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Characteristics of cases and controls
| N (%) male | N (%) female | Median age | Age range | Mean age (standard deviation) | Total N | |
| All controls | 907 (63.4) | 523 (36.6) | 62 | 7.2–75 | 60.9 (9.9) | 1430 |
| Orthopedic controls | 35 (53.8) | 30 (46.2) | 18.5 | 7.2–68.5 | 25 (15.2) | 65 |
| PLCO controls | 872 (63.9) | 493 (36.1) | 62 | 55–75 | 62.6 (5.2) | 1365 |
| OS cases | 56 (56.6) | 43 (43.4) | 20.4 | 8–80.4 | 26.6 (16.0) | 99 |
N, number of individuals; OS, osteosarcoma; PLCO, Prostate, Lung, Colon, Ovarian Cancer Cohort.
