QRI - Query Response Instance Segment

The QRI segment is used to indicate the weight match for a returned record (where the responding system employs a numeric algorithm) and/or the match reason code (where the responding system uses rules or other match options).

Examples of the use of this segment appear in Chapter 3, "Patient Administration," section 3.3.57, "Find Candidates and Response."

HL7 Attribute Table - QRI - query response instance segment

Seq#	Data Element Name	DataType	Usage	Vocabulary	Cardinality	Item #	Length	C.LEN	Flags
QRI
1	Candidate Confidence	NM	O		[0..1]	01436		10	#
2	Match Reason Code	CWE	O	0392 Match Reason	[0..*]	01437	[2..2]
3	Algorithm Descriptor	CWE	O	0393 Match Algorithms	[0..1]	01438

QRI-1: Candidate Confidence (NM) 01436

Definition: This field contains a numeric value indicating the match weight or confidence level associated with the record.

Example: |0.88| or |12.32|

One use of this optional field is in Patient Look-up transactions where the searching system employs a numeric algorithm for determining potential matches to patient/person look-ups.

QRI-2: Match Reason Code (CWE) 01437

Definition: This field contains a coded value indicating what search components (e.g., name, birth date, social security number) of the record returned matched the original query where the responding system does not assign numeric match weights or confidence levels. In short, it provides a method for passing a descriptive indication of why a particular record was found.

.Refer to User-defined Table 0392 – Match reason in Chapter 2C, Code Tables, for suggested values.

QRI-3: Algorithm Descriptor (CWE) 01438

Definition: This field contains a text value indicating the name or identity of the specific search algorithm to which the RCP-5 Search confidence threshold and the QRI-1 Candidate confidence refer. Note that there are sometimes significant differences among the algorithms in their numeric scales (e.g., one is 0-100, another might be 10 – 20) as well as their meanings of the same value (two algorithms with an 80% match might not return the same records). Refer to User-defined Table 0393 – Match algorithms in Chapter 2C, Code Tables, for suggested values.

Example: |MATCHWARE_1.2^^HL70393| or |LINKSOFT_2.01^^HL70393|

One use of this optional field is in Patient Look-up transactions where the searching system employs a numeric algorithm for determining potential matches to patient/person look-ups.