Table 1.
Clinical and demographic characteristics of the cohort stratified by age at surgery.
| <50 years | 50–59 years | 60–69 years | ≥70 years | P-value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | (%) | N | (%) | N | (%) | N | (%) | |||
| 547 | (19.1) | 784 | (27.3) | 838 | (29.2) | 701 | (24.4) | |||
| Year of procedure | 0.08 | |||||||||
| 2005–2006 | 5 | (0.9) | 7 | (0.9) | 5 | (0.6) | 10 | (1.4) | ||
| 2007 | 8 | (1.5) | 23 | (2.9) | 22 | (2.6) | 25 | (3.6) | ||
| 2008 | 33 | (6.0) | 49 | (6.3) | 41 | (4.9) | 46 | (6.6) | ||
| 2009 | 68 | (12.4) | 70 | (8.9) | 88 | (10.5) | 51 | (7.3) | ||
| 2010 | 74 | (13.5) | 98 | (12.5) | 107 | (12.8) | 81 | (11.6) | ||
| 2011 | 166 | (30.4) | 241 | (30.7) | 251 | (30.0) | 221 | (31.5) | ||
| 2012 | 193 | (35.3) | 296 | (37.8) | 324 | (38.7) | 267 | (38.1) | ||
| Race | 0.0003 | |||||||||
| White | 388 | (70.9) | 575 | (73.3) | 661 | (78.9) | 540 | (77.0) | ||
| Black | 52 | (9.5) | 56 | (7.1) | 37 | (4.4) | 45 | (6.4) | ||
| Other | 27 | (4.9) | 30 | (3.8) | 19 | (2.3) | 15 | (2.1) | ||
| Unknown | 80 | (14.6) | 123 | (15.7) | 121 | (14.4) | 101 | (14.4) | ||
| BMI | <0.0001 | |||||||||
| Normal | 202 | (36.9) | 275 | (35.1) | 275 | (32.8) | 276 | (39.4) | ||
| Overweight | 136 | (24.9) | 195 | (24.9) | 258 | (30.8) | 238 | (34.0) | ||
| Obese | 197 | (36.0) | 302 | (38.5) | 300 | (35.8) | 185 | (26.4) | ||
| Unknown | 12 | (2.2) | 12 | (1.5) | 5 | (0.6) | 2 | (0.3) | ||
| ASA Class | <0.0001 | |||||||||
| 1 | 43 | (7.9) | 33 | (4.2) | 15 | (1.8) | 3 | (0.4) | ||
| 2 | 287 | (52.5) | 399 | (50.9) | 347 | (41.4) | 228 | (32.5) | ||
| 3 | 204 | (37.3) | 330 | (42.1) | 440 | (52.5) | 433 | (61.8) | ||
| ≥4 | 12 | (2.2) | 21 | (2.7) | 36 | (4.3) | 37 | (5.3) | ||
| Unknown | 1 | (0.2) | 1 | (0.1) | 0 | (0.0) | 0 | (0.0) | ||
| Functional status | 0.02 | |||||||||
| Independent | 531 | (97.1) | 770 | (98.2) | 824 | (98.3) | 668 | (95.3) | ||
| Partially dependent | 11 | (2.0) | 11 | (1.4) | 13 | (1.6) | 29 | (4.1) | ||
| Totally dependent | 4 | (0.7) | 3 | (0.4) | 1 | (0.1) | 4 | (0.6) | ||
| Unknown | 1 | (0.2) | 0 | (0.0) | 0 | (0.0) | 0 | (0.0) | ||
| Modified frailty index | ||||||||||
| Median (IQR) | 0 (0-0) | 0 (0–0.09) | 0.09 (0–0.2) | 0.09 (0–0.2) | ||||||
| Preoperative albumin | <0.0001 | |||||||||
| <3.5 | 82 | (15.0) | 117 | (14.9) | 144 | (17.2) | 153 | (21.8) | ||
| 3.5–4 | 120 | (21.9) | 179 | (22.8) | 220 | (26.3) | 207 | (29.5) | ||
| >4 | 164 | (30.0) | 237 | (30.2) | 216 | (25.8) | 158 | (22.5) | ||
| Unknown | 181 | (33.1) | 251 | (32.0) | 258 | (30.8) | 183 | (26.1) | ||
| Preoperative conditions | ||||||||||
| Insulin dependent diabetes mellitus | 18 | (3.3) | 23 | (2.9) | 21 | (2.5) | 18 | (2.6) | <0.0001 | |
| Non-insulin dependent diabetes mellitus | 18 | (3.3) | 43 | (5.5) | 82 | (9.8) | 86 | (12.3) | <0.0001 | |
| Tobacco use | 116 | (21.2) | 131 | (16.7) | 103 | (12.3) | 48 | (6.9) | <0.0001 | |
| COPD | 3 | (0.6) | 11 | (1.4) | 27 | (3.2) | 35 | (5.0) | <0.0001 | |
| Ascites | 104 | (19.0) | 151 | (19.3) | 213 | (25.4) | 154 | (22.0) | 0.03 | |
| CHF | 0 | (0.0) | 4 | (0.5) | 2 | (0.2) | 6 | (0.9) | 0.06 | |
| Hypertension | 84 | (15.4) | 242 | (30.9) | 405 | (48.3) | 457 | (65.2) | <0.0001 | |
| Steroid use | 11 | (2.0) | 19 | (2.4) | 30 | (3.6) | 28 | (4.0) | 0.02 | |
| Concurrent procedures | ||||||||||
| Lymphadenectomy | 248 | (45.3) | 359 | (45.8) | 320 | (38.2) | 215 | (30.7) | <0.0001 | |
| Cytoreduction | 224 | (41.0) | 371 | (47.3) | 458 | (54.7) | 351 | (50.1) | 0.0001 | |
| Small bowel resection | 10 | (1.8) | 24 | (3.1) | 25 | (3.0) | 32 | (4.6) | 0.01 | |
| Colectomy | 11 | (2.0) | 17 | (2.2) | 37 | (4.4) | 41 | (5.9) | <0.0001 | |
| Rectosigmoid resection | 15 | (2.7) | 47 | (6.0) | 55 | (6.6) | 37 | (5.3) | 0.07 | |
| Hepatic resection | 8 | (1.5) | 12 | (1.5) | 14 | (1.7) | 10 | (1.4) | 0.99 | |
| Bladder resection | 1 | (0.2) | 1 | (0.1) | 2 | (0.2) | 0 | (0.0) | 0.52 | |
| Diaphragm resection | 10 | (1.8) | 11 | (1.4) | 20 | (2.4) | 11 | (1.6) | 0.86 | |
| Extended procedure score | <0.0001 | |||||||||
| 0 | 309 | (56.5) | 396 | (50.5) | 342 | (40.8) | 305 | (43.5) | ||
| 1 | 201 | (36.8) | 300 | (38.3) | 394 | (47.0) | 319 | (45.5) | ||
| 2 | 30 | (5.5) | 75 | (9.6) | 84 | (10.0) | 65 | (9.3) | ||
| >3 | 7 | (1.3) | 13 | (1.7) | 18 | (2.2) | 12 | (1.7) | ||