A statistical model that takes into account a variety of demographic characteristics indicates that three situational factors are most likely to distinguish the group of 24- to 34-year-olds living at home from their peers:

They are much less likely to be married.
They are less likely to be working full time and more likely to be unemployed or underemployed.
They are less likely to have graduated from college.

Being married is, by a large margin, the most important predictor of whether individuals between the ages of 24 and 34 live with their parents or have their own place. The vast majority of young adults living at home, 75%, are single and have never married, twice the rate among those of the same ages who are living on their own. A plurality, 46%, of those no longer living with their parents are married.