Generated Narrative: Library HIVIND62Logic

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/**
 * Library: HIV.IND.62 Logic
 * Ref No: STI.2A
 * Short Name: Syphilis test positivity, HIV prevention services
 *
 * Definition: % of people attending HIV prevention services who were tested for syphilis and had a positive syphilis test result during the reporting period
 *
 * Numerator: Number of people attending HIV prevention services who tested positive for syphilis during the reporting period (tested positive on both nontreponemal and treponemal tests or tested positive on either nontreponemal or treponemal test) | 
 * Numerator Calculation: COUNT of clients with "Syphilis test date" in the reporting period AND "Syphilis test result"='Positive'
 * Numerator Exclusions: 
 *
 * Denominator: Number of people attending HIV prevention services tested for syphilis | 
 * Denominator Calculation: COUNT of clients with "Syphilis test date" on "Date accessed HIV prevention intervention" in the reporting period
 * Denominator Exclusions: 
 *
 * Disaggregations:
 * • Gender (female, male, other*) 
 *  • Age (15–19, 20–24, 25–29, 30–49, 50+ years) 
 *  • Key populations (men who have sex with men, people living in prisons and other closed settings, people who inject drugs, sex workers, trans and gender diverse people)** 
 *  • HIV status (HIV-positive, HIV-negative, unknown status) 
 *  • HIV prevention intervention (for example, PrEP service) 
 *  • Cities and other administrative regions of epidemiologic importance
 *
 * Disaggregation Elements: Gender | Age | Key population member type | HIV status | HIV prevention intervention
 *
 * Numerator and Denominator Elements:
 * Date accessed HIV prevention intervention 
 *  Syphilis test date 
 *  Syphilis test result
 *
 * Reference: Consolidated guidelines on person-centred HIV strategic information: strengthening routine data for impact. Geneva: World Health Organization; 2022
 * 
 * Data Concepts:
 * HIV.A.DE17: Age | Calculated age (number of years) of the client based on date of birth
 * HIV.A.DE18: Gender* | Gender of the client*
 * HIV.A.DE19: Female | Client identifies as female
 * HIV.A.DE20: Male | Client identifies as male
 * HIV.A.DE21: Transgender male | Client identifies as transgender male
 * HIV.A.DE22: Transgender female | Client identifies as transgender female
 * HIV.A.DE23: Other | Additional category
 * HIV.B.DE50: Key population member type* | The type of key population that the client is included in
 * HIV.B.DE51: Sex worker | Client is a sex worker
 * HIV.B.DE52: Men who have sex with men | Client is a man who has sex with men
 * HIV.B.DE53: Trans and gender-diverse people | Client identifies as trans and gender-diverse
 * HIV.B.DE54: People who inject drugs | Client is a person who injects drugs
 * HIV.B.DE55: People living in prisons and other closed settings | Client lives in a prison or another closed setting
 * HIV.B.DE115: HIV status | HIV status reported after applying the national HIV testing algorithm. No single HIV test can provide an HIV-positive diagnosis.
 * HIV.B.DE116: HIV-positive | Client is HIV-positive
 * HIV.B.DE117: HIV-negative | Client is HIV-negative
 * HIV.B.DE118: Unknown | Client has unknown HIV status
 * HIV.B.DE249: Syphilis test date | Date of syphilis test
 * HIV.B.DE250: Syphilis test result | Result from syphilis test
 * HIV.B.DE251: Positive | Test result is positive for syphilis
 * HIV.B.DE252: Negative | Test result is negative for syphilis
 * HIV.B.DE253: Inconclusive | Test result is inconclusive
 * HIV.D.DE801: Syphilis test date | Date of syphilis test
 * HIV.D.DE802: Syphilis test result | Result from syphilis test
 * HIV.D.DE803: Positive | Test result is positive for syphilis
 * HIV.D.DE804: Negative | Test result is negative for syphilis
 * HIV.D.DE805: Inconclusive | Test result is inconclusive
 * HIV.E.DE114: Key population member type* | The type of key population that the infant's mother is included in
 * HIV.E.DE115: Sex worker | Infant's mother is a sex worker
 * HIV.E.DE116: People who inject drugs | Infant's mother is a person who injects drugs
 * HIV.E.DE117: Trans and gender-diverse people | Infant's mother identifies as trans and gender-diverse
 * HIV.E.DE118: People living in prisons and other closed setting | Infant's mother is in a prison or closed setting
 * HIV.G.DE69: Syphilis test date | Date of syphilis test
 * HIV.G.DE70: Syphilis test result | Result from syphilis test
 * HIV.G.DE71: Positive | Test result is positive for syphilis
 * HIV.G.DE72: Negative | Test result is negative for syphilis
 * HIV.G.DE73: Inconclusive | Test result is inconclusive
 * HIV.PRV.DE2: HIV prevention intervention | HIV prevention intervention that client accessed
 * HIV.PRV.DE3: PrEP service | Client accessed PrEP services
 * HIV.PRV.DE4: OAMT | Client accessed opioid agonist maintenance treatment (OAMT) services
 * HIV.PRV.DE5: NSP | Client accessed needle-syringe programme (NSP) services
 * HIV.PRV.DE6: STI services | Client accessed sexually transmitted infection (STI) services
 * HIV.PRV.DE7: VMMC | Client accessed voluntary medical male circumcision (VMMC) services
 * HIV.PRV.DE8: Other | Client accessed other HIV prevention services
 * HIV.PRV.DE10: Date accessed HIV prevention intervention | Date the client accessed HIV prevention intervention
 *
 * Additional Context
 * - what it measures: A: % of people attending HIV prevention services who were tested for syphilis and had a | positive syphilis test result during the reporting period | B: % of people living with HIV who were tested for syphilis and had a positive syphilis test result during the reporting period | C: % of pregnant women who were tested for syphilis and had a positive test result during the reporting period
 * - rationale: • Syphilis test positivity can be used to identify areas within a country that require additional support and can provide early warning of potential changes in HIV and STI transmission in the general population. | • Syphilis test positivity data are an important source for generating national, regional and global incidence and prevalence estimates for syphilis and congenital syphilis.
 * - method: Individual-level data obtained from programme records |  | If individual-level data are not available, the indicator can be reported using aggregate programme data. |  | Syphilis positivity can be a positive treponemal test, a reactive nontreponemal test or a combination of both. It is important to report the testing (screening) algorithm generally used in the country. If both treponemal and nontreponemal test results on an individual person are available, then syphilis positivity should be defined as having positive results in both tests. Collecting information on the testing algorithm used to determine positivity is important so that prevalence estimates can be adjusted to look at trends.
 * 
 * Suggested Scoring Method: proportion | http://hl7.org/fhir/us/cqfmeasures/StructureDefinition/proportion-measure-cqfm
 */

