Discharge Abstracts Database (Hospital Separations file)

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Date Range: April 1, 1985 onwards (fiscal year)

Data Source: BC Ministry of Health

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Description

Data on discharges, transfers and deaths of in-patients and day surgery patients from acute care hospitals in BC.

All Canadian hospitals (except those in Quebec) submit their separations records directly to the Canadian Institute of Health information (CIHI) for inclusion in the Discharge Abstract Database (DAD). The database contains demographic, administrative and clinical data for hospital discharges (inpatient acute, chronic, rehabilitation) and day surgeries. A provincial dataset, including various CIHI value-added elements (such as case mix groups, and resource intensity weights) is released on a monthly basis to the respective Ministries of Health. The DAD data files which Population Data BC receives include the CIHI variables. Population Data BC receives these data once per year.

Inclusions

  • Discharges, transfers and deaths of in-patients and day surgery patients (e.g. those undergoing scope procedures, cataract procedures, or other procedures requiring operating room time) from acute care hospitals.
  • Data on BC residents who are admitted to a hospital in another province or territory are included in the DAD data. Also included in the data files are data on non-BC residents who are admitted to a BC hospital, however these data are usually excluded from extractions for research projects.
  • The data include some records indicating the level of care is "extended". For the most part, these records refer to people who are in long-term care facilities that are attached to an acute care facility and should be excluded from analyses.

Exclusions

  • Data on abortion procedures, including those conducted in concert with other procedures, are only available by special request. Requests must demonstrate how Therapeutic Abortion (TA) data is required to fulfill the research objectives by providing a strong rationale. The Ministry of Health will review requests and make a decision on release according to existing policy on a case-by-case basis. This is in accordance with the BC Freedom of Information and Protection of Privacy Act article 22.1.
  • Visits to emergency rooms/departments are not recorded in the hospital files, though admissions to acute care via the emergency room are noted in the "entry code" field. The report by McKendry et al, 2002 provides more information on various methods for identifying emergency users.
  • Outpatient services like x-rays or blood work are not included in the hospital data.

Data Changes Over Time

  • Beginning in 1996/97, the mother's personal health number (PHN) was recorded on a baby's discharge record, so it became possible to link mothers and babies in the hospital files.
  • The format of the data changed significantly in 2001/02. Part of this change was due to the switch in BC from coding diagnoses in ICD9 codes to ICD10-CA codes, and from coding procedures/interventions in CCP procedure codes to CCI intervention codes. Beginning in 2001/02, some of the data fields have different names but the same meaning, and some fields may have the same name but contain subtly different data. Population Data BC has standardized the data fields and names across the years where possible.
  • From 2001/02 to 2006/07, i.e. until all provinces in Canada were coding in ICD10-CA and CCI, CIHI was providing both the originally coded diagnosis codes and intervention codes (i.e. ICD10-CA and CCI for BC) and back-coded versions of these codes (i.e. ICD9/CCP codes) in the DAD files. This stopped as of 2007/08.
  • Also as of April 2007, CIHI has redeveloped its acute care inpatient grouping methodology. The new CMG+ methodology is built on ICD10-CA/CCI activity and cost data and replaces the CMG/Plx methodology. CMG+ takes advantage of the increased specificity of the ICD10-CA/CCI classification standards and features several modifications and enhancements.

Quality / Accuracy of Information/Field Coding Source

  • The centralized data processing of the DAD records done by the Canadian Institute of Health information (CIHI) results in increased efficiency and standardization among the participating provinces.

Important Additional Information

  • These data files are grouped into fiscal years by separation date, not the date of admission.

References

  • Several references are available on the CIHI web site (www.cihi.ca) on the impact of CIHI's acute-care inpatient grouping methodology switch, including "Coping with the Introduction of ICD10-CA and CCI: Impact of New Classifications Systems on the Assignment of Case Mix Groups/Day Procedure Groups using Fiscal 2001/2002 Data" and "CMG+ Tool Kit: Transitioning to the new CMG+ Grouping Methodology".
  • McKendry R, Reid RJ, McGrail KM, Kerluke KJ. Emergency Rooms in British Columbia: A pilot project to Validate Current Data and Describe Users. Vancouver (BC): Centre for Health Services and Policy Research; December 2002.

