Preliminary study of Mapping LOINC codes with Thai local codes.

1. Thai Health Informatics Academy
T h a i H e a l t h I n f o r m a t i o n S t a n d a r d D e v e l o p m e n t C e n t e r ( TH I S )
MAPPING THAI LOCAL
LABORATORY CODES WITH LOINC :
THE PRELIMINARY REPORT
WANCHANA PONTONGMAK
Dr. BOONCHAI KIJSANAYOTIN

2. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Outline
 Background & Rational
 LOINC
 Objective
 Materials & Method
 Result
 Conclusions & Discussions

3. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Background & Rational
 Health data standard facilitated sharing and
exchanging health data with semantic interoperability
 Thailand does not have standards for clinical
laboratory tests

4. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Background & Rational
 Thai healthcare service will adopt LOINC as the
national laboratory standard
 Suitability of LOINC for Thai healthcare service
indicated by mapping local tests with LOINC

5. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
What is LOINC ?
 Logical Observation Identifiers names and codes
(LOINC) is a unique identifier for medical laboratory
and clinical observations
• LOINC contains 70,689 terms
• LOINC is broadly used in many countries

6. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
What does LOINC look like?
 Serial code 1-5 digit and 1 check digit
 The name consist of 6 axes
<component>:<property>:<time>:<sample>:<scale>:<method>
20509-6 Hemoglobin : MCnc : Pt : Bld : Qn : Calculated
 Long name Hemoglobin [Mass/​volume] in Blood by calculation

7. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Objective
 This study aims to study the coverage of LOINC
terms with Thai local laboratory terms

8. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Research Concept &
Expected Results
 Mapping LOINC with local laboratory tests to study
the coverage of LOINC for Thai local laboratory tests
in order to support decision making by policy maker

9. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Materials & Method
 Local laboratory test form
1. Thai Comptroller General’s Department’s
reimbursement codes list.
3 selected groups form 16 reimbursement groups (721 terms)
 Laboratory tests (498 terms)
 Radiology tests (182 terms)
 Special tests (41 terms)

10. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Materials & Method
2. Burirum province’s Laboratory information
system’s code list. (732 terms)
 Laboratory tests (596 terms)
 X-ray tests (136 terms)

11. Thai Health Informatics Academy
Thai Health Information Standard Development Center(THIS)
- Available at www.loinc.org
• LOINC database and RELMA
Materials & Method

12. Thai Health Informatics Academy
Thai Health Information Standard Development Center(THIS)
Materials & Method

13. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Materials & Method
 Importing local terms to RELMA
 Text tab delimited file
 Verifying unreadable terms
 Non-generic name
 Inaccurate data entry
 Local name

14. Thai Health Informatics Academy
Thai Health Information Standard Development Center(THIS)
 Mapping
 RELMA
 Algorithm
Materials & Method

15. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Mapping type
Local LOINC
Local test LOINC name
code codes
199 VCT 3183-1 Clotting time : Time : Pt : Bld : Qn : Lee White
20570-8 Hematocrit : VFr : Pt : Bld : Qn
4544-3 Hematocrit : VFr : Pt : Bld : Qn : Automated
48703-3 Hematocrit : VFr : Pt : Bld : Qn : Estimated
31100-1 Hematocrit : VFr : Pt : Bld : Qn : Impedance
264 Hct
4545-0 Hematocrit : VFr : Pt : Bld : Qn : Spun
32354-3 Hematocrit : VFr : Pt : BldA : Qn
42908-4 Hematocrit : VFr : Pt : BldC : Qn
41654-5 Hematocrit : VFr : Pt : BldV : Qn
310 จอง / เตรี ยมผ่าตัด

16. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Result
 More than 80% could be mapped to LOINC, of
which 23.58% are 1-1 and 63.07% are 1-Many
Mapping type Thai’s CGD Burirum’s LIS
N % N %
1-1 117 16.23 221 30.19
1-Many 467 64.77 395 53.96
Unmapped 137 19.00 116 15.85
total 721 100.00 732 100.00

17. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Conclusions & Discussions
 One to many results
 LOINC has higher level of granularity than local tests
 6 axes of LOINC
 Local code has 1-2 important axis

18. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Conclusions & Discussions
 Unmapped results
 Non-generic and Local names
 Not part of laboratory tests
 Not scope of LOINC
1. The instrument used in testing
2. Fine details about the sample or the site of collection
(e.g., upper right plural)
3. Who verified the result
4. The size of the sample collected
5. The place of testing (e.g., home, bedside, clinical lab)

19. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Conclusions & Discussions
• Limitation of mapper knowledge domain
 Laboratory experts knowledge could increase
accuracy mapping results

20. Thai Health Information Standard Development Center(THIS)
Thai Health Informatics Academy
Conclusions & Discussions
 More than 80% mapping result indicate LOINC is
applicable to Thai healthcare service
 High number of 1-Many indicate LOINC has higher
details than local tests

21. Thai Health Informatics Academy
Thai Health Information Standard Development Center(THIS)

22. Thai Health Informatics Academy
Thai Health Information Standard Development Center(THIS)