0, 1+) measure as the reference.
***Intercorrelation matrix notes:
^aCorrelation differs significantly from all other multimorbidity measures.
^bCorrelation only differs significantly from the two dichotomous multimorbidity measures.
^cCorrelation differs significantly from all other multimorbidity measures, except Multimorbidity Weighted by ADL.
^dCorrelation differs significantly from all other chronic illness measures, except Multimorbidity Weighted by HUI.
^eCorrelation differs significantly from all other chronic illness measures, except Multimorbidity Dichotomized (0/1,2+).

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