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Table 2 Microcosting data items required from Calgary, Alberta sites

From: Protocol for a parallel economic evaluation of a trial comparing two surgical strategies in severe complicated intra-abdominal sepsis: the COOL-cost study

VariableDescriptionData requiredData source
Baseline/Admission data
Patient unique identifierSingle datum permitting linkage across multiple databasesUnique Lifetime IdentifierCOOL trial
Hospital at enrolmentHospital where initial laparotomy is performedSite nameCOOL trial
Patient postal codeApproximate location of patient’s domicile (necessary for calculating transportation costs)Postal codeCOOL trial
Patient ageIn yearsAge in yearsCOOL trial
Patient sexMale, female, otherSexCOOL trial
ICD-10 admission diagnosisSingle admission diagnosisICD-10 codeCOOL trial
Shock at the time of initial ORHypotension requiring pressors for MAP > 65 or serum lactate > 2 mmol/L after resuscitationYes/NoCOOL trial
Admission APACHE II scoreSeverity-of-disease classification scoreScore at time of admissionCOOL trial
Index hospitalization
Operating room
Dates of each operating room encounterDuring index hospitalizationList of datesCOOL trial
Procedures performed at each operating room encounterAll procedure codes includedList of procedure codesCOOL trial
Duration of all operating room encountersDocumented entry into and exit from operating roomTime in minutesCOOL trial
Anesthetist billings associated with each operating room encounterTotal physician claimsBillings in CADAlberta Medical Association (AMA) fee schedule
Surgeon billings associated with each operating room encounterTotal physician claimsBillings in CADAMA fee schedule
Operating room drug costsList, quantity, and cost of all medications used during surgeryMedications and costsFinance oracle microcosting database (Oracle)
List and quantity of disposables used at each surgical encounterAll non-sterilizable surgical tools designed for one-time use, as well as suture materials and dressingsList and quantityOracle
Surgical instrument sets used at each surgical encounterName of each set used (e.g., major abdominal)List of instrument setsOracle
Postoperative care
Length of stay in ICU and costStay in a designated critical care environmentLength in daysCOOL trial, Oracle
Length of stay on general ward and costLength of hospital stay, less the length of ICU stayLength in daysCOOL trial, Oracle
Length of stay in post-anesthesia care unitStay in a designated PACULength in daysOracle
Direct and indirect costs of PACU stayItemized cost of PACU stay including personnel, disposables, medications, and overhead costsCosts in CADOracle
Physician billings associated with hospital stayTotal Alberta Health billings, less surgeon, and anesthetist operative billingsBillings in CADAHS data analytics (DIMR)
Postoperative diagnostic imaging costsTotal of per-study fees, plus the AHS billings of diagnostic radiologistsCosts in CADOracle
Postoperative percutaneous procedure costsTotal of per-procedure fees, plus the AHS billings of interventional radiologistsCosts in CADOracle
Costs of laboratory testingTotal in-hospital laboratory testing, less total study-specific laboratory testing costsCosts in CADOracle
Inpatient drug costsTotal pharmaceutical costsCosts in CADOracle
Cost of blood products usedTotal cost of in-hospital blood product useCosts in CADOracle
Cost of nursing and allied health care not included in per-diem unit costTotal cost of specialized RN and other allied health providersCosts in CADOracle
Cost of disposables used in postoperative patient careTotal cost of disposablesCosts in CADOracle
Follow-up care
Number of surgeon visits (to 1 year)Regardless of reason for visitNumber of visitsDIMR
Number of other specialist physician visits (to 1 year)Regardless of reason for visitNumber of visitsDIMR
Total outpatient AHS billingsRegardless of reason for servicesBillings in CADDIMR
Readmissions
Number and length of each readmission within 1 yearRegardless of reason for readmissionNumber and length in daysDIMR
Total hospital cost, including physician billings, associated with each readmissionRegardless of reason for visitCosts in CADDIMR
Subsequent OR costs
Dates of each operating room encounter within 1 yearAfter index hospitalizationList of datesCOOL trial
Procedures performed at each operating room encounterAll procedure codes includedList of procedure codesCOOL trial
Duration of all operating room encountersDocumented entry into and exit from operating roomTime in minutesCOOL trial
Anesthetist billings associated with each operating room encounterTotal physician claimsBillings in CADAMA Fee Schedule
Surgeon billings associated with each operating room encounterTotal physician claimsBillings in CADAMA Fee Schedule
List and quantity of disposables used at each surgical encounterAll non-sterilizable surgical tools designed for one-time use, as well as suture materials and dressingsList and quantityOracle
Surgical instrument sets used at each surgical encounterName of each set used (e.g., major abdominal)List of instrument setsOracle
Ambulatory care costs
Number, type, and cost of all other ambulatory encounters (other than family physician and specialist encounters)All day medicine and day surgery encounters (including dialysis) within one yearNumber, type, and costs in CADDIMR
Costs to patients and caregivers
Cost of transportation to and from family physician and specialist appointmentsTotal estimated costsNumber of visits, approximate distance to domicileDIMR
Productivity costs
Number of days absent from work at 1 yearSelf-reported number of days absent from workTotal daysCOOL trial
Outcomes
Mortality at 90 daysPrimary outcomeDichotomous variableCOOL trial
Mortality at 1 yearLong-term survivalDichotomous variableCOOL trial
Presence of a stoma at initial hospital dischargeIleostomy or colostomyDichotomous variableCOOL trial
Presence of a stoma at 90 days and 1 yearIleostomy or colostomyDichotomous variableCOOL trial
EQ-5D-5 L and SF-36 at 90 daysValidated quality of life measureValues at 90 daysCOOL trial
EQ-5D-5 L and SF-36 at 1 yearValidated quality of life measureValues at one yearCOOL trial