Yes. She said that a person in Chicago was twice as likely to be killed as a soldier in Afghanistan. In fact, her discussion on this served as the bulk of any stats related discussion in her presentation.
Gun types invariably struggle with the denominator. It’s why they always want to compare guns with pools, baseball bats, bicycles, alcohol. It’s the denominator, stupid.
In this case, I’m not going to take the time to calculate actual person-years of exposure to risk. We’ll just have to make do with a rough estimate based on the population at a point in time. I looked up the population of Chicago (2,707,120), and the peak number of troops in Afghanistan (187,900). Using the peak number of troops in Afghanistan makes the comparison more favorable in the young woman’s direction; the actual number over the years she indicated would be lower.
We will take her figures on deaths to illustrate the point. She gave a figure of 4,265 killed in Chicago (she also gave the number of people shot, which would be more relevant to the gun issue, but we’ll use her figure for “killed” since we’re evaluating her claim of being twice as likely to be killed). This leaves us with 2,702,855 not killed.
She said 2,166 were killed in Afghanistan (or the “Afghani war” as she kept calling it), leaving 185,734 not killed.
The odds ratio (4,265/2,702,855)/(2,166/185,734) is 0.13 (95% CI = .1285 - .1425 ;), p value < .0001). This suggests that you were nearly 90% less likely to be killed in Chicago as was a soldier in Afghanistan.