Table 1.
Sociodemographic and clinical characteristics of study patients.
| Characteristic | Unweighted study population* | Weighted study population** | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Overall (n=310), n (%) | Chemotherapy (n=153), n (%) | No chemotherapy (n=157), n (%) | P value | Overall (%) | Chemotherapy (%) | No chemotherapy (%) | P value | ||
| Age(year) | <60 | 151 (48.7) | 89 (58.2) | 62 (39.5) | 0.001 | 48.5 | 48 | 49 | 0.878 |
| ≥60 | 159 (51.3) | 64 (41.8) | 95 (60.5) | 51.5 | 52 | 51 | |||
| Gender | Male | 145 (46.8) | 83 (54.2) | 62 (39.5) | 0.012 | 45.7 | 45.5 | 46 | 0.929 |
| Female | 165 (53.2) | 70 (45.8) | 95 (60.5) | 54.3 | 54.5 | 54 | |||
| Race | White | 249 (80.3) | 122 (79.7) | 127 (80.9) | 0.910 | 81.4 | 81.5 | 81.2 | 0.990 |
| Black | 38 (12.3) | 20 (13.1) | 18 (11.5) | 11.4 | 11.4 | 11.3 | |||
| Other | 23 (7.4) | 11 (7.2) | 12 (7.6) | 7.2 | 7.1 | 7.5 | |||
| Insurance type | Insured | 111 (35.8) | 54 (35.3) | 57 (36.3) | 0.379 | 36.9 | 36.3 | 37.6 | 0.978 |
| Any medicaid | 22 (7.1) | 14 (9.2) | 8 (5.1) | 6.9 | 7 | 6.8 | |||
| Unknown | 177 (57.1) | 85 (55.6) | 92 (58.6) | 56.2 | 56.7 | 55.6 | |||
| Marital status | Single | 55 (17.7) | 36 (23.5) | 19 (12.1) | 0.008 | 17.5 | 17.9 | 17.1 | 0.984 |
| Widowed/divorced | 76 (24.5) | 28 (18.3) | 48 (30.6) | 24.5 | 24.7 | 24.3 | |||
| Married | 170 (54.8) | 83 (54.2) | 87 (55.4) | 54.5 | 54.3 | 54.7 | |||
| Unknown | 9 (2.9) | 6 (3.9) | 3 (1.9) | 3.5 | 3.1 | 3.9 | |||
| Year of diagnosis | 1976 to 1985 | 20 (6.5) | 7 (4.6) | 13 (8.3) | 0.476 | 7 | 7.5 | 6.5 | 0.985 |
| 1986 to 1995 | 36 (11.6) | 18 (11.8) | 18 (11.5) | 11.3 | 11.2 | 11.5 | |||
| 1996 to 2005 | 102 (32.9) | 48 (31.4) | 54 (34.4) | 31.5 | 31.8 | 31.2 | |||
| 2006 to 2016 | 152 (49) | 80 (52.3) | 72 (45.9) | 50.2 | 49.5 | 50.8 | |||
| Primary site | Extremity | 135 (43.5) | 80 (52.3) | 55 (35) | 0.004 | 42.9 | 42.3 | 43.6 | 0.993 |
| Trunk | 84 (27.1) | 29 (19) | 55 (35) | 27.7 | 28.5 | 26.9 | |||
| Visceral | 51 (16.5) | 26 (17) | 25 (15.9) | 15.9 | 15.9 | 15.8 | |||
| Other | 40 (12.9) | 18 (11.8) | 22 (14) | 13.5 | 13.3 | 13.7 | |||
| Grade | Grade I/II | 22 (7.1) | 6 (3.9) | 16 (10.2) | 0.025 | 8.2 | 9.1 | 7.2 | 0.818 |
| Grade III/IV | 203 (65.5) | 110 (71.9) | 93 (59.2) | 63.6 | 63.9 | 63.2 | |||
| Unknown | 85 (27.4) | 37 (24.2) | 48 (30.6) | 28.2 | 27 | 29.6 | |||
| Stage | Localized | 146 (47.1) | 67 (43.8) | 79 (50.3) | 0.072 | 47.2 | 47.3 | 47.2 | 0.998 |
| Regional | 96 (31) | 43 (28.1) | 53 (33.8) | 30.7 | 30.6 | 30.9 | |||
| Distant | 52 (16.8) | 32 (20.9) | 20 (12.7) | 17.1 | 17 | 17.4 | |||
| Unstaged | 16 (5.2) | 11 (7.2) | 5 (3.2) | 5 | 5 | 4.5 | |||
| Tumor size (mm) | <73 | 155 (50) | 70 (45.8) | 85 (54.1) | 0.173 | 49.2 | 48.2 | 50.3 | 0.742 |
| ≥73 | 155 (50) | 83 (54.2) | 72 (45.9) | 50.8 | 51.8 | 49.7 | |||
| Radiation | Yes | 73 (23.5) | 40 (26.1) | 33 (21) | 0.349 | 24.6 | 24.7 | 24.4 | 0.956 |
| No | 237 (76.5) | 113 (73.9) | 124 (79) | 75.4 | 75.3 | 75.6 | |||
| Surgery | Yes | 272 (87.7) | 131 (85.6) | 141 (89.8) | 0.301 | 87.1 | 87.3 | 86.9 | 0.918 |
| No | 38 (12.3) | 22 (14.4) | 16 (10.2) | 12.9 | 12.7 | 13.1 | |||
Mm – millimeter.
*
Data are presented as number (percentage) of patients unless otherwise specified.
**
Data are presented as percentage of weighted study population unless otherwise specified.