Table 2.

Proportion^a of the osteoarthritis population in CCAE, MDCR, and Optum CDM databases with 0, 1, 2, 3 or at least 4 CMCOI

Number of CMCOI	CCAE (%)	MDCR (%)	Optum CDM (%)
0	52.0	25.6	31.4
1	39.0	51.2	45.9
2	7.9	19.1	17.9
3	1.0	3.8	4.3
$\ge 4$	0.1	0.4	0.5

CCAE IBM MarketScan Commercial Database, CMCOI coexisting medical conditions of interest, MDCR IBM MarketScan Medicare Supplemental Database, Optum CDM Optum’s de-identified Clinformatics^® Data Mart Database

^aProportions may not sum to 100% because of rounding