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. Author manuscript; available in PMC: 2018 Jun 11.
Published in final edited form as: JAMA Surg. 2014 Jul;149(7):642–647. doi: 10.1001/jamasurg.2014.166

Table 2.

Results of Coarsened Exact Matching

Age < 65 years
(n = 502,167)		 Age ≥ 65 years
(n = 571,028
Blacks Whites Blacks Whites
All 89,095 413,072 23,703 547,325
Matched 87,485 407,944 23,530 541,946
Unmatched 1,610 5,128 173 5,379
Unmatched Multivariate L1 distance 0.39 0.28
Matched Multivariate L1 distance 0.17 0.18