Table 2 .

LOINC Database Fields that Can Contain Supplemental Information for Assessment Instruments

Element	Size (chars)	Definition
Class	20	The name of the instrument (e.g., Nurse.Survey.Omaha)
Survey Question Text	255	The exact text of the question
Survey Question Source	50	[Instrument Name].[Question Number or Reference] (e.g., OMAHA III.26)
Comments	254	Description of construct assessed
Formula	255	Equations for calculated values
Answer List	64K	The list of allowable answers for nominal and ordinal scales