Table 1.
Demographic characteristics and disease categories of the study subjects in different datasets
| Characteristics | All | Training set | Validation set | Test set | Prospective test set |
|---|---|---|---|---|---|
| Subjects, n | 8306 | 5557 | 807 | 1587 | 355 |
| Mean (± SD), years | 45.9 ± 12.7 | 45.8 ± 12.7 | 45.9 ± 12.7 | 45.7 ± 12.7 | 47.8 ± 13.0 |
| Sex, n(%) | |||||
| Female | 2562 (30.9) | 1681 (30.3) | 250 (31.0) | 507 (32.0) | 124 (34.9) |
| Male | 5612 (67.6) | 3783 (68.1) | 540 (66.9) | 1058 (66.7) | 231 (65.1) |
| N/A | 132 (1.6) | 93 (1.7) | 17 (2.1) | 22 (1.4) | 0 (0.0) |
| Disease category, n(%) | |||||
| Normal | 5713 (19.7) | 3763 (19.2) | 584 (21.7) | 961 (18.2) | 405 (28.3) |
| Malignancies | |||||
| NPC | 19,107 (66.0) | 13,061 (66.7) | 1749 (65.0) | 3564 (67.6) | 731(51.1) |
| Othersa | 335 (1.2) | 252 (1.3) | 22 (0.8) | 54 (1.0) | 7 (0.4) |
| Benign diseasesb | 3811 (13.2) | 2500 (12.8) | 335 (12.5) | 691 (13.1) | 287(20.1) |
| Images, n(%) | 28,966 | 19,576 (67.6) | 2690 (9.3) | 5270 (18.2) | 1430 (4.9) |
N/A not available, NPC nasopharyngeal carcinoma
aLymphoma, rhabdomyosarcoma, olfactory neuroblastoma, malignant melanoma and plasmacytoma
bPrecancerous/atypical hyperplasia, fibroangioma, leiomyoma, meningioma, minor salivary gland tumour, fungal infection, tuberculosis, chronic inflammation, adenoids/lymphoid hyperplasia, nasopharyngeal cyst and foreign bodies