Strong D, Glasser A, Leas E, Pierce J, Abrams D, Hwyrna M, Hyland A, Cummings M, Hatsukami D, Fong G, Elton-Marshall T, Sharma E, Edwards K, Stanton C, Sawdey M, Ramôa C, Silveira ML, Kimmel HL, Niaura R.
Indicators of Tobacco Dependence among Youth: Findings from Wave 1 (2013-2014) of the Population Assessment of Tobacco and Health (PATH) Study.
Nicotine Tob Res. 2023 May 9:ntad072. doi: 10.1093/ntr/ntad072. Epub ahead of print. PMID: 37156636.

Background. Prior work established a measure of tobacco dependence (TD) among adults that can be used to compare TD across different tobacco products. We extend this approach to develop a common, cross-product metric for TD among youth.

Methods. 1,148 youth ages 12 to 17 who used a tobacco product in the past 30-days who were identified from 13,651 youth respondents in Wave 1 of the Population Assessment of Tobacco and Health (PATH) Study.

Findings. Analyses confirmed a single primary latent construct underlying responses to TD indicators for all mutually exclusive tobacco product user groups. Differential Item Functioning (DIF) analyses supported use of 8 of 10 TD indicators for comparisons across groups. With TD levels anchored at 0.0 (standard deviation (SD)=1.0) among cigarette only (n=265) use group, mean TD scores were more than a full SD lower for e-cigarette only (n=150) use group (mean=-1.09; SD=0.64). Other single product use group (cigar, hookah, pipe, or smokeless; n=262) on average had lower TD (mean=-0.60; SD= 0.84), and the group with use of multiple tobacco products (n=471) experienced similar levels of TD (mean=0.14; SD= 0.78) as the cigarette only use group. Concurrent validity was established with product use frequency among all user groups. A subset of 5 TD items comprised a common metric permitting comparisons between youth and adults.

Conclusion. The PATH Study Youth Wave 1 Interview provided psychometrically valid measures of TD that enables future regulatory investigations of TD across tobacco products and comparisons between youth and adult tobacco product use group.

Implications. A measure of tobacco dependence (TD) has been established previously among adults to compare TD across tobacco products. This study established the validity of a similar, cross-product measure of TD among youth. Findings suggest a single latent TD construct underlying this measure, concurrent validity of the scale with product use frequency across different types of tobacco users, and a subset of common items that can be used to compare TD between youth and adults who use tobacco.