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documentation:vocabulary:ppi

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PPI (Participant Provided Information)

PPI is a coding system for questionnaires and self-completed surveys, that is provided by the All of Us Research Program.

Source

All PPI information is manually obtained from the All of Us PPI Codebook.

Layout

PPI Questionnaire layout consists of Modules, Topics, Questions, and Answers.

PPI source type value Description
Module A superior PPI entity representing a thematic set of topics, questions, and answers.
Currently, the following Modules are available:
1) Consent PII
2) Refresher Consent
3) EHR Consent PII
4) Family History
5) Personal Medical History
6) Healthcare Access & Utilization
7) Lifestyle
8) Overall Health
9) The Basics
10 PMI
Topic A semantic module section containing a thematic set of questions or answers
Question A multiple-choice or open-ended question requesting information
Answer An answer representing a defined statement or free text

Concept Names

PPI source names are represented in a “display” field. However, to avoid concept name duplicates, modified PPI names have been made through the parsing of their source codes (values of a “pmi_code” field). Original “display” values were put into the CONCEPT_SYNONYM table.

Standard concept

If a PPI concept has a standard LOINC or SNOMED equivalent, it is considered to be Non-standard. If a PPI concept does not have a standard LOINC or SNOMED equivalent, it is considered to be Standard.

Domains and Concept Classes

PPI source type value Concept Class Domain
Module Module Observation
Topic Topic Observation
Question Question Observation
Answer Answer Observation
Protocol modification PPI Modifier Observation
Physical measurement Clinical Observation Measurement

Internal PPI relationships

A purpose of Internal PPI relationships is to build a PPI Hierarchy, which makes it easier to understand the relations between PPI concepts of different types.

External PPI relationships

A purpose of Internal of External PPI relationships is the following:

  • to build PPI-LOINC-SNOMED hierarchical crosswalks based on the Internal PPI Hierarchy.
  • to simplify s cross-analysis of patient-related information with a context of combined use of the PPI and such a coding system as either the LOINC or SNOMED.

Hierarchical crosswalks

The PPI Hierarchical crosswalks include only standard concepts. A PPI standard concept value depends on the existence of an equivalent mapping either to the SNOMED or LOINC. In turn, a standard SNOMED/LOINC equivalent, if present, takes place of a non-standard PPI concept in the Internal PPI Hierarchy and adopts all its ancestors and descendants.

documentation/vocabulary/ppi.1578493098.txt.gz · Last modified: 2020/01/08 14:18 by ptalapova