Fields Available

ADMISSIONS RELATED

BC hospital number - Replaced by project-specific identification number

OR

BC hospital number (unencrypted) - Research rationale describing why this field is required must be supplied before it will be considered for release:

A unique three-digit number indicating the facility submitting the abstract. 
Hospital sizeGroups hospitals according to their bed capacity90/91-00/01
Institution number for Out of Province (OOP) facilitiesInstitution numbers for out of province facilities unique to each province/territory. Note coding changes in 2000.91/92 onward
Private hospital numberA facility identifier for British Columbia (BC) private clinics03/04 onward
Province code (location of hospital)The province or territory of patient hospitalization91/92 onward
Resident indicatorDenotes whether the patient is a British Columbia (BC) resident or from out of province90/91-00/01
Province issuing Health Care Number (HCN)Denotes the province (or territory) issuing the patient HCN91/92 onward
Responsibility for paymentIndicated the party responsible for a patient's hospitalization payment (coding changes in 2001/02) 
Third party liability formIndicates when a third party liability for (HIA-14) has been prepared for the recovery of health care costs by the Ministry of Health (e.g., from ICBC). Coding changes over the years (mostly used as a flag).

85/86-89/90
91/92 onward

Level of careIndicated the level of care provided to the patient (e.g., Acute Care, Day Surgery) 
Admission dateThe date that the patient was formally admitted as a patient to the facility 
Admission time - Research rationale describing why this field is required must be supplied before it will be considered for releaseThe time of day the patient was admitted to the facility (hour only up to 2000/01, from 2001/02 onwards complete time is available) 
Admission categoryIndicated the urgency of admission (e.g., elective, emergency). Coding of this field changes in 2001/02. 
Entry codeIndicates the patient’s type or mode of entry to a facility90/91-onward
Readmission codeDenotes a readmission to the acute care unit of the same reporting facility. The focus of the field is whether the readmission was unplanned.01/02- onward
Emergency department registration dateIndicates the calendar date that the patient was registered in the Emergency Department10/11-onward

Emergency department registration time – Research rationale describing why this field is required must be supplied before it will be considered for release:

Indicates the time that the patient was registered in the Emergency Department10/11-onward
Ambulance codeThe type of ambulance that brought a patient to hospital90/00-00/01
Ambulance flagA flag that indicates if a patient arrived by ambulance. Note that from 01/02 onward, this field contains type of ambulance (see previous field).91/92- onward
Admission transfer codes

BC hospital number transferred from Replaced by project-specific identification number

OR

BC hospital number transferred from (unencrypted) – Research rationale describing why this field is required must be supplied before it will be considered for release:

Identifies the hospital a patient was transferred from when they required further treatment 

Level of care transferred from

Indicates the level of care a patient was transferred from, based on Canadian Institute for Health Information (CIHI) codes85/06-00/01
BC care level transferred fromBC transfer level codes indicating the care level transferred from01/02 onward
DISCHARGE RELATED
Discharge (separation) dateThe date that the patient was discharged (separated) from the hospital or facility 

Discharge (separation) time – Research rationale describing why this field is required must be supplied before it will be considered for release:

The time of day the patient was discharged from the facility (hour only up to 2000/01, from 2001/02 onwards complete time is available) 
Left Emergency Room (ER) dateIndicates the date the patient was discharged from the Emergency Room (ER) to an inpatient unit11/12-onward
Left Emergency Room (ER) timeIndicates the time the patient was discharged from the ER to an inpatient unit11/12-onward
Exit and Death codes
Discharge (separation) dispositionThe status of the patient upon leaving the hospital (includes death status)01/02 onward
Exit codeIndicates the type of discharge from the hospital85/86–00/01
Death codeIndicates circumstances of patient death. Replaced from 91/92 by the 4 codes below: autopsy flag, coroner flag, death in OR flag and supplemental death code.85/86-90/91
AutopsyA flag to indicate if an autopsy was performed91/92- 00/01
CoronerIndicates if a coroner/medical examiner was involved following a patient death91/92-00/01
Death in Operating Room (OR) indicatorA flag to indicate the patient death occurred in an operating room/intervention location or during recovery in the post-anesthetic recovery room (coding changes 00/01on);91/92-00/01
Supplemental death codeIdentifies type of patient death, other than an operative death

