Table 1.
Patient characteristics by treatment group
| No RT (N = 5039) N (%) | Pre-operative RT (N = 299) N (%) | Post-operative RT (N = 3136) N (%) | |
|---|---|---|---|
| Year | |||
| 2000–2004 | 1751 (34.7) | 91 (30.4) | 1364 (43.5) |
| 2005–2010 | 3288 (65.3) | 208 (79.6) | 1772 (56.5) |
| Age | |||
| 18–39 | 112 (2.2) | 2 (0.6) | 48 (1.5) |
| 40–64 | 1939 (38.5) | 179 (59.9) | 1672 (53.3) |
| 65+ | 2988 (59.3) | 118 (39.5) | 1416 (45.2) |
| Gender | |||
| Male | 2418 (48.0) | 156 (52.2) | 1606 (51.2) |
| Female | 2621 (52.0) | 143 (47.8) | 1530 (48.8) |
| Race | |||
| Non-Hispanic white | 4214 (83.6) | 249 (83.3) | 2680 (85.5) |
| Black | 549 (10.9) | 38 (12.7) | 342 (10.9) |
| Other or unknown | 276 (5.5) | 12 (4.0) | 114 (3.6) |
| Tumour size | |||
| <2 cm | 604 (12.0) | 21 (7.0) | 298 (9.5) |
| ≥2 cm | 4210 (83.5) | 259 (86.6) | 2701 (86.1) |
| Missing | 225 (4.5) | 19 (6.4) | 137 (4.4) |
| Tumour grade | |||
| 1 or 2 | 2860 (56.8) | 141 (47.2) | 1834 (58.5) |
| 3 | 1594 (31.6) | 81 (27.1) | 1039 (33.1) |
| 4 | 66 (1.3) | 3 (1.0) | 36 (1.1) |
| Missing/unknown | 519 (10.3) | 74 (24.7) | 227 (7.2) |
| T-stage | |||
| 1 and 2 | 1440 (28.6) | 52 (17.4) | 653 (20.8) |
| 3 | 3411 (67.7) | 188 (62.9) | 2314 (73.8) |
| 4 | 188 (3.7) | 59 (19.7) | 169 (5.4) |
| Surgery type | |||
| Whipple | 3525 (70.0) | 225 (75.3) | 2325 (74.1) |
| Total pancreatectomy | 589 (11.7) | 39 (13.0) | 327 (10.4) |
| Other | 925 (18.4) | 35 (11.7) | 484 (15.4) |
| Node positive | |||
| No | 2295 (45.5) | 197 (65.9) | 1081 (34.5) |
| Yes | 2744 (54.5) | 102 (34.1) | 2055 (65.5) |
| Nodes examined | |||
| 0 | 236 (4.7) | 26 (8.7) | 94 (3.0) |
| 1–9 | 1930 (38.3) | 120 (40.1) | 1105 (35.2) |
| 10–14 | 1103 (21.9) | 78 (26.1) | 764 (24.4) |
| 15+ | 1673 (33.2) | 68 (22.7) | 1109 (35.4) |
| Unknown | 97 (1.9) | 7 (2.3) | 64 (2.0) |
| Registry | |||
| Connecticut | 307 (6.1) | 22 (7.4) | 180 (5.7) |
| Metropolitan Detroit | 265 (5.3) | 55 (18.4) | 314 (10.0) |
| Iowa | 177 (3.5) | 20 (6.7) | 162 (5.2) |
| Seattle (Puget Sound) | 224 (4.4) | 11 (3.7) | 215 (6.9) |
| Utah | 157 (3.1) | 17 (5.7) | 71 (2.3) |
| Metropolitan Atlanta | 188 (3.7) | 11 (3.7) | 119 (3.8) |
| Los Angeles | 662 (13.1) | 16 (5.4) | 215 (6.9) |
| Greater California | 1228 (24.4) | 44 (14.7) | 630 (20.1) |
| Kentucky | 312 (6.2) | 14 (4.7) | 220 (7.0) |
| Louisiana | 287 (5.7) | 27 (9.0) | 217 (6.9) |
| New Jersey | 806 (16.0) | 42 (14.0) | 557 (17.8) |
| Greater Georgia | 426 (8.5) | 20 (6.7) | 236 (7.5) |
Characteristics of patients undergoing surgery without radiation therapy (RT), pre-operative RT and post-operative RT 2000–2010 (N = 8474).