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91��Ƭ�� Professor, MSD Senior Collaborate on Homicide Trends

Rebecca P. Schneid, 17, a senior at MSD High School, shooting survivor and aspiring physician, and Charles H. Hennekens, M.D., Dr.PH, senior author, Sir Richard Doll Professor and senior academic advisor in 91��Ƭ��’s Schmidt College of Medicine.

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The vast majority of homicides in the United States are attributable to firearms. The rate of homicide due to guns is about 25 times higher in the U.S. than many other high-income countries. In the U.S., there are approximately 357 million guns among a population of about 323 million. Guns are present in about 1 in 3 households. In addition, gun-related suicide rates in the U.S. are about eight times higher than other high-income countries.

For decades, there have been striking regional variations in deaths from homicide. Professors from 91��Ƭ��’s  , as well as  , and a high school senior, shooting survivor and aspiring physician from in Parkland, Fla., set out to explore secular trends in homicide rates by comparing two “peer” cities, namely Baltimore and New York City.   

The study, published in , demonstrates that, since the 1990s, homicide rates in Baltimore City remained high while those in New York City declined dramatically. These trends were evident among both whites and blacks although blacks had higher absolute rates.

Collaborators are , M.D., Dr.PH, senior author, Sir Richard Doll Professor and senior academic advisor in 91��Ƭ��’s College of Medicine; Robert S. Levine, M.D., first author and a professor at Baylor College of Medicine; Rebecca P. Schneid, 17, a senior at MSD, and Roger J. Zoorob, M.D., M.P.H., the Richard M. Keibert, Sr. professor and chair, Department of Family and Community Medicine at Baylor College of Medicine.

“The root causes for the marked differences in homicide rates between Baltimore and New York as well as among blacks and white are complex and likely to be multifactorial,” said Hennekens.  “This ‘Tale of Two Cities,’ if better understood, might point the way to the abolition of the ‘worst of times’ for Baltimore as well as many other U.S. cities as they seek to reduce their own high homicide rates.”

The authors believe that the data from this study raise several major clinical and contemporary medical policy issues.

“Contextual social disadvantage has been associated with increased homicide rates in U.S. cities,” said Levine. “The successes in New York City did not happen overnight and occurred despite persistent poverty and skyrocketing income inequalities.”

The homicide rates in Baltimore and New York City were so markedly different from the 1990s to 2016 despite the fact that they were so similar in the 1980s, even though the U.S. Centers for Disease Control and Prevention (CDC) defined the two cities as “peers” according to 19 population based characteristics, which included population size, median household income, overall poverty, percent foreign born, and unemployment.

“Physicians relentlessly pursue improving the health and well-being of every single one of their patients,” said Schneid. “As an aspiring physician and a survivor of the horrific shooting at Marjory Stoneman Douglas High School, I believe that preventive medicine specialists as well as public health officials can only protect the health of the public with the assistance of our political and community leaders.” 

These descriptive findings derived from the Wide-ranging Online Data for Epidemiologic Research (WONDER) data provided by the CDC included overall and race specific (white and black) mortality from homicide from birth to 85 plus years of age based on underlying cause of death obtained from death certificates.

“I believe that combatting the epidemic of homicides from firearms without addressing firearms is like combatting the epidemic of lung cancer from cigarettes without addressing cigarettes,” said Hennekens.

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