CDC Releases New Report on Indoor Secondhand Smoke Exposure

Four out of five U.S. adults report having voluntary smoke-free rules in their homes and three out of four report having voluntary smoke-free rules in their vehicles, according to a study published in the journal Preventing Chronic Disease, a publication of the Centers for Disease Control and Prevention (CDC). The study, entitled “Smoke-Free Rules and Secondhand Smoke Exposure in Homes and Vehicles among US Adults, 2009–2010” is the first to present estimates of smoke-free rules and secondhand smoke exposure in vehicles among U.S. adults. 

The National Adult Tobacco Survey respondents were classified as having smoke-free rules if they never allow smoking inside their homes or vehicles. Despite the high prevalence of voluntary smoke-free rules in homes and vehicles, the study found that almost 11 million non-smoking adults continue to be exposed to secondhand smoke in their home, and almost 17 million non-smoking adults continue to be exposed to secondhand smoke in a vehicle. The study also contains state-by-state data showing that the highest prevalence of smoke-free rules in homes and vehicles occurred in many states with comprehensive smoke-free laws and longstanding tobacco control programs. 

“We have made tremendous progress in the last 15 years protecting people in public spaces from secondhand smoke,” said Tim McAfee, M.D., M.P.H., director of the Office on Smoking and Health at CDC, in a news release. “The good news is that people are applying the same protection in their homes and vehicles. However, millions of non-smokers, many of whom are children, remain exposed to secondhand smoke in these environments.” 

Exposure to secondhand smoke causes heart disease and lung cancer in adult non-smokers. In children, secondhand smoke exposure causes more severe and frequent asthma attacks, acute respiratory infections, ear infections and sudden infant death syndrome (SIDS). Secondhand smoke exposure is responsible for an estimated 50,000 deaths each year in the United States. The Surgeon General has concluded there is no safe level of exposure to secondhand smoke, and that only 100 percent smoke-free policies can protect non-smokers from the dangers of secondhand smoke. Opening a window does not work, nor does any other ventilation system. 

The online version of the article is available at http://www.cdc.gov/pcd/.

Study Finds Early Alcohol Use Increases Alcohol Abuse Later in Life

The earlier the age at which youth take their first alcoholic drink, the greater the risk of developing alcohol problems, Medical News Today reported.

A new study that will be published in the October issue of Alcoholism: Clinical & Experimental Research shows that individuals who have their first drink during puberty subsequently have higher drinking levels than do individuals with a post-pubertal drinking onset.

"Most teenagers have their first alcoholic drink during puberty, however, most research on the risks of early-onset alcohol use up to now has not focused on the pubertal stage during which the first alcoholic drink is consumed," said Miriam Schneider, leader of the Research Group Developmental Neuropsychopharmacology at the Central Institute of Mental Health, University of Heidelberg, as well as corresponding author for the study.

"Common thinking in alcohol research was that the earlier adolescents begin, the more deleterious become their drinking habits. However, a closer look at the statistics revealed a peak risk of alcohol use disorders for those beginning at 12 to 14 years of age, while even earlier beginners seemed to have a slightly lower risk. Since timing of puberty is not a simple function of chronological age, and also greatly differs between the sexes, the pubertal phase at first drink may therefore represent a stronger and better indicator for subsequent alcohol-related problems than simply the age."

The longitudinal epidemiological study involved Schneider and her colleagues determining pubertal age at first drink in 283 young adults (152 females, 131 males) that were part of a larger epidemiological study. In addition, the participants' drinking behavior - number of drinking days, amount of alcohol consumed, and hazardous drinking - was assessed at ages 19, 22, and 23 years via interviews and questionnaires. Furthermore, a rodent study concurrently examined the effects of mid-puberty or adult alcohol exposure on voluntary alcohol consumption in later life by 20 male rats.

Both studies revealed that those individuals that initiated alcohol consumption during puberty tended to drink more and also more frequently than those starting after puberty, Schneider wrote in the study.

