Notably, financial services behavior monitoring indicates things like being unable to remember your PIN.

The study analysed anonymised banking records from over 66,000 individuals. It compared 16,742 individuals who were registered for power of attorney (PoA) due to a loss of financial capacity with a control group of 50,226 matched individuals without reported capacity loss.

The results reveal that subtle but significant changes in financial behaviour—such as reduced spending on travel and hobbies, increased household bills, fewer online banking logins, and more frequent requests to reset PINs—begin to appear several years before individuals are formally identified as lacking financial capacity.

Less spend on travel, increased bills, weren’t the symptoms I was expecting. Those seem correlated to age.

But forgetting a 4 digit number makes sense.

In related news: “Privacy in the Brain: The Ethics of Neurotechnology”

Also related, surveillance of the heart reveals structural problems:

While ECGs have their uses, they also have limitations. “We were all taught in medical school that you can’t detect structural heart disease from an electrocardiogram,” Elias says.

Echocardiograms, which use ultrasound to obtain images of the heart, can be used to definitively diagnose valve disease, cardiomyopathy, pulmonary hypertension, and other structural heart problems that require medication or surgical treatment.

EchoNext was designed to analyze ordinary ECG data to determine when follow-up with cardiac ultrasound is warranted. The deep learning model was trained on more than 1.2 million ECG–echocardiogram pairs from 230,000 patients. In a validation study across four hospital systems, including several NewYork-Presbyterian campuses, the screening tool demonstrated high accuracy in identifying structural heart problems, including heart failure due to cardiomyopathy, valve disease, pulmonary hypertension, and severe thickening of the heart.