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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: J Clin Epidemiol. 2011 Jan 5;64(7):749–759. doi: 10.1016/j.jclinepi.2010.10.004

Table 4.

Distributions of Three Comorbidity Scores During the Baseline Year in Seniors in the Development Cohort (PA/PACE) and the Validation Cohort (NJ/PAAD)

Mean SD Percentage with Score = 0 Median IQR Range
Development cohort (PA/PACE)
 Romano/Charlson score 3.00 2.81 21.0 2 4 0, 22
 van Walraven/Elixhauser score 5.96 7.36 23.8 4 10 −13, 58
 Combined comorbidity score 1.76 2.59 22.7 1 3 −2, 20
Validation cohort (NJ/PAAD)
 Romano/Charlson score 2.37 2.54 29.9 2 4 0, 21
 van Walraven/Elixhauser score 4.76 6.63 33.1 3 7 −12, 52
 Combined comorbidity score 1.23 2.30 27.1 1 2 −2, 18

IQR, interquartile range; SD, standard deviation