LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations.
Updated Method from PhenX to reflect the original source of the content.; Changed "hours" to "Hs" in Component based on the LOINC model.; Updated the PhenX ID from "PhenX." to "PX" in Survey Question Source field to align with the variable identifier used in the PhenX Toolkit.