Methods: Data came from the 2024 Korea Youth Risk Behavior Survey of 54,653 students. Main analyses included 992 current cigarette-only, e-cigarette-only or dual users.
Results: Longer daily e-cigarette use and dual use were significantly associated with higher GAD-7 anxiety scores. Duration of cigarette-only use was not significantly associated in the same way.
Additional finding: Negative health perception showed statistically significant but small indirect effects.
Limitation: The cross-sectional design and modest effect sizes mean that causation cannot be established.
Methods: Male and female rats were exposed to emissions from cigarettes, JUUL e-cigarettes, IQOS heated tobacco, marijuana cigarettes, cannabinoid-depleted marijuana cigarettes or clean air.
Findings: Single exposures to some products impaired measures of cardiac function. Repeated exposure to several products increased platelet aggregation. Four weeks of repeated tobacco or marijuana exposure before experimentally induced myocardial infarction was associated with greater infarct size.
Important limitation: This was an animal experiment. The results help identify possible mechanisms but do not directly measure cardiovascular outcomes in people.
Purpose: The researchers developed and evaluated a self-report battery for variables that may influence response to transcranial photobiomodulation.
Measures: The battery incorporates established measures of sleep quality, e-cigarette dependence, smoking intensity, skin tone and wellbeing, along with measures of hair characteristics.
Findings: Face and content validity met recommended thresholds, internal consistency was acceptable across adapted subscales, and lifestyle measures showed meaningful associations with global health outcomes.
Source context: All authors disclosed a professional affiliation with Neuronic Corporation, which develops and commercialises photobiomodulation technology.
Purpose: The study investigated whether short-term and prolonged exposure to zero-nicotine e-cigarette aerosol affects blood-brain barrier integrity.
Methods: Researchers used an in-vitro blood-brain barrier cell model and male and female mice exposed to zero-nicotine aerosol.
Findings: In laboratory models, prolonged exposure reduced measures of barrier integrity and increased permeability. In mice, 14-day exposure reduced some tight-junction proteins and increased several inflammatory cytokines, while seven-day exposure did not show the same significant changes.
Important limitation: These are laboratory and animal findings and should not be interpreted as direct evidence of the same health effects in humans.
Publication type: This article is published as a Viewpoint in the European Journal of Preventive Cardiology.
Topic: It addresses e-cigarette use, cardiovascular consequences and implications for preventive cardiology. The indexed keywords include cardiovascular prevention, electronic nicotine delivery systems, nicotine, tobacco control and vaping.
Limitation: PubMed does not provide an abstract. Detailed claims about cardiovascular effects or recommendations have therefore not been added beyond the information available in the indexed record.
Methods: A structured search of five databases identified 22 studies, including randomized trials, quasi-experimental studies, observational studies and one quality-improvement project.
Findings: The review describes respiratory effects associated with e-cigarette use, including lung injury and an increased possibility of ventilatory complications.
Clinical relevance: The author recommends targeted preoperative screening that considers vaping status, level of use, behaviour and nicotine concentration.
Conclusion: Perioperative management may need to be tailored to the physiological changes associated with e-cigarette use.
Purpose: The researchers examined how often e-cigarette smoking-cessation trials report continued use of both e-cigarettes and combustible cigarettes.
Methods: Seventy-one eligible peer-reviewed trials from a recent Cochrane review and meta-analysis were assessed.
Results: 57 trials did not report dual-use prevalence, one allowed it to be derived and 12 reported it directly. Reported prevalence ranged from 6.6% to 89.5%, with a mean of 42.6% at four weeks.
Conclusion: Dual use is reported infrequently and inconsistently, which limits interpretation of smoking-cessation and public health outcomes.
Available information: PubMed lists this article in Archives of Disease in Childhood, volume 111, issue 9, page 816.
Limitation: No abstract is available and no authors are listed in the PubMed record.
Important: Because detailed evidence is unavailable in the PubMed record, this explainer does not claim a causal or confirmed association between vaping and sudden unexpected death in infancy.