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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: JAMA Intern Med. 2015 Jun;175(6):941–950. doi: 10.1001/jamainternmed.2014.7856

Figure 2. Standardized Differences Between Variables Before and After Propensity Matching for Intra-aortic Balloon Pumps vsPercutaneous Ventricular Assist Devices.

Figure 2

Vertical dotted lines indicate the acceptable range of standardized difference after propensity score matching (0-10%). CABG indicates coronary artery bypass graft; COPD, chronic obstructive pulmonary disease; PCI, percutaneous coronary intervention.