4/ Why is this a problem? Because every firearm injury in the U.S. is a failure of public health, particularly accidental ones. Can't make progress if we don’t actually know case numbers, who they are happening to, etc. Nonfatal cases like this abound: https://pittsburgh.cbslocal.com/2020/11/16/toddler-taken-to-hospital-after-apparent-accidental-shooting/
5/ To overcome this problem, we combined data collected from death certificates with a newer, much larger data source, the Nationwide Emergency Department Sample, which collects data from 900-1000 ERs per year (10 times the sample size), providing much more stable estimates
6/ The key findings:

From 2009-17 there was an average of 120,234 cases of firearm injuries per year, or 329 per day.

In the most recent year of data (2017), there were 138,725 cases of firearm injury. This is 380 per day, with 109 deaths and 271 people who go onto survive
7/ While suicide has been known to be the leading cause of firearm deaths, our data show once nonfatal injuries are counted, that assault injuries are the leading cause of firearm injuries (39%), followed by unintentional injuries (37%)
8/ Combining fatal and nonfatal injury counts, we now see a more complete picture of the firearm injury rates by urban vs. rural geography and by age. The hidden burden of unintentional injuries now becomes clear, particularly in rural areas and among children and young adults
9/ We find that roughly 3 out of 4 deaths occur outside the hospital, with suicide accounting for the vast majority of these cases. Of those who make it to the hospital, 93% go on to survive. Here’s some twitter only content that didn’t make it in the paper breaking this down
10/ Think about the focus on pinpointing a #COVID19 case fatality rate (CFR). Think about all we know about every type of cancer. With these data, we can now provide CFRs by firearm injury mechanism

Self-harm: 89.4%
Assault: 25.9%
Legal intervention: 23.4%
Unintentional: 1.2%
11/ This has been shown numerous times before, but there are marked racial/ethnic differences in fatalities with young Black and Latino males making up a disproportionate share of those who die in firearm assaults and middle age/older White men making up the majority of suicides
12/ Examining the data on patients who survive after emergency care, we find extremity injuries are the most common serious injury, followed by chest and abdominal. Hospitalizations last on average 4 days, with 25% lasting 9 days or more. 19% underwent major operations
15/ I honestly can’t remember the last time we had an ER shift without a gunshot victim. It's always been bad, but now it's worse. It's stuff like this that shakes you to the core https://twitter.com/kit_delgadoMD/status/1296634626895761408?s=20
17/ You can support research and education aimed at developing and implementing public health approaches to prevent firearm injury via @ResearchAFFIRM https://affirmresearch.org/ 
22/ And we can use "hot spotting" to learn from counties that have successfully reduced firearm injury deaths rates and contrast them with counties in which death rates have increased to inform prevention polices as we’re doing in our ongoing research https://www.cceb.med.upenn.edu/WiebeGunResearch
You can follow @kit_delgadoMD.
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