Twenty-two percent of all admissions to U.S. hospitals in 2008 were for patients born the year that Franklin D. Roosevelt was first inaugurated President of the United States or earlier, according to the latest News and Numbers from the Agency for Healthcare Research and Quality.

Those who ranged in age from 75 to 84 years accounted for almost 14 percent of the 40 million admissions to U.S. hospitals that year, while patients age 85 and over made up another 8 percent.

Together these most senior of America's seniors accounted for 8.7 million hospital admissions in 2008 compared with the 5.3 million admissions of relatively younger seniors those between 65 and 74 years of age.

The federal agency also found that in U.S. hospitals in 2008:

-- Treating patients age 75 and older cost hospitals more than $92 billion, compared with $65 billion for patients ages 65 to 74.

-- People age 85 and older were more than twice as likely to be hospitalized as 65-to -74 year olds (577 versus 264 stays per 1,000 population). They were also nearly three times more likely to require nursing home or other type of long-term care after leaving the hospital.

-- Congestive heart failure was the number one reason for hospitalizing people age 85 and older 44 stays per 1,000 population. Other leading reasons were pneumonia, blood poisoning, urinary tract infections, and heart rhythm disorders 36, 27, 24, and 23 stays per 1,000 population, respectively.

-- For 75-to-84 year olds , the top five reasons for hospitalization per 1,000 population were: congestive heart failure (23 stays); pneumonia (20 stays); heart rhythm disorders (17 stays); blood poisoning ( 16 stays); and osteoarthritis (15 stays).

Source: Agency for Healthcare Research and Quality (AHRQ)