Rate ratios comparing age- and sex-standardized computed tomography rate estimates in adjacent years
| Year comparison | Rate ratio* (95% CI) |
|---|---|
| 2014 to 2013 | 1.137 (1.084–1.194) |
| 2015 to 2014 | 1.117 (1.067–1.169) |
| 2016 to 2015 | 0.896 (0.857–0.938) |
Note: CI = confidence interval.
↵* Calculated by dividing the more recent year by the previous year.