Table 1.

Study outcomes and definitions.

Study outcome	Analysis denominator	Outcome definition
Recognition of CKD	Study eligible and no documentation of CKD at index	CKD diagnosis code (ICD10) assigned at an inpatient or outpatient encounter, or the entry of CKD diagnosis on the problem list, from index through 18 months post-index
BP control	Study eligible and BP care gap identified at indexa	Most recent systolic BP (SBP) and diastolic BP (DBP) values in the 18 months post-index in the recommended range using office BP measurements
ACEI or ARB use	Study eligible and ACEI / ARB use care gap identified at indexa	Prescription for an ACEI or ARB medication in the 18 months post-index
Glucose control	Study eligible and glucose care gap identified at indexa	Last A1C value in the 18 months post-index below the A1C goal recommendation
Nephrology referral	Study eligible and nephrology visit care gap at indexa	Referral to nephrology (electronic) in the 18 months post-index period.

^aCare gaps for the analysis denominators are the same as those defined in the inclusion criteria.