Table 1.
Demographic and pathologic data for pT1/T2 cases of clear cell and cystic renal cell carcinoma
| Clear cell RCC, N = 46,677 (%) |
Cystic RCC, N = 678 (%) |
P value | |
|---|---|---|---|
| Age, y | |||
| <50 | 9,413 (20) | 208 (31) | <0.001 |
| 51–59 | 12,025 (26) | 157 (23) | |
| 60–69 | 12,798 (27) | 161 (24) | |
| 70–79 | 9,547 (20) | 119 (18) | |
| >80 | 2,894 (6) | 33 (5) | |
| Age, mean (SD), y | 61 (14) | 58 (13) | <0.001 |
| Race | |||
| White | 39,535 (85) | 495 (74) | <0.001 |
| Black | 4,245 (9) | 150 (22) | |
| Other | 2,547 (6) | 26 (4) | |
| Sex | |||
| Male | 27,679 (59) | 372 (55) | 0.02 |
| Female | 18,998 (41) | 306 (45) | |
| Pathologic category | |||
| pT1a | 25,644 (55) | 446 (66) | <0.001 |
| pT1b | 14,232 (31) | 134 (20) | |
| pT2 | 6,801 (15) | 98 (15) | |
| Tumor size, mean (SD), cm | 4.5 (2.7) | 3.8 (2.9) | <0.001 |
| Tumor grade | |||
| Well differentiated | 7,257 (16) | 222 (33) | <0.001 |
| Moderately differentiated | 22,762 (49) | 219 (32) | |
| Poorly differentiated | 9,342 (20) | 53 (8) | |
| Missing | 7,316 (16) | 184 (27) | |
| Surgical intervention | |||
| Partial nephrectomy | 13,276 (28) | 272 (40) | <0.001 |
| Radical nephrectomy | 33,401 (72) | 406 (60) |
All numbers within parentheses are percentages unless otherwise noted. Percentages may not add up to 100% because of missing data. The P values calculated from 2-sided t tests for continuous variables and chi-square tests for categorical variables as appropriate.