Peer Groups in the Electronic Discharge Abstract Database Reports

The electronic Discharge Abstract Database (eDAD) Reports provide users with 3 ways of selecting peer institutions, including:

  1. The Canadian Hospital Reporting Project (CHRP) Standard peer groups 
  2. The Comparative Hospital Activity Program (CHAP) peer groups
  3. User-defined peer groups (users can select institutions for comparison) 

The peer group attribute is displayed in the page-by section of the eDAD reports.

Note: The only peer group selections in the eDAD Quick reports are the CHRP standard peer groups. Users can select the CHAP or CHRP peer groups or define their own peer groups from the eDAD Custom reports prompt page.

1. CHRP Peer Groups

CHRP is a new national quality improvement initiative from the Canadian Institute for Health Information (CIHI). Through CHRP, for the first time health care providers and system decision‐makers have access to a standard set of pan‐Canadian clinical and financial indicators to measure quality and efficiency in Canadian acute care institutions.

To identify similar institutions across the country, CHRP provides a profile for each participating institution. Based on the profile, institutions are assigned to a standard peer group. Users can use one of four standard peer groups for comparison or create their own custom peer group by consulting the profiles. The four standard CHRP peer groups are: 

  • T (Teaching)
  • H1 (Larger Community Hospital)
  • H2 (Medium Community Hospital)
  • H3 (Smaller Community Hospital)

Teaching hospitals are defined as hospitals with full membership in the Association of Canadian Academic Healthcare Organizations (ACAHO).

Non-teaching hospitals are allocated to larger, medium or smaller community hospital peer groups based on their volumes using inpatient cases, total weighted cases and inpatient days.

Note:  Some institutions that participate in eDAD may not participate in CHRP as CHRP includes acute and day surgery institutions based on the Analytical Institution Type instead of Institution Type. The Analytical Institution Type Code was introduced to the DAD in 2004–2005 to minimize the impact of the differences between level-of-care definitions across provinces/territories and to facilitate comparative reporting across Canada. It is assigned when the Institution Type is known to differ from the type of care provided by an institution.

More information about CHRP can be accessed via the eDAD Home Page, left-side menu bar.

2. eCHAP (now called eDAD) Peer Groups

The electronic Comparison of Hospital Activity Program (eCHAP) reports were developed to assist facilities in making sound utilization and management decisions. eCHAP provides comparative information from participating facilities using nationally consistent variables. The eCHAP tool is being replaced by eDAD reports. However, the CHAP peer group methodology will still be available in eDAD reports.

The CHAP peer groups are reported by institutions in the DAD Institution File. DAD acute and day surgery institutions that participate in eDAD are assigned to one of the following CHAP peer groups based on the number of beds, or teaching/paediatric designated status as identified by the facility:

Peer group 0 - (1-49 beds)

Peer group 1 - (50-99 beds)

Peer group 2 - (100-199 beds)

Peer group 3 - (200-399 beds)

Peer group 4 - (400+ beds, Non Teaching)

Peer group 5 - (Teaching)

Peer group 6 - (Paediatric)

Analysis shows that there is a large agreement between CHAP and CHRP peer groups. For example, for fiscal year 2009-2010, 94% of the institutions that recorded a CHAP peer group 0 (1-49 beds) in their DAD institution file and participated in CHRP were assigned to CHRP peer group ‘H3 – Community – Small’ and 6% to CHRP peer group ‘H3 – Community – Medium’.

Institutions that participate in eDAD but do not participate in CHRP will be mapped to a CHRP peer group as per the table below. There are usually about nine institution numbers  that are mapped to a CHRP peer group, excluding those mapped to CHRP peer group ‘-7’ (Not applicable).

CHAP Peer Group

CHRP Peer Group

0- (1-49 beds)


1- (50-99 beds)


2- (100-199 beds)


3- (200-399 beds)


4- (400+ beds, Non Teaching)


5- (Teaching)


6- (Paediatric)


-7 (Not available)

-7 ( Not applicable)



-          Institutions that participate in eDAD that did not record a CHAP peer group in their DAD institution file will be assigned the CHAP peer group ‘-7’ (Not available). If the institution does not participate in CHRP it will be assigned the CHRP peer group ‘-7’ (Not applicable).  If the institution participates in CHRP, it will have a CHRP peer group as assigned by CHRP.

-          There are usually about 20 institution numbers with missing CHAP peer groups.

3. User-defined Peer Groups

Users can select institutions numbers for comparison using the Select Institutions prompt on the eDAD Custom reports prompt page.