Baseline characteristics of patients in the two analytic cohorts. GOG-99 only indicates patients meeting only the GOG-99 high–intermediate risk criteria; PORTEC-1 indicates patients meeting only the PORTEC-1 high–intermediate risk criteria.
| GOG-99 only (n=11,207) No. (%) | PORTEC-1 only (n=5,920) No. (%) | |
| Sociodemographic factors | ||
| Year of diagnosis | ||
| 2010 | 1589 (14.2) | 804 (13.6) |
| 2011 | 1653 (14.7) | 883 (14.9) |
| 2012 | 1870 (16.7) | 964 (16.3) |
| 2013 | 1950 (17.4) | 1004 (17.0) |
| 2014 | 2040 (18.2) | 1128 (19.1) |
| 2015 | 2105 (18.8) | 1137 (19.2) |
| Age | ||
| ≤60 years | 3755 (33.5) | 0 (0.0) |
| >60 years | 7452 (66.5) | 5920 (100.0) |
| Charlson-Deyo co-morbidity score | ||
| 0 | 8092 (72.2) | 4332 (73.2) |
| 1 | 2473 (22.1) | 1275 (21.5) |
| ≥2 | 642 (5.7) | 313 (5.3) |
| Race/ethnicity | ||
| Non-black | 10266 (91.6) | 5062 (85.5) |
| Black | 862 (7.7) | 784 (13.2) |
| Unknown | 79 (0.7) | 74 (1.3) |
| Insurance status | ||
| Government | 7029 (62.7) | 3173 (53.6) |
| Private | 3807 (34.0) | 2517 (42.5) |
| Uninsured | 265 (2.4) | 156 (2.6) |
| Unknown | 106 (0.9) | 74 (1.3) |
| Facility type | ||
| Academic | 6288 (56.1) | 3335 (56.3) |
| Community/comprehensive community | 4901 (43.7) | 2585 (43.7) |
| Unknown | 18 (0.2) | 0 (0.0) |
| Facility location | ||
| Midwest | 3004 (26.8) | 1608 (27.2) |
| Northeast | 5201 (46.4) | 2780 (47.0) |
| South | 1405 (12.5) | 656 (11.1) |
| West | 1579 (14.1) | 876 (14.8) |
| Unknown | 18 (0.2) | 0 (0.0) |
| Pathological factors | ||
| FIGO stage | ||
| IA | 8733 (77.9) | 3611 (61.0) |
| IB | 2474 (22.1) | 2309 (39.0) |
| Lymphovascular invasion | ||
| No | 7138 (63.7) | 5920 (100.0) |
| Yes | 4069 (36.3) | 0 (0.0) |
| Histologic grade | ||
| Grade 1 | 721 (6.4) | 2309 (39.0) |
| Grade 2 | 10007 (89.3) | 0 (0.0) |
| Grade 3 | 479 (4.3) | 3611 (61.0) |
| Treatment factors | ||
| Received radiation therapy | ||
| No | 7414 (66.2) | 3382 (57.1) |
| Yes | 3793 (33.8) | 2538 (42.9) |
| Radiation therapy modality | ||
| Brachytherapy alone | 2981 (26.6) | 2115 (35.7) |
| External beam therapy alone | 532 (4.7) | 282 (4.8) |
| External beam and brachytherapy | 280 (2.5) | 141 (2.4) |
| No radiation | 7414 (66.2) | 3382 (57.1) |
| Received chemotherapy | ||
| No | 10302 (91.9) | 4340 (73.3) |
| Yes | 905 (8.1) | 1580 (26.7) |
| Received lymph node dissection | ||
| No | 2376 (21.2) | 995 (16.8) |
| Yes | 8820 (78.7) | 4916 (83.0) |
| Unknown | 11 (0.1) | 9 (0.2) |