I would have been interested in the separate results for married vs not-married biological parents. But married people do not always get quality care from their spouse, and sometimes they do not get any care at all. And single people, who do not just prioritize a spouse or romantic partner, often have more people in their social networks, and are more resilient because of that. http://www.amazon.com/How-We-Live-Now-Redefining-ebook/dp/B00P4348IS/?tag=wwwbelladepau-20