Measurement to ascertain the respondent's age of initiation of first/regular use of cigarettes, which can be used to calculate duration of use and pack-years measures. There are two questions in this protocol. The first question is asked of respondents classified as a "Smoker" or "Non Smoker" in the Tobacco - Smoking Status (Adolescent Protocol). The second question is asked of three categories of smokers: "Current Every-Day Smoker" as well as "Current Some-Day Smoker" and "Former Smoker" if these last two respondent categories had also responded "yes" to the last question in the Tobacco - Smoking Status (Adolescent Protocol).
status
ACTIVE
Fully-Specified Name
component
PhenX - tobacco - age of initiation of use - adolescent protocol 030701
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; Tobac age init use adoles proto
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