Sex Differences in the Association of E-cigarette and Cigarette Use and Dual Use With Self-Reported Hypertension Incidence in US Adults.

BACKGROUND

While there is some evidence and conceptual plausibility that tobacco product use is associated with hypertension incidence and that this association varies by sex, extant longitudinal research had been conducted prior to the emergence of e-cigarette and dual e-cigarette and cigarette use.

AIMS AND METHODS

Data were analyzed from the US Population Assessment of Tobacco and Health study for adults with no lifetime history of hypertension at wave 1 (2013-2014) who completed waves 2-4 follow-up surveys (2014-2018; n = 16 434). Sex-stratified weighted covariate-adjusted multivariable Cox regression models were used to examine the association between established current e-cigarette or cigarette exclusive or dual-use (as a time-varying and time-lagged regressor) and subsequent self-reported hypertension onset.

RESULTS

Weighted cumulative hypertension incidence by wave 4 varied by waves 1-3 e-cigarette, cigarette, and dual use status in females (nonuse [incidence: 9.9%], exclusive e-cigarette use [11.8%], exclusive cigarette use [14.8%], dual-use [12.4%]; p = .003 for omnibus differences among all groups) but not males (nonuse [12.6%], exclusive e-cigarette use [9.7%], exclusive cigarette use [13.7%], dual-use [9.3%]; p = .231). Among females, exclusive cigarette (vs. no) use (hazard ratio: 1.69, 95%CI 1.21 to 2.34; p = .002), but not exclusive e-cigarette or dual-use, was significantly associated with subsequent hypertension. Dose-response models were suggestive that consistent exclusive e-cigarette or dual-use versus nonuse across multiple may be associated with hypertension among females, but results were nonsignificant.

CONCLUSIONS

The association of e-cigarette, cigarette, and dual use with hypertension may differ by sex, whereby exclusive cigarette use could be a prospective risk factor for subsequent self-reported hypertension in US adult females.

IMPLICATIONS

This nationally representative cohort study provides the very first evidence of whether there are prospective associations of established e-cigarette and cigarette use and dual use with future hypertension onset among US adult females and males. We found that exclusive cigarette smoking was associated with an increased risk of incident hypertension among females, but not males. We observed a trend of a dose-response relationship between e-cigarette use and risk of incident hypertension among female exclusive e-cigarette users or dual e-cigarette and cigarette users. Our study will contribute to understanding the chronic health risks of vaping to prevent the potential long-term e-cigarette use-related health burden.