Very well. If, among the general population, you were to take 1,913 men, 90% of whom are 81 years of age, the number of falls would be the same. Among the general population, there are more women among the 81-year-old segment. And, at this time, the men are the ones who have the greater number of falls. Therefore, you cannot say that falling is more common among veterans than among men who are, on average, 81 years old.
That's the part of your study that I don't understand.