Related Experiment Video
Updated: May 1, 2026

Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies
Published on: August 25, 2018
Lifetime and current waterpipe use among adolescents in Tehran, Islamic Republic of Iran
Abstract:
Waterpipe use among Iranian adolescents has become a matter for concern. A descriptive, cross-sectional community-based survey was performed in 2010 to determine the prevalence of waterpipe use and associated factors among Iranian adolescents in Tehran, Islamic Republic of Iran. After multi-stage, random cluster sampling 1201 adolescents aged 15-18 years old responded to a questionnaire based on the Youth Risk Behavior Surveillance. The prevalence of current waterpipe smoking (at least once in the previous 30 days) was 28.0%, significantly higher among males (34.8%) than females (21.4%). A total of 45.1% of adolescents reported lifetime use (ever use) of waterpipes and 34.2% had ever shared a waterpipe. In multivariate logistic regression analysis the significant correlates of current waterpipe use for both males and females were having smokers among friends and family members, while for males, older age and educational failure were also risk factors.
Related Concept Videos
Pipe Flowrate Measurement
The orifice meter is a simple,...
General Characteristics of Pipe Flow I
The classification of fluid...
General Characteristics of Pipe Flow II
The distance to reach a fully developed flow is called the entrance length and depends on the...
Design Example: Designing a Residential Plumbing System
Major Losses in Pipes
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to...
Cross-Sectional Research