Researchers noted the influence of a high degree of brain development that occurs during puberty.

"In summary, puberty is a very critical developmental period due to ongoing neurodevelopmental processes in the brain. It is exactly during puberty that substances like drugs of abuse - alcohol, cannabis, etc. - may induce the most destructive and also persistent effects on the still developing brain, which may in some cases even result in neuropsychiatric disorders, such as schizophrenia or addictive disorders. Prevention work therefore needs to increase awareness of specific risks and vulnerability related to puberty,” Schneider told Medical News Today.

Teen Smokers May Be At Greater Risk Of Marijuana Addiction

New research presented at the Pediatric Academic Societies annual meeting in Washington, D.C., supports the theory that cigarettes are a gateway drug to marijuana.

"Contrary to what we would expect, we also found that students who smoked both tobacco and marijuana were more likely to smoke more tobacco than those who smoked only tobacco," said study author Megan Moreno, MD, MSEd, MPH, FAAP, an investigator at Seattle Children's Research Institute and associate professor of pediatrics at the University of Washington, in a news release printed in Medical News Today.

Dr. Moreno and her colleagues randomly selected incoming college students from two universities - one in the Northwest and one in the Midwest - to participate in the longitudinal study. Students were interviewed prior to entering college and again at the end of their freshman year regarding their attitudes, intentions and experiences with substances.

Specifically, students were asked if they had used tobacco or marijuana ever in their lives and in the past 28 days. Researchers also assessed the quantity and frequency of marijuana and tobacco use in the past 28 days.

Results showed that prior to entering college, 33 percent of the 315 participants reported lifetime tobacco use, and 43 percent of lifetime users were current users. In addition, tobacco users were more likely to have used marijuana than those who did not use tobacco.

By the end of their freshman year, 66 percent of participants who reported tobacco use prior to entering college remained current users with an average of 34 tobacco episodes per month. Of these, 53 percent reported concurrent marijuana use. Overall, users of both substances averaged significantly more tobacco episodes per month than current users of tobacco only.

"These findings are significant because in the past year we have seen legislation passed that legalizes marijuana in two states," Dr. Moreno said. "While the impact of these laws on marijuana use is a critical issue, our findings suggest that we should also consider whether increased marijuana use will impact tobacco use among older adolescents."

Research Shows Early Dialogue Between Parents and Children Most Effective In Deterring Teen Tobacco, Alcohol Use

Early, substantive dialogue between parents and their grade-school age children about the ills of tobacco and alcohol use can be more powerful in shaping teen behavior than advertising, marketing or peer pressure, a University of Texas at Arlington marketing researcher has shown.

The findings of Zhiyong Yang, an associate professor of marketing in the UT Arlington College of Business, are published in a recent edition of the Journal of Business Research. Similar findings were part of a 2010 study he published in the Journal of Public Policy & Marketing of the American Marketing Association.
Yang's current work, "Demarketing teen tobacco and alcohol use: Negative peer influence and longitudinal roles of parenting and self-esteem," argues that parental influence is a powerful tool in dissuading children from smoking and drinking in their later teen years.

His 2010 article, "The Impact of Parenting Strategies on Child Smoking Behavior: The Role of Child Self-Esteem Trajectory," shows that dialogue between parents and teens is effective in combating risky behavior, such as tobacco and alcohol use, and that parental influences buffer the impact of other external factors such as social media and peer pressure.

"First, our conclusion is that parenting styles can be changed, and that's good news for the parents and the teens," Yang said, in a news release. "Second, our study shows that parental influence is not only profound in its magnitude, but also persistent and long-lasting over the course of a child's entire life. Effective parenting plays the critical role as a transition belt to pass normative values of society from one generation to another."

Rachel Croson, Dean of the UT Arlington College of Business, said Yang's research sheds important light on what drives behaviors and misbehaviors.

"Marketers often study how to sell more products," Croson said. "Dr. Yang's work answers some important and thorny questions about how to sell less, and what parents may be able to do to help improve their children's health and well-being."