DATEFILL is the date 30 days prior to the date of the interview.
status
TRIAL
Fully-Specified Name
component
What is your best estimate of the number of D you smoked part or all of a cigarette during the past 30D
property
NRat = Number=Count/Time
time
30D = 30 days
system
^Patient
scale
Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256
days/30 days The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org)
Quick, Current, Complete - www.findacode.com