I would posit that workplace health is like all other longevity studies. The strength and long-term stability of social connections is by far the dominant factor in longevity, health, and life satisfaction. Isolation kills.
In today’s workplace, social connection is anathematic. Teams are physically distributed. Career progress happens only by leaving. Layoffs are preferred to re-tasking. Homophily is discrimination. Talking about your life with coworkers is a liability. Telling a joke or asking someone out on a date can get you fired. Set off the twitter rage machine and not only is your career over, but the company has a PR nightmare. There are no such things as friendships at work.