|Home | About | Journals | Submit | Contact Us | Français|
To examine waterpipe tobacco smoking prevalence and smoker perceptions.
Past 30-day waterpipe tobacco smoking was reported by 20% (151/744). Relative to never users, users were more likely to perceive waterpipe as less harmful than cigarettes.
Waterpipe tobacco smoking is a growing public health issue.
Waterpipe smoking is a traditional method of tobacco use, especially in the Eastern Mediterranean Region (1). Its use is spreading worldwide (1), and its prevalence in the U.S. is uncertain. One anecdotal report suggests it may be particularly common among college students (2), and a recent survey of 411 first-year university students indicated 15.3% of respondents reported past 30-day waterpipe use (3). This use may be driven by a perception of lower health risk, relative to cigarette smoking, as has been reported elsewhere (3, 4).
A waterpipe (hookah, shisha) has a mouthpiece, hose, water bowl, body, and a “head” that is filled with sweetened and flavored tobacco and then heated with charcoal (1,5). During an inhalation from the mouthpiece, charcoal and tobacco smoke pass through the body, bowl, and hose and into the user’s lungs. Waterpipe and cigarette smoke contain some of the same toxicants (6). However, waterpipe use may be associated with greater toxicant exposure because longer use episodes and more and larger puffs lead to inhalation of 100 times more smoke than a cigarette (5–7).
Only one other published study has reported the prevalence of waterpipe use in a representative sample of university students from the U.S. and this study did not examine correlates of use (3). This survey of Virginia Commonwealth University (VCU) students examined waterpipe tobacco smoking prevalence and smokers’ health-related perceptions.
A cross-sectional, IRB-exempt internet survey was conducted among the 1,194 students enrolled in VCU Introduction to Psychology courses (March 8 through May 4, 2006). Participants were ≥ 18 years of age and earned course credit for research participation. Except for university-specific content, survey items were as reported elsewhere (3) and covered demographics, tobacco use, risk perceptions, and perceived social acceptability. The survey was completed by 744 respondents. The response rate of 62.3% may reflect the popularity of research participation as a method for earning course credit and the convenience of on-line surveys.
All statistical analyses were conducted using SAS Version 9.1 (SAS Institute, Cary, NC). Logistic regression was used to compare past 30-day versus never waterpipe tobacco smokers in terms of (i) sociodemographic characteristics, (ii) ever and past month cigarette and cigar use, (iii) perceptions related to harm potential, (iv) peer influences on use, and (v) social acceptability of use. Bivariate logistic analyses were conducted as a first step, after which age, sex, race/ethnicity, and income were forced into a multivariable logistic model. All variables that were statistically significant (p<.05) in bivariate analyses were then entered as a block and non-significant (p>.05) variables were removed using backwards elimination to arrive at a final model. Odds ratio and the 95% confidence interval were reported for variables in the final model.
Participant demographics are described in detail in Table 1. Of the 744 participants, 65% were women, 72% were 18 or 19 years old, 57% were White, and 20% had smoked a waterpipe in the past month.
In a multivariable model (Table 2), use of waterpipe during the past 30 days, compared to never-use, was associated with greater likelihood of having smoked cigarettes (OR=10.44) and cigars/cigarillos (OR=6.31) in the past 30 days, and greater likelihood of believing that waterpipe makes peers look “cool” (OR=2.47) and that waterpipe use is socially acceptable among peers (OR=3.71). In addition, use of waterpipe was associated with younger age (OR = 0.39), lower likelihood of being African American than White (OR=0.35), lower perceived harmfulness (OR=0.31) and addictiveness (OR=0.65) of waterpipe compared to cigarettes, and lower perceived social acceptability of cigarette use among peers (OR=0.43). The negative association between social acceptability of cigarette use and waterpipe use (OR=0.43) and opposite of that observed in the bivariate model (OR=1.51), and was driven by two confounders: past 30 day cigarette use and perceived social acceptability of waterpipe use.
Results from this survey of 744 undergraduates indicate that past 30-day waterpipe tobacco smoking was 20%. Given previous reports (2,3,8,9), waterpipe tobacco smoking seems common on U.S. college campuses and the potential health risks of this behavior (5,7) suggest that it and may become a significant public health problem. Results also indicate that past 30-day waterpipe users were much less likely than never-users to believe that waterpipe is as harmful as cigarettes. These perceptions of lower risk may contribute to the spread of waterpipe tobacco smoking in the U.S.
We also observed that, relative to respondents who had never smoked tobacco using a waterpipe, past 30-day waterpipe tobacco smokers were more likely to be men, younger than 20 years of age, and White. While the influence of sex and race is uncertain, the popularity of waterpipe use among younger students may be related to the fact that these individuals cannot access bars where alcohol is served, and may instead socialize in alcohol-free waterpipe cafes.
Waterpipe tobacco smokers in this sample also reported using other tobacco products (see Table 2). Concurrent use of other tobacco products may contribute to development of nicotine/tobacco dependence, which can then maintain tobacco use via a variety of mechanisms (10). In addition, concurrent use of other tobacco products can make the study of long-term health effects of waterpipe tobacco smoking challenging. Controlling for other tobacco products will be essential if we are to learn the influence of waterpipe tobacco smoking on cancer, cardiovascular disease, and lung disease.
These results, from a convenience sample taken from a single university in one U.S. state, along with other reports from other states (2,3,9) should be a clarion call to the U.S. public health and medical communities. An appropriate response could include nationwide surveillance that can be used to identify the extent of waterpipe’s spread and gauge the effectiveness of interventions designed to reduce it. Future studies in the U.S. should assess prevalence of waterpipe in nationally representative samples, potential health-damaging and dependence-producing effects, and whether waterpipe use among youth serves as a “gateway” for use of other tobacco products or psychoactive substances.
This work was supported by PHS grants R01CA103827, R01DA011082, R01TW005962, and R03TW07233.
Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.