Figure 1:

Denominator selection process (patients and visits) Data Source: EHR data from 2012 and 2013; (a) total number of unique patients or visits may not equal to sum of individual items as some patients or visits may have multiple items (i.e., items are not mutually exclusive); (b) eligible encounters: follow-up, initial consult, office visit, pre-op visit, and surgical consult; (c) multi-day visit was assumed a non-outpatient visit; (d) ineligible patients based on the defined age range; (e) weight is valid but BMI is missing and height is invalid; (f) height is valid but BMI is missing and weight is invalid; (g) BMI is out of range; (h) 2013 BMI records were excluded as only 2012 BMI records were used in the model; and, (i) final denominator of patients included in the study.