. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: J Appl Stat. 2013 Sep 5;41(1):10.1080/02664763.2013.834296. doi: 10.1080/02664763.2013.834296

Table 4. Assessment of match balance for categorical covariates. In the penultimate row, the “Other” category includes valve replacements and transplant recipients.

	Unmatched Sample		Matched Sample

Outcome	LA	Aprotinin	LA	Aprotinin
Diabetes	44.7	24.9	31.0	27.0
Preop Aspirin	27.4	47.5	40.2	44.5
Preop Diuretics	6.5	19.0	11.0	11.0
Preop ACE Inhibitors	16.2	40.7	27.3	32.5
Surgery Type (Transplant/Other)	7.0	16.9	8.6	8.1
Surgery Type (CABG)	65.8	41.2	49.8	61.2