Measurement to ascertain the respondent's age of initiation of first use of substances. This question is repeated for each substance noted in the Substances - Lifetime Use measure.
status
DISCOURAGED
Fully-Specified Name
component
PhenX - substance - age of first use protocol 031201
property
-
time
Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements.
system
^Patient
scale
-
method
PhenX
Additional Names
short name
Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; Random; Subs; Substance age first use proto
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