Six hundred and fifty-four men had their bone mineral content (BMC) measured with single photon absorptiometry during 1970-1976. All roentgenograms 1975-1985 (11 years) were registered and thus all falls requiring roentgen examinations. BMC was found to be of predictive value in ages below 70-80 with regard to future fragility fractures. Other characteristics were more falls, less grip strength, and weight. A history of previous vertebral fracture and cerebral disorder were also predictive. Men with only nonfragility fractures showed no differences compared to the nonfracture population.