"Hikers completed their trips in an average of 15.2 days (SD=7.6) and travelled an average of 169 miles (SD=80.4 miles). IN OTHER WORDS, NOT ALL OF THEM COMPLETED THE FULL JMT, so that skews the number-of-days- results

I had nothing to do with this retrospective study, but there was also selection bias. This was not a representative cohort of who hikes the JMT. It was a cohort of those that chose to respond. I suppose with a large enough n- number that the two groups (volunteered data vs all hikers) look more and more similar.

The other surprising statistics was that 93% of responders completed all of the data asked of them. That is unheard of in my experience.

This was published as only an abstract, so I do not have any other info, and did not attend the conference where more may have been available.