Discharge Abstracts Database (Hospital Separations file)

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

Data Source: BC Ministry of Health


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 size Groups hospitals according to their bed capacity 90/91-00/01
Institution number for Out of Province (OOP) facilities Institution numbers for out of province facilities unique to each province/territory. Note coding changes in 2000. 91/92 onward
Private hospital number A facility identifier for British Columbia (BC) private clinics 03/04 onward
Province code (location of hospital) The province or territory of patient hospitalization 91/92 onward
Resident indicator Denotes whether the patient is a British Columbia (BC) resident or from out of province 90/91-00/01
Province issuing Health Care Number (HCN) Denotes the province (or territory) issuing the patient HCN 91/92 onward
Responsibility for payment Indicated the party responsible for a patient's hospitalization payment (coding changes in 2001/02)  
Third party liability form Indicates 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 care Indicated the level of care provided to the patient (e.g., Acute Care, Day Surgery)  
Admission date The 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 release The 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 category Indicated the urgency of admission (e.g., elective, emergency). Coding of this field changes in 2001/02.  
Entry code Indicates the patient’s type or mode of entry to a facility 90/91-onward
Readmission code Denotes 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 date Indicates the calendar date that the patient was registered in the Emergency Department 10/11-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 Department 10/11-onward
Ambulance code The type of ambulance that brought a patient to hospital 90/00-00/01
Ambulance flag A 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) codes 85/06-00/01
BC care level transferred from BC transfer level codes indicating the care level transferred from 01/02 onward
DISCHARGE RELATED
Discharge (separation) date The 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) date Indicates the date the patient was discharged from the Emergency Room (ER) to an inpatient unit 11/12-onward
Left Emergency Room (ER) time Indicates the time the patient was discharged from the ER to an inpatient unit 11/12-onward
Exit and Death codes
Discharge (separation) disposition The status of the patient upon leaving the hospital (includes death status) 01/02 onward
Exit code Indicates the type of discharge from the hospital 85/86–00/01
Death code Indicates 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
Autopsy A flag to indicate if an autopsy was performed 91/92- 00/01
Coroner Indicates if a coroner/medical examiner was involved following a patient death 91/92-00/01
Death in Operating Room (OR) indicator A 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 code Identifies type of patient death, other than an operative death

