Table 3.
Demographic and Clinical Characteristics by County of Residence (N=968)
| Rural (N=541) N (%) |
Urban (N=427) N (%) |
P value | |
|---|---|---|---|
| Gender | .30 | ||
| Male | 239 (44.2) | 202 (47.3) | |
| Female | 302 (55.8) | 225 (52.7) | |
| Age group, year | < .0001 | ||
| <60 | 87 (16.1) | 128 (30.0) | |
| 60–69 | 142 (26.3) | 85 (19.9) | |
| 70–79 | 149 (27.5) | 119 (27.9) | |
| ≥80 | 163 (30.1) | 95 (22.3) | |
| Race/Ethnicity | < .0001 | ||
| Non-Hispanic White | 531 (98.3) | 382 (89.9) | |
| Other | 9 (1.7) | 43 (10.1) | |
| Marital status | < .05 | ||
| Married | 179 (33.1) | 175 (41.0) | |
| Unmarried | 362 (66.9) | 252 (59.0) | |
| Insurance payer | < .0001 | ||
| Private | 94 (17.4) | 126 (29.5) | |
| Medicaid/Medicare | 373 (69.0) | 218 (51.1) | |
| Other | 74 (13.7) | 83 (19.4) | |
| Treatment group | |||
| Laparoscopic | 129 (23.8) | 151 (35.4) | < .0001 |
| Open | 412 (76.2) | 276 (64.6) | |
| Admission type | < .01 | ||
| Elective | 441 (81.5) | 379 (88.8) | |
| Emergency/Urgent | 100 (18.5) | 48 (11.2) | |
| Tumor location | .89 | ||
| Cecum | 135 (25.0) | 108 (25.3) | |
| Ascending colon | 109 (20.2) | 88 (20.6) | |
| Hepatic Flexure | 35 (6.5) | 21 (4.9) | |
| Transverse colon | 61 (11.3) | 43 (10.1) | |
| Splenic Flexure | 27 (5.0) | 16 (3.8) | |
| Descending colon | 27 (5.0) | 24 (5.6) | |
| Sigmoid colon | 121 (22.4) | 104 (24.4) | |
| AJCC stage | < .005 | ||
| 0,I,II,IIIa | 305 (56.5) | 287 (67.4) | |
| IIIb, IV, NA, Occult | 217 (40.2) | 134(31.5) | |
| Unknown | 18 (3.3) | 5 (1.2) | |
| Grade/Differentiation | .26 | ||
| Well | 28 (5.2) | 29 (6.8) | |
| Moderate | 367 (68.1) | 271 (63.5) | |
| Poor | 95 (17.6) | 62 (14.5) | |
| Undifferentiated | 18 (3.3) | 36 (8.4) | |
| Unknown | 31 (5.8) | 29 (6.8) | |
| Behavior | .09 | ||
| In Situ | 4 (<1) | 9 (2.11) | |
| Invasive | 537 (99.3) | 418 (97.9) | |
| Tumor size (cm), mean (SD) | 4.4 (2.4) | 4.1 (2.5) | .16 |
| Number of positive lymph nodes | < .01 | ||
| 1–4 | 130 (24.0) | 100 (23.4) | |
| 5–10 | 52 (9.6) | 20 (4.7) | |
| >10 | 25 (4.6) | 15 (3.5) | |
| No nodes examined | 18 (2.6) | 11 (2.6) | |
| Nodes examined were negative | 313 (57.9) | 279 (65.3) | |
| Number of regional lymph nodes examined | < .01 | ||
| 1–10 | 76 (14.1) | 28 (6.6) | |
| 11–20 | 274 (50.7) | 232 (54.3) | |
| 21–30 | 118 (21.8) | 104 (24.4) | |
| >30 | 50 (9.2) | 48 (11.2) | |
| No nodes examined | 18 (3.3) | 11 (2.6) | |
| Charlson Comorbidity Index | .13 | ||
| 0 | 330 (61.0) | 251 (58.8) | |
| 1 | 143 (26.4) | 100 (23.4) | |
| 2 | 46 (8.5) | 55 (12.9) | |
| 3 | 22 (4.1) | 21 (4.9) | |
| Days between diagnosis and treatment | .05 | ||
| Median | 12.0 | 15.0 | |
| Mean (SD) | 18.3 (31.2) | 20.4 (34.2) | |
| <30 | 454 (87.0) | 344 (81.5) | .06 |
| 30–59 | 50 (9.6) | 65 (15.4) | |
| 60–89 | 5 (<1) | 4 (<1) | |
| ≥90 | 13 (2.5) | 9 (2.1) |