91/92-00/01

Death in Special Care Unit (SCU) indicatorA flag to indicate death in a Special Care Unit01/02 onward
Discharge transfer codes

BC hospital number transferred to Replaced by project-specific identification number

OR

BC hospital number transferred to (unencrypted) – Research rationale describing why this field is required must be supplied before it will be considered for release:

Identifies the hospital a patient was transferred to when they required further treatment 
Level of care transferred to Indicates the level of care a patient was transferred from, based on Canadian Institute for Health Information (CIHI) codes85/86-00/01
BC care level transferred toBC transfer level codes indicating the level of care a patient was transferred to01/02 onward
Long Term Care (LTC) assessment codeIndicates the last level of LTC assessment for patients occupying acute care beds85/86-95/96
Long term care assessment for Discharge Planning Unit (DPU) codeIndicates the last level of LTC assessment for DPU patients only85/86-95/96
Ventilated on discharge flagIndicates that patient was ventilated on discharge from the reporting facility09/10-12/13
LENGTH OF STAY INDICATORS
Total length of stayThe total number of days the patient was hospitalized from admission to discharge90/91 onward
Length of stay (group 1)Groups of the total number of days from admission to discharge into 21 divisions90/91-06/07
Length of stay (group 2)Groups of the total number of days from admission to discharge into 12 divisions90/91-06/07
Stay by level of care/services
Alternate Level of Care (ALC) daysThe number of ALC days. An ALC patient is one who has finished the acute care phase of treatment but remains in an acute care bed waiting placement in an extended care unit, nursing home, home care program, etc.95/96 onward
Acute/rehab daysThe number of days spent in Acute and Rehab levels only91/92 onward
Rehabilitation days The number of days a patient spent in the rehabilitation care unit in an Acute Care Hospital85/86 onward (except 1990)
Service transfer days [1-3]    The number of days associated with a patient service which is not determined to be the main patient service90/91 onward
In-hospital service transfers [1-3]                      Identifies services, in addition to the main patient service (service most responsible for the care of the patient), that the patient received as part of his/her hospital stay90/91 onward

