> The people who were the most satisfied in their relationships at age 50 were the healthiest at age 80 Most probably the people who were already sick at age 5

> The people who were the most satisfied in their relationships at age 50 were the healthiest at age 80 Most probably the people who were already sick at age 50 were in a "less" satisfied relationship, on account of the fact that sickness is never a good conduit for having a happy love life. So of course that those people most probably went on to have a worse health at age 80 (because they were already sick by age 50) compared to people who had had been healthier (and happier, partly because healthier) at age 50.