PreNUDGE FHIR® IG for Data Provider / Data from Apps (R4)
0.1.0 - ci-build

PreNUDGE FHIR® IG for Data Provider / Data from Apps (R4) - Local Development build (v0.1.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## CodeSystem: AT PreNUDGE Physical Activity Classification Method CodeSystem

Official URL: https://fhir.hl7.at/prenudge/appdata/r4/CodeSystem/at-prenudge-physical-activity-classification-method-cs | Version: 0.1.0
Active as of 2026-06-25 | Responsible: The PreNUDGE Consortium | Computable Name: AtPrenudgePhysicalActivityClassificationMethodCS

Codes for the algorithm or technique used to classify the intensity of a physical activity measurement into moderate / vigorous categories.

This Code system is referenced in the content logical definition of the following value sets:

- PrenudgePhysicalActivityClassificationMethodVS

This case-sensitive code system `https://fhir.hl7.at/prenudge/appdata/r4/CodeSystem/at-prenudge-physical-activity-classification-method-cs` defines the following codes:

Code | Display | Definition
hrz | Heart Rate Zones | Intensity derived from percentage of maximum heart rate. Moderate: 50–70 % HRmax; Vigorous: > 70 % HRmax. Applicable to Automated sources (method = SCT 8359006) only.
met-lu | MET Value Look-up | MET assigned from a reference table (e.g. Ainsworth Compendium of Physical Activities). Moderate: 3.0–5.9 MET; Vigorous: ≥ 6.0 MET. Applicable to Automated sources only.
met-cal | MET Value Calculated | MET estimated from raw sensor data (e.g. accelerometer signal, VO2 proxy algorithm). Moderate: 3.0–5.9 MET; Vigorous: ≥ 6.0 MET. Applicable to Automated sources only.
self-rp | Self-Reported via Questionnaire | Patient-reported activity type used as the basis for intensity classification. The MET look-up table is applied to the reported activity type. Applicable to both Automated and Manual sources. For Manual sources (SCT 87982008) this is the ONLY permitted code (see pa-manual-comp-01).