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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Crit Care Med. 2013 Mar;41(3):886–896. doi: 10.1097/CCM.0b013e31827bfc3c

Table 3. Description of features for example data sources containing critically ill patients.

Type of Data Clinical Detail Example Data Sources Represented population Accessibility/cost Notes
Publicly-available studies High Acute respiratory Distress Syndrome Network(52) Specific to individual studies High/free Application for data available online
Electronic medical record High Multiparameter Intelligent Monitoring in Intensive Care II(68) >30,000 ICU patients at Beth Israel Deaconess since 2002 High/free Minute-to-minute data on physiologic variables; time-stamped treatments
High Veterans Affairs, Inpatient Evaluation Center(62) >100 Veterans hospitals Low/variable Allows for rich risk adjustment on par with APACHE. Use requires partnering with VA investigator.
High Epic, Cerner, local systems Usually limited to local health system unless EMR system widely disseminated Low/variable
Quality improvement, benchmarking High Michigan Hospital Association Keystone initiative(130) 10 participating hospitals in Michigan Low/- Use usually requires partnering with Keystone investigator
High APACHE(75) 45 voluntarily hospitals Low/- Use requires partnering with Cerner
High eICU Research Institute (formerly VISICU)(79) >1million patients in >180 non-federal voluntary hospitals Low/- Use requires partnering with University of Maryland.
Moderate to low University Health System Consortium(131) 90% academic and affiliated hospitals in US Moderate/-
Registries Moderate National Trauma Data Bank(82) Nationally representative sample of trauma Moderate/$200/yr Relatively inexpensive; obtained from the American College of Surgeons.
Moderate American Heart Association Get With the Guidelines Resuscitation(87) > 400 voluntarily participating hospitals Moderate/free
Administrative/utilization claims Moderate Premier Perspective(105) Discharges of all payers from over 600 hospitals Moderate/>$50,000 - $100,000 Nation's largest inpatient drug utilization database and uniquely includes timestamps for labs, tests, procedures
Moderate to low MarketScan(102) >36 million discharges; >100 insurers Low/thousands
Moderate to low Medicare(93) Currently enrolled beneficiaries Moderate/$900-$20,000/file/year Inpatient + skilled nursing combined file (MedPAR) ∼ $900-$3500
Low National Hospital Discharge Database(27) Nationally representative sample of more than 300 hospitals High/free Maintained by the CDC and downloadable from internet
Healthcare Cost and Utilization Project(98)
Low Kids' Inpatient Database Hospital discharges from 44 participating states High/$200-$350/year Price discounted for students
Low National Inpatient Sample Nationally representative sample of hospital discharges High/$160-$322/year Price discounted for students
Low State Emergency Department Databases ED discharges without admission from 37 participating states High/$35-$1600/state/year Price discounted for students
Low State Inpatient Databases Hospital discharges from 44 participating states High/$35-$3500/state/year Price varies for profit/non-profit requestors