Table 2 Clinical characteristics of multiple primary cancers patients. Clinical characteristics of patients with metachronous and synchronous multiple primary cancers
Clinical variable | Metachronous multiple primary cancers (n = 1265, 70.87%) | Synchronous multiple primary cancers (n = 520, 29.13%) | Total (n = 1785) | P |
|---|---|---|---|---|
Sex |  |  |  | <  0.001a |
 Male | 596 (47.1%) | 196 (37.7%) | 792 (44.4%) |  |
 Female | 669 (52.9%) | 324 (62.3%) | 993 (55.6%) |  |
Age at 1st diagnosis | Â | Â | Â | 0.691b |
 Mean (SD) | 60.2 (13.1) | 60.0 (13.5) | 60.1 (13.2) |  |
 Range | 18.0–96.0 | 20.0–103.0 | 18.0–103.0 |  |