The Healthcare Analytics Unit (HAU) serves as a resource for Hospital investigators using administrative data to address research questions by providing expertise in analysis data creation, statistical programming, advanced analysis, study design, and sample size calculation. The HAU is a core service unit of two centers in the CHOP Research Institute – the Center for Pediatric Clinical Effectiveness (CPCE) and PolicyLab. CPCE performs clinical epidemiology, health services, and community-based research to elucidate the best practices in the diagnosis, prognosis, and management of pediatric disease. PolicyLab researchers are methodological experts in the disciplines of epidemiology, health services research, program evaluation, and ethics.