91/92-00/01

Death in Special Care Unit (SCU) indicator A flag to indicate death in a Special Care Unit 01/02 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) codes 85/86-00/01
BC care level transferred to BC transfer level codes indicating the level of care a patient was transferred to 01/02 onward
Long Term Care (LTC) assessment code Indicates the last level of LTC assessment for patients occupying acute care beds 85/86-95/96
Long term care assessment for Discharge Planning Unit (DPU) code Indicates the last level of LTC assessment for DPU patients only 85/86-95/96
Ventilated on discharge flag Indicates that patient was ventilated on discharge from the reporting facility 09/10-12/13
LENGTH OF STAY INDICATORS
Total length of stay The total number of days the patient was hospitalized from admission to discharge 90/91 onward
Length of stay (group 1) Groups of the total number of days from admission to discharge into 21 divisions 90/91-06/07
Length of stay (group 2) Groups of the total number of days from admission to discharge into 12 divisions 90/91-06/07
Stay by level of care/services
Alternate Level of Care (ALC) days The 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 days The number of days spent in Acute and Rehab levels only 91/92 onward
Rehabilitation days  The number of days a patient spent in the rehabilitation care unit in an Acute Care Hospital 85/86 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 service 90/91 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 stay 90/91 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 stay 85/86 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 days Captures all unknown Special Care Unit days so that the total of all Special Care Unit days equals total ICU days 01/02 onward
Medical ICU days  The number of days spent in a Medical Intensive Care Nursing Unit 01/02 onward
Surgical ICU days The number of days spent in a Surgical Intensive Care Nursing Unit 01/02 onward
Combined Medical/Surgical ICU days The number of days spent in combined Medical/Surgical Intensive Care Nursing Unit 01/02 onward
Neurosurgery ICU days The number of days spent in a Neurosurgery Intensive Care Nursing Unit 01/02 onward
Paediatric ICU days The number of days spent in a Pediatric Intensive Care Nursing Unit 01/02 onward
Respirology ICU days The number of days spent in Respirology Intensive Care Nursing Unit 01/02-02/03
Burn ICU days The number of days spent in a Burn Intensive Care Nursing Unit 02/03 onward
Cardiac ICU days The number of days spent in a Cardiac Intensive Care Nursing Unit 01/02 onward
Trauma ICU days The number of days spent in the Trauma Intensive Care Nursing Unit 01/02 onward
Coronary Care Unit days The number of days spent in the Coronary Intensive Care Nursing Unit  
Step-down Medical Unit days The number of days spent in the Step-Down Medical Unit 01/02 onward
Step-down Surgical Unit days The number of days spent in the Step-Down Surgical Unit 01/02 onward
Combined Medical/Surgical Step Down Unit days The number of days spent in the Combined Medical/Surgical Step Down Unit 09/10 onward
Chronic Behaviour Disorder (CBD) Unit days The number of days associated with a CBD Unit 85/86-00/01
Discharge Planning Unit (DPU) days The number of days the patient spent in the DPU unit 85/86-94/95
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 indicator A code which identifies the classification system used for recording diagnoses and procedures 01/02
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 codes 2009/2010
Diagnostic Short Codes A diagnostic grouping system based on the primary ICD-10-CA diagnostic code 01/02 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 T98 01/02 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 injury The first occurrence of an ICD-10-CA diagnostic code indicating a place of injury 01/02 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, above 91/92 – 06/07
Diagnosis class codes Groups principal diagnoses (ICD-9) into broad sub-categories 91/92 – 06/07
Diagnostic Short List (DSL) codes A diagnostic grouping system based on the primary ICD-9 diagnostic code 90/91 – 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 hospital 90/91 – 06/07
Injury code (ICD-9; 800-999) Identifies the first ICD-9 injury code on a record (if applicable) in the range 800-999 91/92 – 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 flag An intervention (not necessarily surgery) was performed on the day of admission 91/92 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 [1-20 The date on which the intervention episode was begun 09/10 onward
