Concept: Hepatitis B - Method of Identification

 Printer friendly

Concept Description

Last Updated: 2013-07-17

Introduction
    This concept provides a working definition of hepatitis B, describes the method used at MCHP to investigate hepatitis B in the administrative data held in the Manitoba Population Research Data Repository, and lists the codes that are used in laboratory tests to investigate its presence in the population.
Definition of Hepatitis B
MCHP Hepatitis B Algorithms
    The following method has been used at MCHP to determine testing and to identify individuals with hepatitis B.
1. Brownell et al. (2012)
Table 1 - Hepatitis B: Serology Section
    STARTDT 1 STOPDT 2 AUXCD5 DESCR40
    01/01/90 03/18/02 AHBCG ANTIBODY TO HEPATITIS B CORE IGG
    01/01/90 01/01/99 AHBCM ANTIBODY TO HEPATITIS B CORE IGM
    03/18/02 01/01/99 AHBCT ANTIBODY TO HEP. B CORE ANTIGEN (TOTAL)
    01/01/90 01/01/99 AHBEA HEPATITIS B "E" ANTIBODY
    01/01/90 01/01/99 AHBS ANTIBODY TO HEPATITIS B SURFACE ANTIGEN
    01/01/90 01/01/99 HBEG HEPATITIS B "E" ANTIGEN
    01/01/90 01/01/99 HBSAG HEPATITIS B SURFACE ANTIGEN
    11/28/94 01/01/99 HBVD HEPATITIS B DNA
    07/20/07 01/01/99 HBVGT HEPATITIS B VIRUS GENOTYPING
    11/13/01 04/01/09 HBVL HEPATITIS B VIRAL LOAD
    07/15/94 01/01/99 HBVN HBSAG CONFIRMATION
    04/01/09 01/01/99 HBVVL HEPATITIS B VIRAL LOAD
    05/11/92 05/01/06 HPAHB ANTIBODY TO HEPATITIS B SURFACE ANTIGEN
    01/01/90 01/01/99 HPHBS HEPATITIS B SURFACE ANTIGEN


    1 - The date that the code was created in the file.
    2 - The date that the code became inactive. Codes with stop dates recorded as "01/01/99" are still active as this is a default system date.

In the deliverable Long-Term Outcomes Of Manitoba's Insight Mentoring Program: A Comparative Statistical Analysis by Ruth et al. (2015), the same set of code values listed above were used to identify hepatitis B serology testing in first trimester.
Limitations /Cautious
  • A value of P [Positive] to identify a positive test result in the POSNEG field [Positive-Negative] for specific AUXCD5 codes in the Cadham Provincial Laboratory (CPL) data was used to determine a positive test result.

  • The AUXCD codes used to identify hepatitis B in the Serology Section should be verified at the beginning of each new study to ensure that the list of codes from the CPL data is up-to-date.

Related concepts 

Related terms 

Links 

References 

  • Brownell M, Chartier M, Santos R, Ekuma O, Au W, Sarkar J, MacWilliam L, Burland E, Koseva I, Guenette W. How are Manitoba's Children Doing? Winnipeg, MB: Manitoba Centre for Health Policy, 2012. [Summary] [Full Report] [Data extras] [Errata] (View)
  • Lix L, Smith M, Azimaee M, Dahl M, Nicol P, Burchill C, Burland E, Goh C, Schultz J, Bailly A. A Systematic Investigation of Manitoba's Provincial Laboratory Data. Winnipeg, MB: Manitoba Centre for Health Policy, 2012. [Summary] [Full Report] (View)
  • Ruth C, Brownell M, Isbister J, MacWilliam L, Gammon H, Singal D, Soodeen R, McGowan K, Kulbaba C, Boriskewich E. Long-Term Outcomes Of Manitoba's Insight Mentoring Program: A Comparative Statistical Analysis . Winnipeg, MB: Manitoba Centre for Health Policy, 2015. [Summary] [Full Report] (View)