[avar]

Studies like this don't provide good data points for "if you jump[...]" as the GP mentioned. The data is gathered from people who either accidentally fell, or intentionally jumped not intending to live.

They can't just randomly recruit people and have them jump to their near-certain deaths from ever increasing heights due to pesky medical ethics boards.

This matters because a person who's forced to jump from a significant height out of desperation (e.g. to avoid a fire) is likely to take certain precautions that people who accidentally fall don't take, and those trying to kill themselves intentionally avoid.