One of the first signs that a somebody has Alzheimer's is that they'll get lost. E.g., they've been attending church on Thursdays nights at the same chapel for 15 years, but suddenly they forgot how to get home after a recent service. Part of the reason for the findings in the current study is that people quit those professions when they feel themselves starting to struggle.
Is the profession cached in the data when they leave the job? And does the data attribute 2 entries for someone with 2 careers. That’s the question I think
A friend of my wife's suffered a stroke recently. One of the first signs something was really wrong was she took a circuitous route around town to get home, then called her husband and said "I'm lost, I don't know where I am". She was parked in her own driveway.
Yeah my mom would slowly forget how to get to my house, it was sad she would always try but just not quite get it... She eventual died of Alzheimer's a some years later...