Notes on All Tables
- Several federal surveys are used to track tobacco use in the US population, each with slightly different assessments. These tables are examples of analyses of the 2018-19 data file that are available from the US Census Bureau.
- The table data are weighted for the sample design and for CPS Smoking Supplement self-response.
- Tabled values may not sum to 100% due to rounding.
- These tables contain simple parameter estimates (percentages and means), and measures of variance in the form of 95% confidence intervals. These confidence intervals were estimated using replicate weights. Alternative estimates of variance and confidence intervals can be made for simple analyses using Attachment 16 of the 2018-19 Tobacco Use Supplement File of the US Census Bureau Technical Documentation. Replicate weights necessary for more complex analysis such as regression or analysis of variance are available from NCI.
Notes on Table 1
As an example of the analysis of cigarette smoking prevalence, Table 1 contains estimates for several categories of smoking behavior. Smoking status was determined by asking respondents:
- "(Have/has) (you/name) smoked at least 100 cigarettes in (your/his/her) entire life?", and
- "(Do/does) (you/name) now smoke cigarettes everyday, some days, or not at all?"
Current smokers = smoked 100 or more cigarettes in their lifetime, and smoked every day or some days.
Former smokers = smoked 100 or more cigarettes in their lifetime, but no longer smoking at the time of the interview.
Never smokers = smoked less than 100 cigarettes in their lifetime, for all ages 18+ consistent with the SMOKSTAT coding.
Note: Respondents with unknown current cigarette smoking status are excluded from the data.
Notes on Table 2
Table 2 reflects the percentage of survey respondents self-reporting: a) that smoking is not allowed inside their home, and b) that smoking is not allowed in their place of employment.
Home-ban values are determined from the item: "Which statement best describes the rules about smoking in your home: No one is allowed to smoke anywhere, smoking is permitted in some places or at some times, or smoking is permitted anywhere?" Responses of "No one is allowed to smoke anywhere" are tabulated for this table.
Complete restriction of smoking at work was determined by asking respondents who worked indoors (and who are not self-employed, or working in someone else's or their own home, in several buildings, or in a motor vehicle) three questions (see Table footnote for question wording).
Notes on Table 3
Current use of e-cigarettes was determined by asking respondents:
- "(Have/has) (you/name) ever used e-cigarettes even one time?”, and
- "(Do /does) (you/name) now use an e-cigarette every day, some days or not at all?
Current e-cigarette users = used e-cigarettes even one time, and used e-cigarettes every day or some days.
Note: Respondents with unknown current e-cigarette use status are excluded from the data.