Intervention episode start time [1-20] The time at which the intervention episode was begun 09/10 onward
Intervention episode end date [1-20 The date on which the intervention episode ended 09/10 onward
Intervention episode end time [1 -20] The time at which the intervention episode ended 09/10 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 stay 01/02 onward
Anaesthetic code [1-20] Indicates the type of anaesthesia used during an intervention 01/02 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 intervention 01/02 onward
Intervention extent attribute (CCI) [1-20] The quantitative measure related to the interventions 01/02 onward
Intervention Short List Groupings based on primary CCI codes 01/02 onward
Intervention began pre-admission flag [1-20] Indicates if the intervention was started prior to admission 09/10 onward
Intervention unplanned return to OR flag [1-20] Patient returned to OR for an unexpected subsequent intervention during the current hospitalization 01/02 onward
Out of Hospital (OOH) intervention flag [1-20] Indicates whether the associated intervention was performed Out-Of-Hospital 01/02 onward
Out of Hospital (OOH) intervention [1-20] Intervention (CCI) codes for OOH interventions 01/02 onward
Out of Hospital (OOH) intervention Institution [1-20] Facility number where the OOH intervention was performed 01/02 onward
Surgical case flag A flag to indicate surgical cases 01/02 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 stay 90/91-06/07
Anaesthetic code [1-12] Indicates the type of anaesthesia used during a procedure 85/86-00/01
Operation group 1 A grouping based on the first procedure code (CCP) 90/91-06/07
Operation group 2 A grouping based on the second procedure code (CCP) 90/91-06/07
Operation group 3 A grouping based on the third procedure code (CCP) 90/91-06/07
Procedure Short List A 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’ above 01/02-06/07
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 hospitalization 01/02 onward
Provider 1 (most responsible provider) service Code 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 service Indicates the level of training or the specialty of the health care provider associated with an intervention 01/02 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 service Service most responsible for the care of the patient  
Patient service group Grouping based on combination of the main patient service, patient’s age in years and the first procedure 90/91-00/01
Operative / non-operative code This code indicates if a record contains single/multiple diagnosis with or without operative procedures 99/00-00/01
Occupational therapy A flag to indicate whether the patient received occupational therapy 85/86-00/01
Physiotherapy    A flag to indicate whether the patient received physiotherapy 85/86-00/01
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 hours Total number of ventilated hours 09/10 onward
Ventilation indicator Indicates when ventilated hours calculation may be incomplete 09/10 onward
Tertiary code 1 Indicates a specialized and complex service carried out in a hospital authorized to provide this service 93/94-00/01
Tertiary code 2 Indicates a tertiary service was carried out in a hospital which has not been officially authorized to have a tertiary unit yet is providing tertiary services 93/94-00/01
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 requirements 91/92-00/01
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 category CIHI age grouping Age can be a factor in assigning complexity values 91/92-00/01
CIHI CMG complexity grade list indicator This code determines the grade list used and is based on the CMG 91/92-00/01
CIHI CMG complexity/co-morbidity level The complexity level based on the CIHI CMG 91/92-00/01
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 factors 91/92-00/01
CIHI Resource Intensity Weighting (RIW) value A CMG inpatient weighting value assigned to estimate the relative cost of resources used to pay for a patient's care during their hospital stay 91/92-00/01
CIHI Resource Intensity Weighting (RIW) exclusion indicator/atypical code This code indicates the status of the RIW assignment 91/92-00/01
CIHI Day Procedure Group (DPG) A classification system for day surgeries. 91/92-00/01
CIHI Day Procedure Group (DPG) weight The weighting value assigned to a day surgery record by the CIHI grouping methodology 91/92-00/01

