Table 1. Clinical information of the datasets used in this study.
| Dataset | Geographic region | Male/female | Age (years, mean ± SD) | Number of non-pathological/non-COVID pneumonia/COVID-19 patients |
|---|---|---|---|---|
| RSNA Pneumonia Challenge | North America | NA | NA | 1,125/100/0 |
| RICORD-1c | North America | 208/143 | 55±18 | 0/0/996 |
| JSRT (all) | Japan | 116/125 | 58±14 | 93/NA/NA |
| JSRT (for bone suppression) | Japan | 104/113 | NA | 86/NA/NA |
| Hong Kong Hospitals (all) | Hong Kong (China) | 260/264 (QEH); 280/284 (PYNEH) |
46±22 (QEH); 57±25 (PYNEH) |
0/0/524 (QEH); 564/0/0 (PYNEH) |
| Hong Kong Hospitals (for external test set) | Hong Kong (China) | 152/168 (QEH); 265/253 (PYNEH) |
NA | 0/0/320 (QEH); 518/0/0 (PYNEH) |
The authors could not identify the age and sex information of the subjects in the RSNA Pneumonia Challenge dataset. All patients in the JSRT dataset who were not non-pathological had lung nodules. Mean and standard deviation of the patient ages in the PYNEH dataset were derived from 478 out of the 564 unique patients used. SD, standard deviation; JSRT, Japanese Society of Radiological Technology; NA, not applicable/no information found; QEH, Queen Elizabeth Hospital; PYNEH, Pamela Youde Nethersole Eastern Hospital.