Extended Data Fig. 9: STARD diagram of low-dose-screening CT patients from an academic medical center used for the independent validation test set.
![Extended Data Fig. 9](https://cdn.statically.io/img/media.springernature.com/full/springer-static/esm/art%3A10.1038%2Fs41591-019-0447-x/MediaObjects/41591_2019_447_Fig13_ESM.png)
We require a minimum of 1 year of follow-up for cancer-negative cases. This resulted in a median follow-up time of 625 d across all patients once all exclusion criteria were taken into account. To clarify, this means that the median amount of time from the first screening CT to either a cancer diagnosis or the last follow-up event was 625 d. There were 209 patients (232 cases) with priors in this set of 1,139.