The Los Angeles Times (1/4, Healy) reports that new research shows that “brain shrinkage” is “less pronounced” in older people whose diets “hew closely to the traditional diet of Mediterranean peoples,” which consists of “lots of fruits, vegetables, legumes, nuts and olive oil, little red meat and poultry, and regular, moderate consumption of fish and red wine.” Findings from this study and other similar ones “have established that following a Mediterranean diet is effective at driving down heart attack, stroke and premature death risks, and improving the health conditions…that raise those risks,” but researchers “are less sure of the particulars of how the diet promotes better health.”

Related Links:

— “Less shrinkage: This is your aging brain on the Mediterranean diet,”Melissa Healy, Los Angeles Times, January 4, 2017.

Reuters (1/4, Kelland) reports, “People who live near busy roads laden with heavy traffic face a higher risk of developing dementia than those living further away,” researchers found after analyzing “records of more than 6.5 million Ontario residents aged 20 to 85,” then mapping “residents’ proximity to major roadways using postal codes.”

CNN (1/4, Senthilingam) reports investigators “found that people living within 50 meters (164 feet) of” a major “road had a 7% greater risk of developing dementia.” The findings were published online in The Lancet.

According to MedPage Today (1/4, Bachert), the author of an accompanying editorial observed that “the study ‘opens up a crucial global health concern for millions of people.

Related Links:

— “Scientists link higher dementia risk to living near heavy traffic,”Kate Kelland, Reuters, January 4, 2017.

MedPage Today (1/3, Walker) reports, “Teens with a history of substance use, as well as substance use within their families and neighborhoods, had an increased risk of death by gun violence,” researchers found after identifying and analyzing “data from police and medical examiner’s reports in Philadelphia…from January 2010 to December 2012.”

The findings were published online Jan. 3 in JAMA Internal Medicine. The author of an accompanying editorial “said that these findings suggested violence prevention efforts should target substance use at multiple levels – the individual, the family, and the neighborhood.”

The authors of an invited commentary “argued that alcohol is a key modifiable factor driving homicides and recommended that healthcare providers use the Substance Abuse and Mental Health Services Administration tool, Screening, Brief Intervention, Referral and Treatment (SBIRT)” to identify and treat “treating substance use disorders in adolescents and young adults.”

Related Links:

— “Environment of Drug Use Ups Risk of Teen Gun Death,” Molly Walker, MedPage Today, January 3, 2017.

STAT (1/3, Thielking) reports investigators “at Harvard and Yale have” used a “mathematical model to predict potential victims of gun violence in Chicago.” After examining “Chicago police data from 138,163 individuals who were arrested between 2006 and 2014, nearly 10,000 of whom were also victims of gun violence,” researchers found that “in 63 percent of the shootings they studied…social contagion played a key role.” Their study was published online Jan. 3 in JAMA Internal Medicine.

HealthDay (1/3, Mozes) reports that “social networks” are “acting as a breeding ground for the spread of gun exposure and violence,” the study findings suggest. Study author Ben Green, PhD, a doctoral candidate at Harvard Law School, said, “Those at the highest risk of gun violence are the individuals with the most associates who have recently been shot.”

Related Links:

— “Gun violence spreads like an infectious disease, new research finds,” MEGAN THIELKING, STAT, January 3, 2017.

The Washington Post (1/3, Johnson) “Wonkblog” reports, “A new analysis” published Jan. 3 “in the Journal of the American Medical Association suggests that little has changed over the past three decades” when it comes to Federal funding of research into firearms as a “common cause of death and injury” in the US. Three decades ago, after “scouring a database of the research funded by the National Institutes of Health,” researchers at that time concluded that “a thorough review of research awards for 1983 failed to identify a single research project on the topic of firearm injuries.”

Now, the authors of the present study theorize that “if public health issues were funded based on their death toll, gun violence injuries would have been expected to receive about $1.4 billion in federal research funding over about a decade – compared with the $22 million that it actually got.” This time, investigators “didn’t limit their analysis to NIH; they used a database that contains projects funded by multiple federal agencies.”

Related Links:

— “The reasons we don’t study gun violence the same way we study infections,” Carolyn Y. Johnson, Washington Post, January 3, 2017.