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Premier is a full clinical and financial database. Inpatient, outpatient clinics within the hospital system, and pharmacy claims are available from 2000 containing over 96 million patients and 390 million hospital discharges. Inpatient, outpatient, and pharmacy claims are linked by patient. EHR data is available through chart abstractions if needed and is linked with Optum/Quality Metrics. This linkage can also provide long-term care data.The database is a complete census of all US patients in hospitals with no selection bias and no gaps in the data. 12+ years and 96+ million patients and 390+ million discharges.Premier contains inpatient, outpatient, disease, and mortality data. On its ownPremier captures all inpatient charge information and the link with Optum captures actual claims. The following charge data master information is available: hospital inpatient records, admission date, discharge date, and procedure codes. The following outpatient data is available: non-hospital patient records, date of service, and procedure codes. All disease are included in the database and severity is measured through the 3M APR-DRG Severity of Illness code. Mortality data is captured.

Chi-Squared Test (41.05%), K-Means (38.95%), Decision Tree Model (27.37%), Logistic Regression (21.05%), Propensity Score Matching (14.74%), Kruskal-Wallis Test (13.68%), Linear Discriminant Analysis (11.58%), Regression Model (11.58%), Linear Regression (8.42%), T-Test (8.42%)