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Dave-1066 t1_j28kzsf wrote

One conclusion would be that people who own pets tend to be more nurturing, people who are nurturing tend to be well liked and want to be part of a community, people who take an active part in their community tend to exercise more and have lower blood pressure, healthy blood pressure levels are shown to lower cognitive impairment and the risk of developing dementia.

In other words, this is a very broad network of factors.