COVID identification in primary care - historic case



Project
OpenSAFELY
Coding system
CTV3 (Read V3) with TPP extensions
Version
2020-06-23
Codelist ID
opensafely/covid-identification-in-primary-care-historic-case

Description

Codes indicating COVID-19 historic case (1 of 7 possible types of CTV3 codes that contain information related to COVID-19)

Methodology

Search of TPP CTV3 codes for terms relating to coronavirus, with additional (manual) check for any missing terms against the SNOMED list of COVID-19 related codes. Classification as "historic case" was then performed following review of terms by six OpenSAFELY team members (including epidemiologists, clinicians, statisticians and infectious disease modellers).

References

Signed off by

  • Kevin Wing, LSHTM (June 23, 2020)
  • Alex Walker, EBM Datalab (June 23, 2020)

This definition has been computed by taking the manually created full codelist and converting it to a list of rules that define the codelist.

CTV3ID CTV3PreferredTermDesc
Y212f Antibody to 2019-nCoV (novel coronavirus)
Y23ec SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) IgG detection result positive
Y23f0 SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) IgM detection result positive
Y240a Severe acute respiratory syndrome coronavirus 2 immunoglobulin M qualitative existence in specimen (observable entity)
Y23f2 SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) total immunoglobulin arbitrary concentration in serum
Y23ed SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) IgG arbitrary concentration in serum
Y23f1 SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) IgM arbitrary concentration in serum
Y244e Arbitrary concentration of severe acute respiratory syndrome coronavirus 2 immunoglobulin A in serum (observable entity)
Y23ff Severe acute respiratory syndrome coronavirus 2 immunoglobulin G qualitative existence in specimen (observable entity)
Y23e9 Has immunity to SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2)
Y246f Severe acute respiratory syndrome coronavirus 2 immunoglobulin A detected (finding)
Y210c Severe acute respiratory syndrome coronavirus 2 serology (observable entity)

Codes in the definition are underlined. Codes in the full codelist are in blue. Related codes not in the codelist are in black.