Stay by hospital unit type

Intensive Care Unit Days captures the total number of days spent in all Special Care Units during a hospital stay. The subsequent ICU days fields refer to stays in specific units (e.g., Medical ICU days). For stays relating to births, see the Newborn/Maternal data field section.
Intensive Care Unit (ICU) days The total number of days spent in all Special Care Units (SCU) during the patients hospital stay85/86 onward
Special Care Unit (SCU) days [1-6]The number of days spent in each Special Care Unit (up to 6 units). Note: These fields do not capture which SCU.01/02 onward
Undefined ICU daysCaptures all unknown Special Care Unit days so that the total of all Special Care Unit days equals total ICU days01/02 onward
Medical ICU days The number of days spent in a Medical Intensive Care Nursing Unit01/02 onward
Surgical ICU daysThe number of days spent in a Surgical Intensive Care Nursing Unit01/02 onward
Combined Medical/Surgical ICU daysThe number of days spent in combined Medical/Surgical Intensive Care Nursing Unit01/02 onward
Neurosurgery ICU daysThe number of days spent in a Neurosurgery Intensive Care Nursing Unit01/02 onward
Paediatric ICU daysThe number of days spent in a Pediatric Intensive Care Nursing Unit01/02 onward
Respirology ICU daysThe number of days spent in Respirology Intensive Care Nursing Unit01/02-02/03
Burn ICU daysThe number of days spent in a Burn Intensive Care Nursing Unit02/03 onward
Cardiac ICU daysThe number of days spent in a Cardiac Intensive Care Nursing Unit01/02 onward
Trauma ICU daysThe number of days spent in the Trauma Intensive Care Nursing Unit01/02 onward
Coronary Care Unit daysThe number of days spent in the Coronary Intensive Care Nursing Unit 
Step-down Medical Unit daysThe number of days spent in the Step-Down Medical Unit01/02 onward
Step-down Surgical Unit daysThe number of days spent in the Step-Down Surgical Unit01/02 onward
Combined Medical/Surgical Step Down Unit daysThe number of days spent in the Combined Medical/Surgical Step Down Unit09/10 onward
Chronic Behaviour Disorder (CBD) Unit daysThe number of days associated with a CBD Unit85/86-00/01
Discharge Planning Unit (DPU) daysThe number of days the patient spent in the DPU unit85/86-94/95
PATIENT DIAGNOSIS
Diagnosis coding was done using ICD-9-CA codes until fiscal 2000/2001. From fiscal 2001/2002 onwards, diagnosis was coded using ICD-10-CA codes. There is a cross-over period in 2001/2002 with a small percentage of records still being coded using ICD-9-CA (and a fractional number in 2002/2003). The ‘Coding Classification Indicator’ field below indicates which system was used for the coding.
Diagnosis type [max of 16 for 91/92 – 00/01; 25 for 01/02 onward]A code which determines the relationship of the Diagnosis to the patient's hospitalization 
Coding classification indicatorA code which identifies the classification system used for recording diagnoses and procedures01/02
ICD-10-CA diagnosis coding
Diagnosis code (ICD-10-CA) [1-25]Indicates patient diagnosis, based on ICD-10-CA coding. Note: must be used with diagnosis type, above.01/02 onward
Diagnosis cluster  [1-25]Uses alphabetic characters to associate two or more diagnoses codes2009/2010
Diagnostic Short CodesA diagnostic grouping system based on the primary ICD-10-CA diagnostic code01/02 onward
Injury code (ICD-10-CA; S00 to T98)Identifies the first ICD-10-CA injury code on a record (if applicable) in the range S00 to T9801/02 onward
First ICD-10-CA E-Code (cause of injury)The first occurrence of an ICD-10-CA Diagnostic Code that is an E-code (i.e., indicating a cause of injury)01/02 onward
Place of injuryThe first occurrence of an ICD-10-CA diagnostic code indicating a place of injury01/02 onward
ICD-9-CA diagnosis coding  
Note: From 2001/02, barring a few exceptions indicated by the ‘Coding Classification indicator’ above, coding was done using ICD-10-CA coding. The fields for ICD-9-CA codes were converted back from the ICD-10-CA codes from 2001/02 until 2006/2007.
Diagnosis code (ICD-9) [1-16 fields for 91/92 – 00/01; 1-25 for 01/02-06/07]Indicates patient diagnosis, based on ICD-9 coding. Note: must be used with diagnosis type, above91/92 – 06/07
Diagnosis class codesGroups principal diagnoses (ICD-9) into broad sub-categories91/92 – 06/07
Diagnostic Short List (DSL) codesA diagnostic grouping system based on the primary ICD-9 diagnostic code90/91 – 06/07
Pre-admit co-morbidity (diagnosis 2)Indicates a condition arising at the beginning of the hospital's observation and/or treatment which influences the patient's length of stay and/or significantly influences the management/treatment of the patient while in hospital90/91 – 06/07
Injury code (ICD-9; 800-999)Identifies the first ICD-9 injury code on a record (if applicable) in the range 800-99991/92 – 06/07
First ICD-9 E-code (cause of injury)The first occurrence of an ICD-9 Diagnostic Code that is an E-code (i.e., indicating a cause of injury)91/92 – 06/07
Second ICD-9 E-code (cause of injury)The second occurrence of an ICD-9 Diagnostic Code that is an E-code (i.e., indicating a cause of injury)91/92 – 00/01
PATIENT SERVICE DATA
Procedure coding was done using Canadian Classification of Diagnostic, Therapeutic and Surgical Procedures (CCP) codes until fiscal 2000/2001. From fiscal 2001/2002 onwards, procedures were coded using Canadian Classification of Health (CCI) codes and referred to as ‘interventions’. There is a cross-over period in 2001/2002 with a small percentage of records still being coded using CCP (and a fractional number in 2002/2003). The ‘Coding Classification Indicator’ above (under patient diagnosis) indicates which system was used for the coding.
Procedure or intervention dates and times
Procedure on admission day flagAn intervention (not necessarily surgery) was performed on the day of admission91/92 onward
Procedure/intervention date [max of 12  fields for 85/86-00/01; 20 for 01/02 -08/09]The date on which the corresponding procedure or intervention was performed on the patient. Note: replaced by the fields below in 09/10.Up to 08/09
Intervention episode start date [1-20The date on which the intervention episode was begun09/10 onward
Intervention episode start time [1-20]The time at which the intervention episode was begun09/10 onward
Intervention episode end date [1-20The date on which the intervention episode ended09/10 onward
Intervention episode end time [1 -20]The time at which the intervention episode ended09/10 onward
Intervention episode duration [1-20]Length of time, in minutes, that it took to perform the associated intervention episode.09/10 onward
Intervention related (using CCI codes)
Intervention codes (CCI) [1-20]Indicate interventions that are performed during the patient's stay01/02 onward
Anaesthetic code [1-20]Indicates the type of anaesthesia used during an intervention01/02 onward
Intervention status attribute (CCI) [1-20]

