By Anonymous - November 9, 2018
Smoking
Baseline Smoking Variables
The derived smoking variables come from these baseline variables on pages E6
and E7
.
Since question E31 encourages non-smokers, cigar-smokers, and pipe-smokers to skip the remaining smoking questions;
the following variables refer to cigarette smoking unless explicitly stated.
| Meaning | |
|---|---|
| SMOKE | Have you ever smoked? | |
| SMOKENOW | | |
| 1 | No |
| 2 | Yes, cigar |
| 3 | Yes, pipe |
| 4 | Yes, cigarette |
| 0 | No |
| 1 | Yes |
| Variable | Meaning |
|---|---|
| AGESTRT | Age started smoking: set to ''.'' if logic fails | |
|
| AGESTOP | Age stopped smoking: set to ''.'' if logic fails | |
|
| SMOKEYRS | Number of years smoking as of enrollment | |
|
| QUITYRS | Number of years since stopped smoking | |
Derived Smoking Variables
A few baseline (non-derived) variables are present.
Any Smoking
All tobacco: cigarette, cigar, pipe, or unspecified.
| SMOKING | Meaning | SMOKE |
|---|---|---|
| 0 | Never | 1 |
| 1 | Ever | 2 3 4 |
Smoking History
All tobacco: cigarette, cigar, pipe, or unspecified.
| SMOKESTAT | |||
|---|---|---|---|
| SMOKECAT3 | Meaning | SMOKE | SMOKENOW |
| 0 | Never | 1 | 0 |
| 1 | Past | 2 3 4 | 0 |
| 2 | Current | 1 | |
Pipe and cigar smoking is not covered in SMOKELEVEL8.
| SMOKELEVEL8 | SMOKESTAT | ||
|---|---|---|---|
| SMOKECAT8 | SMOKECAT3 | QUITYRS | Meaning |
| 1 | 0 | Never smoked | |
| 2 | 1 | 30+ | Stopped smoking over 30 years ago |
| 3 | 1 | 21 - 30 | Stopped smoking over 20 years ago |
| 4 | 1 | 11 - 20 | Stopped smoking over 10 years ago |
| 5 | 1 | 6 - 10 | Stopped smoking over 5 years ago |
| 6 | 1 | 1 - 5 | Stopped smoking more than one year ago |
| 7 | 1 | 1 | Stopped smoking within the last year |
| 8 | 2 | Current smoker | |
Smoking Intensity
The number of cigarettes smoked daily, CIGAVG, is derived from the categorical variable SMOKEAVG which is present in the baseline questionnaire.
| CIGAVG | SMOKEAVG | Category |
|---|---|---|
| 2 | 2 | 1 - 3 |
| 5 | 3 | 4 - 6 |
| 8.5 | 4 | 7 - 10 |
| 15 | 5 | 11 - 19 |
| 25 | 6 | 20+ |
| Variable | Formula | Interpretation |
|---|---|---|
| CIGYRS | CIGAVG * SMOKEYRS | Equivalent number of years smoking one cigarette per day | | ||
| PACKYRS | CIGYRS/20 | Equivalent number of years smoking one pack per day | |