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 year This field represents the year for which the CIHI CMG Plus grouping methodology was developed 01/02 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 requirements 01/02 onward
CMG+ return code Return code from the CIHI CMG Complexity grouper for the CMGs 01/02 onward
MCC partition Partitions MCCs into intervention or diagnosis CMGs 01/02 onward
Co-morbidity level The co-morbidity level based upon cumulative cost impact of comorbidities on the patient stay 01/02 onward
CMG+ age category CIHI age grouping Age can be a factor in assigning complexity values 01/02 onward
Flagged intervention count Indicates the number of flagged interventions 01/02 onward
Intervention event count Indicates there was an intervention event 01/02 onward
Intervention OOH count Indicates there was an OOH intervention 06/07 onward
CMG+ intervention The assigned CCI intervention code, if any, that was used to determine the CMG assignment 01/02 onward
CMG+ intervention status The CCI intervention status attribute assigned to the corresponding intervention 01/02 onward
CMG+ intervention location The CCI intervention location attribute  assigned to the corresponding intervention 01/02 onward
CMG+ intervention extent The CCI intervention extent attribute assigned to the corresponding intervention 01/02 only
CMG+ intervention episode The episode number of the intervention used to determine the CMG assignment 01/02 onward
Diagnosis used for CMG+ assignment The ICD-10-CA diagnosis code, if any, used for the CMG assignment 01/02 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 stay 01/02 onward
Expected Length of Stay (ELOS) days ELOS is the average acute length of stay in hospital for patients with the same CMG, age category, comorbidity level and intervention factors 01/02 onward
Inpatient RIW atypical code Identifies atypical cases that do not receive the normal or predicted course of treatment associated with inpatients in a specific CMG 01/02 onward
Inpatient Resource Intensity Level Groups Resource Intensity Factors into levels to indicate the overall effect of all factors on a particular case 01/02 onward
DPG RIW DPG weighting value assigned to day surgery cases 01/02 onward
CMG+ flagged intervention fields    
Co-morbidity Total Factor The cumulative percentage increase on patient cost associated with all co-morbidity codes for a particular case 01/02 onward
Inpatient Resource Intensity Total Factor The 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 Days Flagged Intervention Trim Days 01/02 onward
Biopsy flag A flag to indicate biopsy intervention 04/05 onward
Cardioversion flag A flag to indicate Cardioversion intervention 01/02 onward
Cell saver flag A flag to indicate cell saver intervention 01/02 onward
Chemotherapy flag A flag to indicate chemotherapy intervention 01/02 onward
Dialysis flag A flag to indicate dialysis intervention 01/02 onward
Endoscopy flag A flag to indicate endoscopy intervention 04/05 onward
Feeding tube flag A flag to indicate feeding tube intervention 01/02 onward
Heart resuscitation flag A flag to indicate heart resuscitation intervention 01/02 onward
Mechanical ventilation greater than or equal to 96 hours flag A flag to indicate mechanical ventilation intervention (greater than or equal to 96 hours) 01/02 onward
Mechanical ventilation less than 96 hours flag A flag to indicate mechanical ventilation intervention (less than or equal to 96 hours) 01/02 onward
Parenteral nutrition flag A flag to indicate parenteral nutrition intervention 01/02 onward
Paracentesis flag A flag to indicate paracentesis intervention 01/02 onward
Pleurocentesis flag A flag to indicate pleurocentesis intervention 01/02 onward
Pre-delivery days flag A flag to indicate pre-delivery days intervention 04/05 onward
Radiotherapy flag A flag to indicate radiotherapy intervention 01/02 onward
Tracheostomy flag A flag to indicate tracheostomy intervention 01/02 onward
Vascular access device flag A flag to indicate vascular access device intervention 01/02 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 code Indicates whether DPG grouping was successful 01/02-10/11
DPG+ RIW The weighting value assigned to a day surgery case 01/02-10/11
DPG+ assigned intervention The CCI intervention code, if any, that was used to determine the DPG assignment 04/05-10/11
DPG+ intervention location The CCI location attribute assigned to the corresponding intervention 04/05-10/11
CACS assigned anaesthetic technique The anesthetic technique, if any, in the intervention that was used to determine the CACS assignment 06/07 onward
CACS code Indicates the Comprehensive Ambulatory Care Classification System (CACS) code 06/07 onward
CACS investigative technology count Total count of investigative technologies used to derive CACS codes 06/07 onward
CACS Major Ambulatory Cluster (MAC) Indicates CACS Major Ambulatory Cluster codes 06/07 onward
CACS partition A sub-division (i.e., diagnosis or intervention partitions) of the Major Ambulatory Cluster 06/07 onward
CACS Resource Intensity Weight (RIW) Indicates the ambulatory weighting value assigned to the case 06/07 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 weight The weight of the infant in grams (newborns and neonates only) 85/86 onward
Gestational age The 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 admission Clinical gestation weeks upon admission. Not applicable for newborns and neonates cases 07/08 onward
Clinical gestational weeks at delivery Clinical gestation weeks at delivery. Applicable to delivered and newborn cases only. 07/08 onward
Clinical gestational weeks at discharge Clinical 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 Unit 01/02 onward
Neonatal Intensive Care Nursing Unit (NICU) Level 1 days The number of days spent in a Level 1 NICU 11/12
Neonatal Intensive Care Nursing Unit (NICU) Level 2 days The number of days spent in a Level 2 NICU 93/94 onward
Neonatal Intensive Care Nursing Unit (NICU) Level 3 days The number of days spent in a Level 3 NICU 93/94 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 flag This flag is set if any of MH project fields 1-5, below are set 01/02 onward
MH Project field 1 flag MH involuntary admission form 4 is on the patient’s record 01/02 onward
MH Project field 2 flag Patient was apprehended and admitted by police 01/02 onward
MH Project field 3 flag MH involuntary admission form 21 (recalled from extended leave) is on the patient’s record 01/02 onward
MH Project field 4 flag MH involuntary admission form 10 (warrant) is on the patient’s record 01/02 onward
MH Project field 5 flag MH involuntary admission form 20 (placed on extended leave) is on the patient’s record 01/02 onward
MH Project field 6 flag MH involuntary admission form 37 is on the patient’s record 01/02-06/07
MH Project field 7 flag MH involuntary admission form 42 is on the patient’s record 01/02-06/07

 


Page last revised: October 14, 2015