Table 1.
Patient characteristics of each cohort.
| Pretraining set | Utility set | Test set | |||
|---|---|---|---|---|---|
| Principal | Supplemental | Training | Validation | ||
| (n = 53) | (n = 15) | (n = 126) | (n = 54) | (n = 51) | |
| Age (SD) | 59.57 (11.91) | 66.2 (7.55) | 63.27 (7.15) | 60.30 (11.18) | 59.33 (10.74) |
| Sex | |||||
| Male (%) | 31 (58.5) | 14 (93.3) | 74 (58.7) | 34 (55.6) | 31 (60.8) |
| Female (%) | 22 (41.5) | 1 (6.7) | 52 (41.3) | 20 (37.0) | 20 (39.2) |
| Sampling year | 2014–2020 | 2016–2020 | 2009–2015 | 2009–2015 | 2016–2018 |
| Sampling modality | |||||
| SLB | 49 | 15 | 126 | 54 | 51 |
| TBLC | 3 | 0 | 0 | 0 | 0 |
| TBLB | 1 | 0 | 0 | 0 | 0 |
| UIP cases, n (%) | n/a | n/a | 78 (61.9) | 27 (50) | 26 (52) |
| Follow up time, days (SD) | n/a | n/a | 1430.9 (469.1) | 1267.9 (461.7) | n/a |
| Event, death (%) | n/a | n/a | 29 (23.2%) | 12 (23.1%) | n/a |
SD standard deviation, SLB surgical lung biopsy, TBLC transbronchial lung cryobiopsy, TBLB transbronchial lung biopsy, UIP usual interstitial pneumonia, n/a not applicable.