repeatedly wide ranging studies have shown that the number one most common factor in recovery is a supportive spouse.
My X used that study as a way to put pressure on me to come back to him because "odds for recovery are radically worse for people who don't have the support of their spouse." (I had to remind him that he no longer had a spouse.) I was kind of scratching my head over why on earth a therapist would tell a bunch of newly sober As that, given their (the As' ) tendency to put the burden to handle everything on their spouses/family anyway?