Being a single parent is bad for your health

According to a study done by Marcus Westin of Uppsala University, single parents have poorer health than married couples or couples living together. The results applied to both single moms and single dads, although single mothers were less likely to seek medical help when needed than single fathers (and both were less likely than their married counterparts). The studied seemed to show a strong link between the generally poorer health of single parents and the decreased social outlets they inevitably face as a result of being solely responsible for children. Marcus Westin believes that the solution lies in making it easier for single parents to get out and involved in civic and social activities.

That kind of makes sense, although I'm thinking stress probably has something to do with it too?