Table 1.
Characteristics of enrolled patients and collected CT scans for model development and validation.
| Overall | Training and validation set (n = 199) | Internal test set (n = 94) | External test set (n = 93) | |||
|---|---|---|---|---|---|---|
| COVID-19 | CAP | COVID-19 | CAP | COVID-19 | CAP | |
| Patients (CT scans) | 72 (137) | 127 (131) | 26 (33) | 68 (70) | 31 (33) | 62 (62) |
| Age (range) | 42.0 ± 13.6 (3–78) | 38.1 ± 14.4 (3–80) | 42.7 ± 14.0 (15–72) | 40.1 ± 19.4 (5–94) | 47.5 ± 18.7 (17–85) | 42.1 ± 27.4 (2–93) |
| Male | 32 (68) | 72 (75) | 14 (18) | 42 (44) | 16 (16) | 42 (42) |
| Female | 40 (69) | 55 (56) | 12 (15) | 26 (26) | 15 (17) | 20 (20) |
| Jinan Infectious Disease Hospital (n = 152, scan# = 228) | ||||||
| Patients (CT scans) | 41 (106) | 75 (78) | 19 (26) | 17 (18) | – | – |
| Age | 39.8 ± 13.6 (3–72) | 35.6 ± 11.6 (20–79) | 40.7 ± 11.8 (26–72) | 33.1 ± 13.6 (5–65) | – | – |
| Male | 22 (55) | 48 (51) | 10 (14) | 12 (13) | – | – |
| Female | 19 (51) | 27 (27) | 9 (12) | 5 (5) | – | – |
| Beijing Haidian Hospital (n = 141, scan# = 143) | ||||||
| Patients (CT scans) | 31 (31) | 52 (53) | 7 (7) | 51 (52)a | – | – |
| Age | 44.8 ± 13.3 (17–78) | 41.7 ± 17.1 (3–80) | 48.1 ± 18.7 (15–67) | 42.4 ± 20.6 (14–94) | – | – |
| Male | 13 (13) | 24 (24) | 4 (4) | 30 (31) | – | – |
| Female | 18 (18) | 28 (29) | 3 (3) | 21 (21) | – | – |
| Inner Mongolia Autonomous Region People's Hospital (n = 93, scan# = 95) | ||||||
| Patients (CT scans) | – | – | – | – | 31 (33) | 62 (62) |
| Age (years) | – | – | – | – | 47.5 ± 18.7 (17–85) | 42.1 ± 27.4 (2–93) |
| Male | – | – | – | – | 16 (16) | 42 (42) |
| Female | – | – | – | – | 15 (17) | 20 (20) |
aInclude previously collected pathologically confirmed influenza pneumonia (20 cases) and mycoplasma pneumonia (18 cases) which serves as independent test data.