Denotes the circumstances under which the intervention was performed (e.g., revision, abandoned after onset, delayed, staged, initial, routine)

01/02 onward
Intervention location attribute (CCI) [1-20]The anatomical location or laterality (e.g., right, left) of the intervention01/02 onward
Intervention extent attribute (CCI) [1-20]The quantitative measure related to the interventions01/02 onward
Intervention Short ListGroupings based on primary CCI codes01/02 onward
Intervention began pre-admission flag [1-20]Indicates if the intervention was started prior to admission09/10 onward
Intervention unplanned return to OR flag [1-20]Patient returned to OR for an unexpected subsequent intervention during the current hospitalization01/02 onward
Out of Hospital (OOH) intervention flag [1-20]Indicates whether the associated intervention was performed Out-Of-Hospital01/02 onward
Out of Hospital (OOH) intervention [1-20]Intervention (CCI) codes for OOH interventions01/02 onward
Out of Hospital (OOH) intervention Institution [1-20]Facility number where the OOH intervention was performed01/02 onward
Surgical case flagA flag to indicate surgical cases01/02 onward
Procedure related (CCP Codes)
Note: Until 2000/2001 all procedure coding was done using CCP coding From 2001/2002, barring a few exceptions indicated by the ‘Code Classification Indicator’ above, procedure coding was done using CCI coding The CPP codes were created by converting back from the CCI codes from 2001/02 until 2006/2007
Procedure codes (CPP) [max of 12  fields for 85/86-00/01; 20 for 01/02 -06/07]Indicate operative or non-operative procedures performed during the patient's hospital stay90/91-06/07
Anaesthetic code [1-12]Indicates the type of anaesthesia used during a procedure85/86-00/01
Operation group 1A grouping based on the first procedure code (CCP)90/91-06/07
Operation group 2A grouping based on the second procedure code (CCP)90/91-06/07
Operation group 3A grouping based on the third procedure code (CCP)90/91-06/07
Procedure Short ListA grouping based on CCP codes (replaced by Intervention Short List above which uses CCI coding)91/92-06/07
Converted Out of Hospital intervention [1-20]CCP Code converted from ‘OOH Intervention’ above01/02-06/07
Service provider related

Provider 1 (most responsible provider)
Replaced by project-specific identification number

Provider (fee-for-service physician, surgeon, dentist, oral surgeon, midwife or nurse practitioner) who was most responsible for the patient's care during hospitalization01/02 onward
Provider 1 (most responsible provider) serviceCode identifying the specialty or service of the most responsible provider based on the Provider Service Code list provided by CIHI. Note: not the same as registered specialty.

