Codes and Frequencies
For sample persons age 17 and older in 1978-1980, and sample persons age 18 and older in 1990-1992 who were current smokers and ever tried to quit smoking, CSOFFNO reports a number of units associated with a time period reported in a separate variable. Together, these two variables indicate the amount of time the respondent stayed off cigarettes the last time they stopped smoking or during their most recent serious attempt to quit. Users should combine CSOFFNO with CSOFFTP to determine the amount of time the person stopped smoking cigarettes. Please see the Universe tab for changes in universe between samples.
The differences in universe described in the Universe tab impact the comparability of this variable over time.
In 1978 1980, and 1992, this question was not asked in all quarters of the survey. Changes in survey design such as these affect raw frequencies but do not affect comparability between samples. As always, data users should apply prescribed IPUMS NHIS weights.
- 1978; 1980: Sample persons age 17+ in quarters 3 and 4 who ever smoked 100 cigarettes in their entire lives, ever smoked regularly, smoke now, and ever seriously attempted to quit smoking at least once.
- 1979: Sample persons age 17+ who ever smoked 100 cigarettes in their entire lives, ever smoked regularly, smoke now, and ever seriously attempted to quit smoking at least once.
- 1990: Sample persons age 18+ who were not asked the smoking questions in the Pregnancy and Smoking section, who ever smoked 100 cigarettes, who smoke cigarettes now or for whom it was unknown if they smoke now, and who ever made a serious attempt to quit smoking.
- 1991: Sample persons age 18+ who currently smoke every day and ever quit for one day or more.
- 1992: Half of sample persons age 18+ in quarters 1 and 2 and 2 weeks of quarter 3 (excluded from CAEP supplement) who ever smoked 100 cigarettes, smoke cigarettes now, smoke cigarettes every day, and ever stopped smoking for 1 day or more.
- 1978-1980, 1990-1992