Table 1.
Demographic Description of the 6 External Validation Datasets
| Demographic Variables | Seoul National University Hospital Dataset | Boramae Medical Center Dataset | Kyunghee University Hospital at Gangdong Dataset | Daejeon Eulji Medical Center Dataset | Montgomery Dataset | Shenzhen Dataset |
|---|---|---|---|---|---|---|
| Patients with TB | ||||||
| Number of patients | 83 | 70 | 103 | 70 | 52 | 320 |
| Gender (male:female) | 52:31 | 42:28 | 66:37 | 47:23 | 32:20 | 220:100 |
| Age (years)a | 59 (17–88) | 59 (25–94) | 51 (15–93) | 50 (20–86) | 48 (15–89) | 34 (2–89) |
| Mode of diagnosis (culture:polymerase chain reaction only) | 68:15 | 35:35 | 95:8 | 70:0 | U/A | U/A |
| Time interval between diagnosis and CR (days)a | 4 (0–14) | 2 (0–13) | 3 (0–30) | 2 (0–31) | U/A | U/A |
| Time interval between CR and CT (days)a | 7 (0–29) | 1 (0–28) | 3 (0–29) | 0 (0–7) | U/A | U/A |
| Total number of TB lesions on CR | 132 | 145 | 191 | 231 | 82 | 493 |
| Location of TB lesion (right:left:bilateral) | 36:12:35 | 26:8:36 | 34:20:49 | 22:10:38 | 17:16:19 | 126:69:125 |
| Patients without TB | ||||||
| Number of patients | 100 | 70 | 70 | 100 | 80 | 326 |
| Gender (male:female) | 49:51 | 24:46 | 26:44 | 45:55 | 25:59b | 220:106 |
| Age (years)a | 55 (25–80) | 54 (28–86) | 49.5 (15–73) | 44 (19–86) | 33.5 (4–70) | 31 (0–85) |
| Time interval between CR and CT (days)a | 0 (0–16) | 0 (0–13) | 4 (0–15) | 0 (0–20) | U/A | U/A |
Abbreviations: CR, chest radiograph; CT, computed tomography; TB, tuberculosis; U/A, unavailable.
aData are median values (range).
bInformation for 1 case was unavailable.