Codes and Frequencies
For sample adults age 18 and older who have smoked at least 100 cigarettes, and have not smoked for at least the last 30 days, QUITNO reports a numerical response associated with a type of time period (QUITTP) that reports the length of time since the person quit smoking cigarettes. Users should combine these two variables to determine the length of time since the person quit smoking cigarettes. Please see the universe tab for detailed information about who was asked this question.
There are minor changes in the universe statement between years, as outlined in the Universe tab, which impact the comparability of this variable over time. Users are advised to consider the impact that changes in the universe may have on their analyses when using data from multiple years.
Changes in survey design (e.g., quarters in which the supplement was collected) may affect raw frequencies, but do not affect comparability of the variable. As always, data users should use the prescribed IPUMS NHIS weights.
- 1992: Half of sample persons age 18+ in quarters 1 and 2, and in 2 weeks of quarter 3 (excluded from CAEP supplement) who have smoked at least 100 cigarettes and either do not currently smoke or smoke some days but have not smoked in the past 30 days.
- 1994-1995: Half of sample persons age 18+ (excluded from AIDS supplement) who have smoked at least 100 cigarettes and don't currently smoke.
- 1997-2018: Sample adults age 18+ who have smoked at least 100 cigarettes and don't currently smoke.
- 1992, 1994-1995, 1997-2018