90/91 onward

Intervention provider 20 in 01/02 onward
Replaced by project-specific identification number

Identifies the provider associated with an intervention/procedure 
Intervention provider’s serviceIndicates the level of training or the specialty of the health care provider associated with an intervention01/02 onward

Intervention (procedure) anaesthetist 20 in 01/02 onward
Replaced by project-specific identification number

Identifies the anaesthetist associated with the performed procedure/intervention 
Patient treatment related  
Main patient serviceService most responsible for the care of the patient 
Patient service groupGrouping based on combination of the main patient service, patient’s age in years and the first procedure90/91-00/01
Operative / non-operative codeThis code indicates if a record contains single/multiple diagnosis with or without operative procedures99/00-00/01
Occupational therapyA flag to indicate whether the patient received occupational therapy85/86-00/01
Physiotherapy   A flag to indicate whether the patient received physiotherapy85/86-00/01
Speech therapy

A flag to indicate whether the patient received speech therapy

99/00-00/01
Respiratory therapy

A flag to indicate whether the patient received respiratory therapy

99/00-00/01
Ventilated hoursTotal number of ventilated hours09/10 onward
Ventilation indicatorIndicates when ventilated hours calculation may be incomplete09/10 onward
Tertiary code 1Indicates a specialized and complex service carried out in a hospital authorized to provide this service93/94-00/01
Tertiary code 2Indicates a tertiary service was carried out in a hospital which has not been officially authorized to have a tertiary unit yet is providing tertiary services93/94-00/01
CANADIAN INSTITUTE FOR HEALTH INFORMATION (CIHI) CASE MIX GROUPS )
In 2001/2002, coding in ICD-10-CA/CCI was initiated in BC. Since ICD-9/CCP and ICD-10-CA/CCI cannot be fully translated, a different mix of cases may be represented within each CMG before and after the switch to ICD-10-CA/CCI.
CIHI CMG with Complexity Grouper Variables/Day Procedure Groups
CIHI CMG methodologies categorize patients into statistically and clinically homogeneous groups based on the collection of clinical and administrative data. These are based on the ICD-9 coding system and apply to records from 1991/92 to 200/01.
CIHI Case Mix Group (CMG)Categorizes a group of ICD-9 codes or diagnoses that have an anticipated similar clinical course and resource requirements91/92-00/01
CIHI Major Clinical Category (MCC)This field is based on a list of major clinical categories relating to particular systems in the body. It is assigned on the basis of the Most Responsible Diagnosis.91/92-00/01
CIHI CMG age categoryCIHI age grouping Age can be a factor in assigning complexity values91/92-00/01
CIHI CMG complexity grade list indicatorThis code determines the grade list used and is based on the CMG91/92-00/01
CIHI CMG complexity/co-morbidity levelThe complexity level based on the CIHI CMG91/92-00/01
CIHI Expected Length of Stay (ELOS)ELOS is the expected acute length of stay in hospital for patients with the same CMG, age category, comorbidity level and intervention factors91/92-00/01
CIHI Resource Intensity Weighting (RIW) valueA CMG inpatient weighting value assigned to estimate the relative cost of resources used to pay for a patient's care during their hospital stay91/92-00/01
CIHI Resource Intensity Weighting (RIW) exclusion indicator/atypical codeThis code indicates the status of the RIW assignment91/92-00/01
CIHI Day Procedure Group (DPG)A classification system for day surgeries.91/92-00/01
CIHI Day Procedure Group (DPG) weightThe weighting value assigned to a day surgery record by the CIHI grouping methodology91/92-00/01

CIHI Procedure Used for CMG Assignment

Code which identifies the procedure, if any, that was used to determine the CMG assignment

99/00-00/01
CIHI CMG Plus (CMG+) Grouper Variables

CMG Plus is a refinement in the Case Mix Groups methodology and aggregates acute care inpatients with similar clinical and resource utilization characteristics. It is based on the ICD-10-CA coding system and applies to records from 2001/2002 onwards.

Each year CIHI uses a new methodology for creating these grouper variables. This methodology is then applied to the current year as well as historical years of data. The methodology is usually named by the year it is created for (e.g., 2008 methodology).

