How much of this is controlled for other variables? Maybe people who are more active, more engaged, and have more reasons to take care of themselves also are mo

How much of this is controlled for other variables? Maybe people who are more active, more engaged, and have more reasons to take care of themselves also are more likely to drink several cups of coffee to give them a boost toward those goals. Staying active and engaged is probably pretty important to your health especially as you get older.