people who had less than 4% elevated risk composed 2.5% of the group, and people who had over 67% elevated risk composed 2.5% of the group if normally distribu

people who had less than 4% elevated risk composed 2.5% of the group, and people who had over 67% elevated risk composed 2.5% of the group if normally distributed, two thirds would have elevated risk between 14% and 48% that is to say, almost everyone has an elevated risk - so I have no idea why you are complaining about confidence intervals