library HIVIND62Logic

// 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
include HIVConfig called Config

// 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 people attending HIV prevention services who tested positive for syphilis during the reporting period (tested positive on both nontreponemal and treponemal tests or tested positive on either nontreponemal or treponemal test) | 
 * Calculation: COUNT of clients with "Syphilis test date" in the reporting period AND "Syphilis test result"='Positive'
 */

define "Numerator":
  exists(HE."Positive B.DE251" S
  with HE."Syphilis test date B.DE249" P
  such that S.partOf.references(P) and P.performed.toInterval() during "Measurement Period")



/**
 * Denominator
 *
 * Definition: Number of people attending HIV prevention services tested for syphilis | 
 * Calculation: COUNT of clients with "Syphilis test date" on "Date accessed HIV prevention intervention" in the reporting period
 */

define "Denominator":
  exists(HE."Syphilis test date B.DE249" P
  where P.performed.toInterval() during "Measurement Period"
  and exists (HE."Date accessed HIV prevention intervention" t where t = start of P.performed.toInterval()))
    

/* end Populations */

/*
 * Disaggregators
 */

define "Administrative Gender Stratifier":
	HIE."By Administrative Gender Stratifier"

define "Age Stratifier":
	HIE."By Age Stratifier 2"

define "Geographic Region Stratifier":
	HIE."By Geographic Region Stratifier"

define "patientGroups Stratifier":
	HIE."patientGroups"

define "HIV prevention intervention":
	HIE."HIV prevention intervention"

define "HIV Status":
  HIE."HIV Status Stratifier"

define "Stratification":
 HIE."By Administrative Gender Stratifier".code 
  + ':' + HIE."By Age Stratifier 2"
+ ':' + HIE."By Geographic Region Stratifier"
+ Combine(HIE.patientGroups, ':')
+ Combine(HIE."HIV prevention intervention", ':')
+ ':' + HIE."HIV Status Stratifier".code 

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