Too many or too few unintentional firearm deaths in official U.S. mortality data?

▶ Official mortality data on unintentional firearm deaths are inaccurate and over-report cases. ▶ In linked data, 42% of the deaths identified by the ICD-10 Underlying Cause of Death code as firearm accidents were false positives. ▶ The ICD-10 data also missed 38% of true cases. ▶ National Violent Death Reporting System data had both high sensitivity (98%) and positive predictive value (99%).