The study, entitled "What's Love Got to Do With It," tracked nearly 2,500 couples -- married or living together -- from 2001 to 2007 to identify factors associated with those who remained together compared with those who divorced or separated.

One out of the seven facts...

It found that a husband who is nine or more years older than his wife is twice as likely to get divorced, as are husbands who get married before they turn 25.

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