Table 2.
Characteristics of larynx cancer patients with prior cancer.
| Characteristics | Patients with prior cancer in matched data set 2 | ||
|---|---|---|---|
| Interval time <60 months | Interval time ≥ 60 months | P-value | |
| N = 1,100 (%) | N = 398 (%) | ||
| Age group | <0.001 | ||
| <65 | 351 (31.9) | 86 (21.6) | |
| ≥65 | 749 (68.1) | 312 (78.4) | |
| Gender | 0.866 | ||
| Female | 158 (14.4) | 56 (14.1) | |
| Male | 942 (85.6) | 342 (85.9) | |
| Race | |||
| White | 965 (87.7) | 352 (88.4) | 0.826 |
| Black | 121 (11.0) | 40 (10.1) | |
| Other | 14 (1.3) | 6 (1.5) | |
| Unknown | NA | NA | |
| Marital status | 0.079 | ||
| Married | 634 (57.6) | 253 (63.6) | |
| Unmarried | 435 (39.5) | 132 (33.2) | |
| Unknown | 31 (2.8) | 13 (3.3) | |
| AJCC TNM | 0.605 | ||
| I | 537 (48.8) | 206 (51.8) | |
| II | 166 (15.1) | 63 (15.8) | |
| III | 150 (13.6) | 50 (12.6) | |
| IV | 190 (17.3) | 65 (16.3) | |
| Unknown | 57 (5.2) | 14 (3.5) | |
| Primary site | 0.003 | ||
| Glottis | 631 (57.4) | 271 (68.1) | |
| Supraglottis | 422 (38.4) | 111 (27.9) | |
| Subglottis | 8 (0.7) | 1 (0.3) | |
| Laryngeal cartilage | NA | NA | |
| Overlapping lesion of larynx | 8 (0.7) | 2 (0.5) | |
| Larynx, NOS | 31 (2.8) | 13 (3.3) | |
| Grade | 0.46 | ||
| Well differentiated; Grade I | 126 (11.5) | 49 (12.3) | |
| Moderately differentiated; Grade II | 540 (49.1) | 209 (52.5) | |
| Poorly differentiated; Grade III | 179 (16.3) | 50 (12.6) | |
| Undifferentiated; anaplastic; Grade IV | 2 (0.2) | 1 (0.3) | |
| Unknown | 253 (23.0) | 89 (22.4) | |
| Surgery of primary site | NA | ||
| No/unknown | 1,100 (100) | 398 (100) | |
| Yes | NA | NA | |
| Radiation | 0.57 | ||
| No/unknown | 253 (23.0) | 86 (21.6) | |
| Yes | 847 (77.0) | 312 (78.4) | |
| Chemotherapy | 0.281 | ||
| No/unknown | 830 (75.5) | 311 (78.1) | |
| Yes | 270 (24.5) | 87 (21.9) | |
| Sties of prior cancer | <0.001 | ||
| Breast | 41 (3.7) | 20 (5.0) | |
| Gastrointestinal tumor | 135 (12.3) | 53 (13.3) | |
| Genitourinary tumor | 124 (11.3) | 54 (13.6) | |
| Head and neck cancer | 126 (11.5) | 46 (11.6) | |
| Hematologic tumor | 67 (6.1) | 19 (4.8) | |
| Lung and bronchus cancer | 210 (19.1) | 29 (7.3) | |
| Melanoma | 29 (2.6) | 15 (3.8) | |
| Prostate cancer | 320 (29.1) | 155 (38.9) | |
| Other | 48 (4.4) | 7 (1.8) | |
NA, not available.