Merely getting older doesn't make mental health problems more likely to occur, Rabins said, noting that middle age is the most common time for onset of depression.

MSN: Boomers will be in need of mental health care, report finds

For example, up to a third of people who require long-term steroid treatment develop mood problems that may require someone knowledgeable about both the medical and mental health issues to determine whether it's best to cut back the steroids or add an antidepressant, Rabins said.

MSN: Boomers will be in need of mental health care, report finds