Across all suicide attempts not involving a firearm, less than 5 percent will result in death.

Miller M., Azrael, D., & Barber C. “Suicide mortality in the United States: the importance of attending to method in understanding population-level disparities in the burden of suicide”. Annual Review of Public Health, (2012). https://doi.org/10.1146/annurev-publhealth-031811-124636