Methodology yearThis field represents the year for which the CIHI CMG Plus grouping methodology was developed01/02 onward
Major Clinical Category (MCC+)This field is based on a list of major clinical categories relating to particular systems in the body. It is assigned on the basis of the Most Responsible Diagnosis.01/02 onward
Case Mix Group (CMG+)Categorizes a group of ICD-10-CA codes or diagnoses that have an anticipated similar clinical course and resource requirements01/02 onward
CMG+ return codeReturn code from the CIHI CMG Complexity grouper for the CMGs01/02 onward
MCC partitionPartitions MCCs into intervention or diagnosis CMGs01/02 onward
Co-morbidity levelThe co-morbidity level based upon cumulative cost impact of comorbidities on the patient stay01/02 onward
CMG+ age categoryCIHI age grouping Age can be a factor in assigning complexity values01/02 onward
Flagged intervention countIndicates the number of flagged interventions01/02 onward
Intervention event countIndicates there was an intervention event01/02 onward
Intervention OOH countIndicates there was an OOH intervention06/07 onward
CMG+ interventionThe assigned CCI intervention code, if any, that was used to determine the CMG assignment01/02 onward
CMG+ intervention statusThe CCI intervention status attribute assigned to the corresponding intervention01/02 onward
CMG+ intervention locationThe CCI intervention location attribute  assigned to the corresponding intervention01/02 onward
CMG+ intervention extentThe CCI intervention extent attribute assigned to the corresponding intervention01/02 only
CMG+ intervention episodeThe episode number of the intervention used to determine the CMG assignment01/02 onward
Diagnosis used for CMG+ assignmentThe ICD-10-CA diagnosis code, if any, used for the CMG assignment01/02 onward
Inpatient Resource Intensity Weight (RIW)A CMG inpatient weighting value assigned to estimate the relative cost of resources used to pay for a patient's care during their hospital stay01/02 onward
Expected Length of Stay (ELOS) daysELOS is the average acute length of stay in hospital for patients with the same CMG, age category, comorbidity level and intervention factors01/02 onward
Inpatient RIW atypical codeIdentifies atypical cases that do not receive the normal or predicted course of treatment associated with inpatients in a specific CMG01/02 onward
Inpatient Resource Intensity LevelGroups Resource Intensity Factors into levels to indicate the overall effect of all factors on a particular case01/02 onward
DPG RIWDPG weighting value assigned to day surgery cases01/02 onward
CMG+ flagged intervention fields  
Co-morbidity Total FactorThe cumulative percentage increase on patient cost associated with all co-morbidity codes for a particular case01/02 onward
Inpatient Resource Intensity Total FactorThe measure of the effect of factors on the RIW of a case. The ratio of the RIW value calculated for a particular case and the RIW value for a Nonfactor case in the same CMG and Age Group.01/02 onward
Trim DaysFlagged Intervention Trim Days01/02 onward
Biopsy flagA flag to indicate biopsy intervention04/05 onward
Cardioversion flagA flag to indicate Cardioversion intervention01/02 onward
Cell saver flagA flag to indicate cell saver intervention01/02 onward
Chemotherapy flagA flag to indicate chemotherapy intervention01/02 onward
Dialysis flagA flag to indicate dialysis intervention01/02 onward
Endoscopy flagA flag to indicate endoscopy intervention04/05 onward
Feeding tube flagA flag to indicate feeding tube intervention01/02 onward
Heart resuscitation flagA flag to indicate heart resuscitation intervention01/02 onward
Mechanical ventilation greater than or equal to 96 hours flagA flag to indicate mechanical ventilation intervention (greater than or equal to 96 hours)01/02 onward
Mechanical ventilation less than 96 hours flagA flag to indicate mechanical ventilation intervention (less than or equal to 96 hours)01/02 onward
Parenteral nutrition flagA flag to indicate parenteral nutrition intervention01/02 onward
Paracentesis flagA flag to indicate paracentesis intervention01/02 onward
Pleurocentesis flagA flag to indicate pleurocentesis intervention01/02 onward
Pre-delivery days flagA flag to indicate pre-delivery days intervention04/05 onward
Radiotherapy flagA flag to indicate radiotherapy intervention01/02 onward
Tracheostomy flagA flag to indicate tracheostomy intervention01/02 onward
