Table 1.
Tobacco User Classification
| Tobacco user group | Definition |
|---|---|
| All tobacco users (n = 8875) | All current established every day or intermittent cigarette, cigar, cigarillo, filtered cigar, pipe, hookah, smokeless, snus pouches, dissolvable, and e-cigarette users. |
| Exclusive combustible product user (n = 5565) | |
| Daily (n = 3180) | Current users who are both established and every day users of only cigarette, cigar, cigarillo, filtered cigar, pipe, and/or hookah; not users of any other tobacco products. |
| Intermittent (n = 2385) | Current experimental or someday users who use only cigarette, cigar, cigarillo, filtered cigar, pipe, and/or hookah; not users of any other tobacco products. |
| Exclusive smokeless product user (n = 476) | |
| Daily (n = 355) | Current users who are both established and every day users of only smokeless, snus, and/or dissolvable products; not using any other tobacco products. |
| Intermittent (n = 121) | Current experimental or someday users who use only smokeless, snus, and/or dissolvable products; not using any other tobacco products. |
| Exclusive e-cigarette user (258) | |
| Daily (n = 152) | Current users who are both established and every day users of only e-cigarettes; not using any other tobacco products. |
| Intermittent (n = 106) | Current experimental or someday users of only e-cigarettes; not using any other tobacco products. |
| Polyuser (n = 2576) | |
| Daily (n = 1987) | Current established every day user of combustibles, smokeless, and/or e-cigarettes and daily or intermittent user of at least one other category. |
| Intermittent (n = 589) | Current experimental or someday users of combustibles, smokeless, and/or e-cigarettes and intermittent user of at least one other category. |
|
All non-users (n = 2098) |
The combination of former users and never users. |
| Former (n = 557) | Former established or experimental cigarette, cigar, cigarillo, filtered cigar, pipe, hookah, smokeless tobacco, snus, dissolvable, and/or e-cigarette users, including former Nicotine replacement therapy (NRT) users, all with the last use within the previous 12 months. |
| Never (n = 1541) | Never used any tobacco product (cigarette, cigar, cigarillo, filtered cigar, pipe, hookah, smokeless tobacco, snus pouches, dissolvable, and/or e-cigarette) or NRT. |
1.These sample sizes are for cotinine, trans-3′-hydroxycotinine, and TNE2. Sample sizes are smaller for nicotine and the minor metabolites due to participants missing measurements for nicotine or minor metabolites.
2.Tobacco use classifications are based on coding self-reported data PRIOR to weighting.
3.Established cigarette user: used more than 100 cigarettes in lifetime and currently smokes every day or some days; established user of product other than cigarettes: used product fairly regularly and currently uses every day or some days.
4.Experimental cigarette user: used less than 100 cigarettes in lifetime and currently smokes every day or some days; experimental user of product other than cigarettes: never used product fairly regularly and currently uses every day or some days.
5.All “user” categories (except for former user) exclude pharmaceutical nicotine sources such as nicotine replacement therapy (NRT).
6.All “user” categories (except for never user) can include former users of any tobacco products or pharmaceutical nicotine sources.
7.All retained subjects had urine creatinine levels (10 ≤ UCREAT ≤ 370) to eliminate abnormally dilute or concentrated samples.
8.All retained subjects had values for age, gender, race-ethnicity, educational level, and tobacco use status.
9.All retained subjects included COTT and HCTT measurements including those with non-detectable levels (such as nonsmokers).
10.Exclusions were made for: use of NRT = 114; creatinine <10 or >370 = 247; lack of information on product use group = 136; no measurement of COTT or HCTT available = 49; withdraw = 3. Wave 1 received subjects (11 522) – exclusions (549) = sample size of 10 973.