Parachute use to prevent death and major trauma when jumping from aircraft: randomized controlled trial

To determine if using a parachute prevents death or major traumatic injury when jumping from an aircraft. Randomized controlled trial. Private or commercial aircraft between September 2017 and August 2018. 92 aircraft passengers aged 18 and over were screened for participation. 23 agreed to be enrolled and were randomized. Jumping from an aircraft (airplane or helicopter) with a parachute versus an empty backpack (unblinded). Composite of death or major traumatic injury (defined by an Injury Severity Score over 15) upon impact with the ground measured immediately after landing. Parachute use did not significantly reduce death or major injury (0% for parachute 0% for control; P>0.9). This finding was consistent across multiple subgroups. Compared with individuals screened but not enrolled, participants included in the study were on aircraft at significantly lower altitude (mean of 0.6 m for participants mean of 9146 m for non-participants; P