Vascular access device flagA flag to indicate vascular access device intervention01/02 onward
CIHI Day Procedure Group Plus (DPG+) codes
Day Procedure Group (DPG) is a national classification system for ambulatory hospital patients that focuses on the area of day surgery. Note that 2010 was the final year for DPG. As of 2011–2012, all ambulatory care is grouped using CACS (see below).
Day Procedure Group (DPG+ ) A procedure/intervention-based ambulatory classification system. Assigns (mostly) day surgery cases according to the principal (most significant) procedure/intervention recorded on the patient abstract.01/02-10/11
DPG+ grouper return codeIndicates whether DPG grouping was successful01/02-10/11
DPG+ RIWThe weighting value assigned to a day surgery case01/02-10/11
DPG+ assigned interventionThe CCI intervention code, if any, that was used to determine the DPG assignment04/05-10/11
DPG+ intervention locationThe CCI location attribute assigned to the corresponding intervention04/05-10/11
CACS assigned anaesthetic techniqueThe anesthetic technique, if any, in the intervention that was used to determine the CACS assignment06/07 onward
CACS codeIndicates the Comprehensive Ambulatory Care Classification System (CACS) code06/07 onward
CACS investigative technology countTotal count of investigative technologies used to derive CACS codes06/07 onward
CACS Major Ambulatory Cluster (MAC)Indicates CACS Major Ambulatory Cluster codes06/07 onward
CACS partitionA sub-division (i.e., diagnosis or intervention partitions) of the Major Ambulatory Cluster06/07 onward
CACS Resource Intensity Weight (RIW)Indicates the ambulatory weighting value assigned to the case06/07 onward
NEWBORN/MATERNAL DATA
This section contains data related to births in BC hospitals. In the case of an adoption the mother would be the birth mother. Babies born out of province or at home are not included here.
Infant birth weightThe weight of the infant in grams (newborns and neonates only)85/86 onward
Gestational ageThe number of weeks of gestation for a newborn. This field was replaced with the 3 fields below in 07/08.94/95-06/07
Clinical gestational weeks at admissionClinical gestation weeks upon admission. Not applicable for newborns and neonates cases07/08 onward
Clinical gestational weeks at deliveryClinical gestation weeks at delivery. Applicable to delivered and newborn cases only.07/08 onward
Clinical gestational weeks at dischargeClinical gestation weeks at discharge. Not applicable for delivered, TA, newborns and neonates cases.07/08 onward
Neonatal Intensive Care Nursing Unit (NICU) days The number of days spent in the Neonatal Intensive Care Nursing Unit01/02 onward
Neonatal Intensive Care Nursing Unit (NICU) Level 1 daysThe number of days spent in a Level 1 NICU11/12
Neonatal Intensive Care Nursing Unit (NICU) Level 2 daysThe number of days spent in a Level 2 NICU93/94 onward
Neonatal Intensive Care Nursing Unit (NICU) Level 3 daysThe number of days spent in a Level 3 NICU93/94 onward

Mother listed on newborn record 97/98 onward
Replaced by project-specific identification number

A number used to identify the mother on a newborn's (under age 1) record 
MENTAL HEALTH (MH) INVOLUNTARY ADMISSIONS
These fields are flags indicating that the patient has been admitted involuntarily based on mental health issues. The flags indicate which forms were used to admit the patient. See https://wwwhealthgovbcca/exforms/mhhtml for current mental health act forms including involuntary admission forms
MH involuntary admission flagThis flag is set if any of MH project fields 1-5, below are set01/02 onward
MH Project field 1 flagMH involuntary admission form 4 is on the patient’s record01/02 onward
MH Project field 2 flagPatient was apprehended and admitted by police01/02 onward
MH Project field 3 flagMH involuntary admission form 21 (recalled from extended leave) is on the patient’s record01/02 onward
MH Project field 4 flagMH involuntary admission form 10 (warrant) is on the patient’s record01/02 onward
MH Project field 5 flagMH involuntary admission form 20 (placed on extended leave) is on the patient’s record01/02 onward
MH Project field 6 flagMH involuntary admission form 37 is on the patient’s record01/02-06/07
MH Project field 7 flagMH involuntary admission form 42 is on the patient’s record01/02-06/07

 


Page last revised: May 21, 2015