Table 1.
Demographic and Clinical Characteristics of Study Population (N=1062)
| Laparoscopic (N=302) N (%) |
Open (N=760) N (%) |
P value | |
|---|---|---|---|
| Gender | .90 | ||
| Male | 140 (46.4) | 354 (46.6) | |
| Female | 162 (53.6) | 406 (53.4) | |
| Age group, year | < .001 | ||
| <60 | 85 (28.2) | 151 (19.9) | |
| 60–69 | 71 (23.5) | 183 (24.1) | |
| 70–79 | 88 (29.1) | 205 (27.0) | |
| ≥80 | 58 (19.2) | 221 (29.1) | |
| Race/Ethnicity | .84 | ||
| Non-Hispanic white | 286 (95.0) | 717 (94.7) | |
| Other | 15 (5.0) | 40 (5.3) | |
| Marital status | .21 | ||
| Married | 197 (65.5) | 464 (61.1) | |
| Unmarried | 105 (34.8) | 296 (39.0) | |
| Residence at diagnosis | < .001 | ||
| Urban | 151 (53.9) | 276 (40.1) | |
| Rural | 129 (46.1) | 412 (59.9) | |
| Insurance payer | < .05 | ||
| Private | 81 (26.8) | 158 (20.8) | |
| Medicaid/Medicare | 169 (56.0) | 485 (63.8) | |
| Admission type | < .001 | ||
| Elective | 271 (89.7) | 614 (80.8) | |
| Emergency/Urgent | 31 (10.3) | 146 (19.2) | |
| Tumor location | .15 | ||
| Cecum | 90 (29.8) | 175 (23.0) | |
| Ascending colon | 59 (19.5) | 153 (20.1) | |
| Hepatic flexure | 16 (5.3) | 44 (5.8) | |
| Transverse colon | 23 (7.6) | 90 (11.8) | |
| Splenic flexure | 12 (4.0) | 33 (4.3) | |
| Descending colon | 18 (6.0) | 34 (4.5) | |
| Sigmoid colon | 71 (23.5) | 180 (23.7) | |
| AJCC stage | < .001 | ||
| 0,I,II,IIIa | 218 (72.2) | 423 (55.8) | |
| IIIb, IV, NA, Occult | 76 (25.2) | 315 (41.6) | |
| Unknown | 8 (2.7) | 20 (2.6) | |
| Grade/Differentiation | .41 | ||
| Well | 22 (7.3) | 48 (6.3) | |
| Moderate | 197 (65.2) | 492 (64.9) | |
| Poor | 39 (12.9) | 135 (17.8) | |
| Undifferentiated | 20 (6.6) | 36 (4.8) | |
| Unknown | 24 (8.0) | 47 (6.2) | |
| Behavior | .09 | ||
| Benign/Borderline | 0 (0.0) | 1 (0.1) | |
| In Situ | 7 (2.3) | 5 (0.7) | |
| Invasive | 295 (97.7) | 754 (99.2) | |
| Tumor size (cm), mean (SD) | 3.8 (2.1) | 4.4 (2.6) | < .001 |
| Number of positive lymph nodes | |||
| 1–4 | 60 (19.9) | 195 (25.7) | < .05 |
| 5–10 | 20 (6.6) | 59 (7.8) | |
| >10 | 9 (3.0) | 34 (4.5) | |
| No nodes examined | 9 (3.0) | 29 (3.8) | |
| Nodes examined were negative | 204 (67.6) | 437 (57.5) | |
| Number of regional lymph nodes examined | .70 | ||
| 1–10 | 29 (9.6) | 86 (11.3) | |
| 11–20 | 169 (56.0) | 393 (51.7) | |
| 21–30 | 63 (20.9) | 170 (22.4) | |
| >30 | 32 (10.6) | 72 (9.5) | |
| No nodes examined | 9 (3.0) | 29 (3.8) | |
| Charlson Comorbidity Index | .21 | ||
| 0 | 192 (63.6) | 442 (58.2) | |
| 1 | 67 (22.2) | 209 (27.5) | |
| 2 | 24 (8.0) | 82 (10.8) | |
| 3 | 19 (6.3) | 27 (3.6) |