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| Nations/regions | Authors | Samples (< 60 years) | PCa (%) | PCa < 60 years (%) | Clinical significance (< 60 years) |
|---|---|---|---|---|---|
| Iran | Hosseini et al. 8 | 50 (9) | 7 (14) | 3 (33.3) | 0 |
| Taiwan, China | Yang et al. 13 | 49 (25) | 16 (33) | 4 (16) | 0 |
| Taiwan, China | Lee et al. 10 | 248 (124) | 10 (4) | 0 | 0 |
| Mainland China | Xia 11 | 22 (13) | 3 (13.6) | 0 | 0 |
| Present study | 92 (51) | 3 (3.3) | 0 | 0 | |
| Overall | 461 (222) | 39 (8.5) | 7 (3.2) | 0 |
Abbreviation: PCa, prostate cancer.
