The NHANES full sample 2-Year MEC Exam Weights ( WTMEC2YR) should be used to analyze the 2017-2018 SMQ variables in conjunction with the laboratory measurements on tobacco exposure or other examination measurements. Biochemical indicators of tobacco exposure, including serum cotinine, are available in several laboratory data files. When combining multiple years of tobacco data, analysts are advised to refer to all tobacco-related codebooks and carefully review the target age for each variable in the relevant data files.Īdditional questions on tobacco use and exposure are located in SMQRTU, SMQFAM and SMQSHS data files.
In addition, in 2013-14, the age range changed by mode the ACASI in the MEC was used only of youths aged 12-17 years. Beginning in 2005-2006, the data file release format was altered, combining data collection modes, and dividing the data by topic for all ages between two files: SMQ (cigarette use as reported in the home interview) and SMQRTU (recent tobacco use as reported in the MEC). NOTE, persons not asked a question due to a skip pattern in previous responses were coded as missing (“.”).įor clarification on all question changes in this section, analysts also should consult the “variable names across cycles,” listing that appears at the end of the frequency counts in the documentation.įor three data release cycle files (1999-2004), all of the tobacco use data obtained for youth during the MEC ACASI interview was released in the SMQMEC data files, and tobacco use data for adults was released in both the SMQ and SMQMEC data files. For example, to determine current cigarette smoking status (based on self-report only), consider the responses for the preliminary question (SMQ.020) about whether persons have smoked 100 cigarettes in lifetime, as well as responses to the follow-up question on current cigarette use (SMQ.040), which are only asked of persons who said “yes” to SMQ.020. If skip patterns are not considered, estimates may be based on a portion rather than on the entire population. Data on brand of usual cigarette for youths is very limited.Īnalysts are advised to carefully review skip patterns for this question series, and to re-code or create new variables, as needed. SMQ665A-SMQ665D show product sub-brand names. SMQ661: Data collection questions on cigarette brands for youth aged 12-17 years were modified in 2013-2014, and were released as SMQ661.
The cigarette brand was not identified for 4 respondents these were coded as “other brand.” SMD100BR: This variable includes the cigarette brand for persons who showed their cigarette pack at the interview (SMD093=1) and persons who did not have their pack (SMD093=2), but reported a usual brand. For a select number of brands, the data base also included mean tar, nicotine and CO levels (SMD100TR, SMD100NI, SMD100CO) obtained from the Federal Trade Commission. The UPC was not matched for 106 packs seen. tobacco sales) containing UPC, cigarette name, sub-brand, package color, as well as filter, length and menthol designation.
SMDUPCA: The Universal Product Code (UPC) from the cigarette pack barcode and brand name was matched to an data base of domestic and imported cigarettes (based on Nielsen U.S. Data Processing and Editingĭuring post-data collection, edits were made to ensure completeness, consistency and analytic usefulness of the data. CAPI also uses online help screens to assist interviewers in defining key terms used in the questionnaire. The CAPI and ACASI systems are programmed with built-in consistency checks to reduce data entry errors. For youth aged 12-17 years, the questions were asked at the Mobile Examination Center (MEC) during the MEC Interview using the Audio Computer-Assisted Self-Interview (ACASI) system, in English and Spanish only. Interview Setting and Mode of Administrationįor adults aged 18 years or older, questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interview (CAPI) system.
Each variable in this documentation provides the target age. Questions are limited for youth aged 12-17 years. For participants aged 12-17 years, there were no proxy interviews. Eligible SampleĪll participants aged 12 years and older were eligible. Questions on ever use of cigars, smokeless tobacco, and electronic nicotine delivery systems (including e-cigarettes) were new in 2015-16 (18 years and older). The Smoking - Cigarette Use (variable name prefix SMQ) dataset provides a history of cigarette use, age at initiation, past 30-day use, cigarette brand, sub-brand and other related details.