TABLE 3.
Characteristics of patients investigated by the included studies.
| Variables (number of papers that recorded this data) | Values from included studies | |
|---|---|---|
| Sex (78/82) | ||
| Male | 61% (5226) | |
| Female | 39% (3334) | |
| Aggregate mean age (55/82) | 65.5 | |
| Mean lower–upper limit of age (52/82) | 32–82 | |
| Median age (19/82) | 60 | |
| Malignant primary | No. of patients | Percentage |
| Prostate | 3651 | 41.41 |
| Cervix | 1589 | 18.02 |
| Colorectal | 650 | 7.37 |
| Bladder | 553 | 6.27 |
| Gastric | 502 | 5.69 |
| Gynaecological | 427 | 4.84 |
| Gastrointestinal | 299 | 3.39 |
| Uterus (endometrial) | 207 | 2.35 |
| Ovarian | 206 | 2.34 |
| Genitourinary | 164 | 1.86 |
| Other | 111 | 1.26 |
| Breast | 105 | 1.19 |
| Lymphoma/sarcoma | 94 | 1.07 |
| Urothelial | 53 | 0.60 |
| Lung | 50 | 0.57 |
| Gallbladder | 32 | 0.36 |
| Retroperitoneal | 25 | 0.28 |
| Pancreas | 20 | 0.23 |
| Metastatic (primary not given) | 17 | 0.19 |
| Haematological | 12 | 0.14 |
| Unknown origin | 11 | 0.12 |
| Vulval | 7 | 0.08 |
| Renal | 7 | 0.08 |
| Testicular | 7 | 0.08 |
| Oesophageal | 6 | 0.07 |
| Osteologic | 4 | 0.05 |
| Choriocarcinoma | 2 | 0.02 |
| Head and neck | 2 | 0.02 |
| Melanoma | 2 | 0.02 |
| Neuroblastoma | 1 | 0.01 |