Parachute use when jumping from aircraft: randomized controlled trial [pdf]
bmj.com
bmj.com
2023 (267 points, 161 comments) https://news.ycombinator.com/item?id=36161175
2019 (53 points, 38 comments) https://news.ycombinator.com/item?id=22778832
2018 (370 points, 110 comments) https://news.ycombinator.com/item?id=18677508
Related (first reference of this study)
Parachute use to prevent death and major trauma related to gravitational challenge: systematic review of randomised controlled trials (2003) (110 points, 2012, 59 comments) https://news.ycombinator.com/item?id=4644463