At first glance most people would say they would prefer short dialysis treatment sessions. But a recent research paper says that for older people, a longer session increases how long they will survive with the disease.
This was a retrospective cohort study of people who first commenced thrice-weekly haemodialysis aged ≥65 years, reported to the Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry from 2005 to 2015, included from 90 days after dialysis start. The primary outcome was all-cause mortality. Cox regression analysis was performed with haemodialysis session duration the exposure of interest.
They found that longer dialysis hours per session was associated with a decreased risk of death - and for people over the age of 65, that is a good result.
You can read the abstract online here https://pubmed.ncbi.nlm.nih.gov/36401820/ There are some mathematical statements about how the study was assessed, but the important thing is the work says longer individual sessions are better for older patients.
