/**
* Library: HIV.IND.38 Logic
* Ref No: VER.2
* Short Name: Early infant diagnosis (EID) coverage
*
* Definition: % of HIV-exposed infants who receive a virological test for HIV within two months (and 12 months) of birth
*
* Numerator: Number of HIV-exposed infants born during the reporting period who received a virological HIV test within two months (and 12 months) of birth
* Numerator Calculation: COUNT of infants who are an "HIV-exposed infant or child" with "Infant date of birth" within the reporting period AND with "Date of viral load sample collection" LESS THAN 2 months AFTER "Infant date of birth" AND "HIV test type"='Nucleic acid test for HIV'
* Numerator Exclusions:
*
* Denominator: Estimated number of HIV-positive women who delivered during the reporting period. | | Note: The denominator is a proxy measure for the number of infants born to HIV-infected women.
* Denominator Calculation: *Estimated number of HIV-positive women who delivered during the reporting period
* Denominator Exclusions:
*
* Disaggregations:
* • Test result (HIV-positive, HIV-negative, indeterminate, other) to enable calculation of the percentage positive and the percentage with an indeterminate result among HIV-exposed infants receiving a virological test
* • Age of infant (<2 months, 2-12 months) to allow the separate calculation of the proportion of exposed infants receiving virological testing within two months of birth and within 12 months of birth
* • Cities and other administrative regions of epidemiologic importance
*
* Disaggregation Elements: HIV test date (at 2 months, at 12 months) | Age of infant (<2 months, 2-12 months)
*
* Numerator and Denominator Elements:
* Date of viral load sample collection
* HIV test type
* HIV-exposed infant or child
* Infant date of birth
*
* Reference: Consolidated guidelines on person-centred HIV strategic information: strengthening routine data for impact. Geneva: World Health Organization; 2022
*
* Data Concepts:
* HIV.B.DE81: HIV test type | Type of HIV test
* HIV.B.DE82: Rapid diagnostic test for HIV | Antibody test for HIV performed with a rapid diagnostic
* HIV.B.DE83: Enzyme immunoassay for HIV | Antibody test for HIV performed with an enzyme immunoassay
* HIV.B.DE84: Nucleic acid test for HIV | Virological test, which includes testing for early infant diagnosis
* HIV.B.DE85: Dual HIV/syphilis rapid diagnostic test | Antibody test for HIV and syphilis performed with a rapid diagnostic
* HIV.B.DE86: HIV self-test | Antibody test for HIV performed by self-tester using a rapid diagnostic
* HIV.B.DE110: HIV test date | Date of the HIV test
* HIV.D.DE194: Date of viral load sample collection | Date and time when the sample was collected to test the client's HIV viral load
* HIV.E.DE87: Infant date of birth | The infant's date of birth (DOB) if known
* HIV.E.DE90: Age of infant | Infant age calculated using date of birth
* HIV.E.DE112: HIV-exposed infant or child | Whether the infant or child was determined to have had HIV exposure
* HIV.E.DE168: HIV test type | Type of HIV test
* HIV.E.DE169: Rapid diagnostic test for HIV | Antibody test for HIV performed with a rapid diagnostic (RDT)
* HIV.E.DE170: Enzyme immunoassay for HIV | Antibody test for HIV performed with an enzyme immunoassay (EIA)
* HIV.E.DE171: Nucleic acid test for HIV | Virological test, which includes testing for early infant diagnosis
* HIV.E.DE172: Dual HIV/syphilis rapid diagnostic test | Antibody test for HIV and syphilis performed with a rapid diagnostic
* HIV.E.DE224: HIV test date | Date of the HIV test
* HIV.G.DE8: Date of viral load sample collection | Date and time when the sample was collected to test the client's HIV viral load
* HIV.SRV.DE1: HIV test date | Date of the HIV test
* HIV.SRV.DE12: Date of viral load sample collection | Date and time when the sample was collected to test the client's HIV viral load
* HIV.SRV.DE20: HIV-exposed infant or child | Whether the infant or child was determined to have had HIV exposure
*
* Additional Context
* - what it measures: This indicator measures early HIV diagnosis in infants.
* - rationale: • High coverage of early virological testing of infants helps initiate ART early in children with confirmed HIV infection and supports counselling on efforts to prevent seroconversion of those with a negative early test result. | • Current PMTCT guidelines recommend virological testing for HIV-exposed infants within two months of birth.
* - method: For the numerator: Programme records (for example, PMTCT registers, laboratory records). | | For the denominator: Modelling-based estimates (for example, Spectrum AIM) | | The recommended reporting period is 12 months.
*
* Suggested Scoring Method: proportion | http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/proportion-measure-cqfm
*/
library HIVIND38Logic
// Included Libraries
using FHIR version '4.0.1'
include HIVCommon version '0.0.1' called HIC
include FHIRHelpers version '4.0.1'
include WHOCommon called WCom
include HIVElements called HE
include HIVIndicatorElements called HIE
// Indicator Definition
parameter "Measurement Period" Interval<Date> default Interval[@2023-01-01, @2023-01-30]
context Patient
/* Populations */
/*
*Initial Population
*/
define "Initial Population":
true
/**
* Numerator
*
* Definition: Number of HIV-exposed infants born during the reporting period who received a virological HIV test within two months (and 12 months) of birth
* Calculation: COUNT of infants who are an "HIV-exposed infant or child" with "Infant date of birth" within the reporting period AND with "Date of viral load sample collection" LESS THAN 2 months AFTER "Infant date of birth" AND "HIV test type"='Nucleic acid test for HIV'
*/
define "Numerator":
exists(HIE."HIV-exposed infant or child E.DE112" O
with [Patient] P
such that O.subject.references(P) and P.birthDate during "Measurement Period")
and exists(
HE."Nucleic acid test for HIV B.DE84" O
with [Patient] Pt
such that O.subject.references(Pt)
and months between start of O.effective.toInterval() and FHIRHelpers.ToDate(Pt.birthDate) < 2 months)
/**
* Denominator - THiS SHOULDN'T BE PROPORTION
*
* Definition: Estimated number of HIV-positive women who delivered during the reporting period. | | Note: The denominator is a proxy measure for the number of infants born to HIV-infected women.
* Calculation: *Estimated number of HIV-positive women who delivered during the reporting period
*/
define "Denominator":
true
/* end Populations */
/*
* Disaggregators
*/
define "Geographic Region Stratifier":
HIE."By Geographic Region Stratifier"
|