GAINESVILLE, Fla. – The gender gap in youth suicide is smaller than previously estimated, according to a new University of Florida study that found suicide mortality rates among females ages 10 to 19 have been underestimated, while rates among males have been overestimated. The findings appear in JAMA Network Open Psychiatry.
"The reduced gender gap in suicide is a surprise," said the study's lead author, Bin Yu, who holds a mater's degree in public health and is a doctoral student in epidemiology in UF's College of Public Health and Health Professions and College of Medicine. "It is really important that we not underestimate the risk of suicide among girls."
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Based on the UF findings, the male-to-female gender gap in suicide among adolescents has been reduced from 3-to-1 to 2-to-1.
Previous studies reported the suicide mortality rate for young males as 7.4 per 100,000 males in 1999 and 10.7 per 100,000 males in 2017. The UF researchers' analysis found the adjusted suicide mortality rate among males was 4.9 in per 1,000 in 1999 and 8.7 per 1,000 in 2017. Among female youth, prior studies estimated the suicide mortality rate at 1.6 per 100,000 in 1999 and 3.5 per 1,000 in 2017. The UF team found the female youth adjusted suicide mortality rate was 1.7 per 1,000 in 1999 and 4.2 per 1,000 in 2017.
"The persistent suicide increase we see without a tendency to slow down underscores the need for an increased effort at all levels for youth suicide prevention, with a further strengthening of suicide prevention interventions aimed at girls," Yu said.
Yu and his doctoral program mentor, Dr. Xinguang "Jim" Chen, who holds a doctorate in X and is a professor of epidemiology in the UF College of Public Health and Health Professions and the UF College of Medicine, analyzed data from the U.S. Centers for Disease Control and Prevention's Wide-ranging Online Data for Epidemiologic Research for the years 1999 to 2017.
Conventional methods for estimating annual suicide mortality rates by gender have been confounded by factors of population, age and individuals' birth year. The UF study is the first study of its kind to use a powerful epidemiological method called age-period-cohort analysis to adjust both age and birth year from the year in which the suicides occurred. The method allows researchers to obtain the most accurate picture of suicide for youth in the United States, Yu said.
The UF study did not examine possible reasons why suicide rates increased over time among adolescents, although possible factors may include increases in substance abuse and social media exposure among youth, the researchers said.
"We will continue our efforts to examine the means by which young people commit suicide and investigate social factors that may explain the persistent increase in suicide," Yu said.