Regardless of how the data are collected, the reliability of data abstraction methods used in performance measure assessment should be validated by inde- pendent review of a subset of cases consisting of manual chart review (in the case of electronically derived performance data) or independent abstracter review (in the case of chart review based performance data). To avoid bias and to ensure accurate numerators and denominators for reporting of overall hospital compliance with these performance measures, we recommend that data should be collected on all consecutive patients rather than a convenience sample. Discussion The goal of this project has been to develop an ICH-specific performance measure set derived from high-level recommen- dations from evidence-based guidelines. These performance measures are based principally on the AHA/ASA guidelines for management of spontaneous ICH and were developed with the use of standardized prespecified criteria delineated by the AHA and American College of Cardiology for overall performance measure development. Each performance mea- sure derives directly from a Level I or Level III recommenda- tion from the 2015 AHA/ASA ICH guidelines, although in several instances the specific wording and construction of the performance measures were revised or enhanced to harmonize with existing performance measures in use from other orga- nizations, to align with similar measures for ischemic stroke that reasonably apply across all stroke subtypes, and to allow formal measurement for reporting purposes. The purpose of these performance measures is to improve the quality of care for patients with ICH by providing hospitals, stroke teams, and regulatory bodies with a way to directly measure and potentially benchmark this quality of care. 