Table of Contents

Component Description

The Smoking - Household Smokers (variable name prefix SMQFAM) section of the Family dataset provides information about tobacco smoking among persons living in the home. Responses to these questions are helpful in assessing secondhand smoke exposure.

Eligible Sample

All participants were eligible.

Interview Setting and Mode of Administration

One respondent in each family answered questions about the smoking status of all members of the household. These questions were asked as part of the Family Questionnaire, in the home, using the Computer-Assisted Personal interview (CAPI) system.

Quality Assurance & Quality Control

The CAPI system is programmed with built-in consistency checks to reduce data entry errors. CAPI also uses online help screens to assist interviewers in defining key terms used in the questionnaire.

Data Processing and Editing

Inconsistent responses to these questions were adjudicated when possible. This occurred in a small percentage of households where there was more than one family. Summary variables were created during the editing process in order to preserve confidentiality and to establish more analytically useful data.

Analytic Notes

Questions about home smoking were modified in 2013-2014. SMD470 – “number of persons who smoke inside the home” – differs slightly from the question for variable SMD415 from NHANES cycles before 2013-2014. Analysts may consider combining these two variables for trend analysis.

Other questions about secondhand smoke exposure are found in the data file SMQSHS.

Questions on participant-level cigarette smoking and other tobacco use are located in SMQ and SMQRTU data files. Biochemical indicators of tobacco exposure, including serum cotinine, are available in NHANES laboratory data files.

The NHANES full sample 2-Year MEC Exam Weights (WTMEC2YR) can be used to analyze the 2017-2018 SMQFAM variables in conjunction with the laboratory measurements on tobacco exposure, or any examination-related data.

Please refer to the NHANES Analytic Guidelines and the on-line NHANES Tutorial for further details on the use of sample weights and other analytic issues.

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 0 YEARS - 150 YEARS

SMD460 - # of people who live here smoke tobacco?

Variable Name:
SMD460
SAS Label:
# of people who live here smoke tobacco?
English Text:
Now I would like to ask you a few questions about smoking in this home. How many people who live here smoke cigarettes, cigars, little cigars, pipes, water pipes, hookah, or any other tobacco product?
English Instructions:
INTERVIEWER INSTRUCTION: IF RESPONSE IS NO ONE, ENTER ZERO. ENTER NUMBER OF PERSONS. CAPI INSTRUCTION: ALLOW '0' AS AN ENTRY. RANGE EDIT: CANNOT BE GREATER THAN # OF PEOPLE IN THE HOUSEHOLD. IF '0', DK OR RF, GO TO END OF SECTION.
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No one in houseold is a smoker 6092 6092 End of Section
1 1 household member is a smoker 1667 7759
2 2 household members are smokers 867 8626
3 3 or more household members are smokers 153 8779
777 Refused 2 8781 End of Section
999 Don't know 10 8791 End of Section
. Missing 463 9254

SMD470 - # of people who smoke inside this home?

Variable Name:
SMD470
SAS Label:
# of people who smoke inside this home?
English Text:
Not counting decks, porches, or detached garages, how many people who live here smoke cigarettes, cigars, little cigars, pipes, water pipes, hookah, or any other tobacco product inside this home?
English Instructions:
ENTER NUMBER OF PERSONS. CAPI INSTRUCTION: ALLOW '0' AS AN ENTRY. HARD EDIT: NUMBER ENTERED IN SMQ.470 MUST BE EQUAL OR LESS THAN SMQ.460. IF '0', DK OR RF, GO TO END OF SECTION.
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
0 No one smokes inside the house 1717 1717 End of Section
1 1 household member smokes inside the house 588 2305
2 2 household members smoke inside the house 314 2619
3 3 or more household members smoke inside the house 68 2687
777 Refused 0 2687
999 Don't know 0 2687
. Missing 6567 9254

SMD480 - In past week # days person smoked inside

Variable Name:
SMD480
SAS Label:
In past week # days person smoked inside
English Text:
(Not counting decks, porches, or detached garages) During the past 7 days, that is since last [TODAY'S DAY OF WEEK], on how many days did {anyone who lives here/you}, smoke tobacco inside this home?
English Instructions:
ENTER NUMBER OF DAYS FROM 0 TO 7. CAPI INSTRUCTION: IF ONLY ONE PERSON LIVING IN HOUSEHOLD DISPLAY "you.." IF MORE THAN ONE PERSON LIVING IN HOUSEHOLD, DISPLAY "anyone who lives here.."
Target:
Both males and females 0 YEARS - 150 YEARS
Hard Edits:
0 to 7
Code or Value Value Description Count Cumulative Skip to Item
0 0 81 81
1 1 80 161
2 2 96 257
3 3 43 300
4 4 16 316
5 5 30 346
6 6 7 353
7 7 615 968
77 Refused 2 970
99 Don't know 0 970
. Missing 8284 9254