Theme1 – Spatial‑navigation skill may protect against Alzheimer’s
“The connection is believed to be the spatial reasoning involved in routing.” – fn‑mote
“Those with spatial reasoning are less likely to develop Alzheimer’s.” – jojobas
Theme 2 – Selection/survivorship bias is a major alternative explanation > “Firstly and perhaps most importantly, selection bias is possible because individuals who are at higher risk of developing Alzheimer’s disease may be less likely to enter or remain in memory‑intensive driving occupations such as taxi and ambulance driving.” – Melatonic
Theme 3 – Methodological concerns and other variables are frequently raised
“I’m a little skeptical of the category ‘ambulance drivers; not emergency medical technicians’ as reliably coded, because people will often say so‑and‑so ‘drove an ambulance’ when they were actually an EMT or paramedic.” – smelendez
“But the first massively popular 3D games started at the end of the 90s, which means Alzheimer cases for them will pop up only around 2060 or later.” – hamstergene