Table 2 Comparison of pathological parameters among the three BMI groups.
Variable | Normal (n = 1000) | Overweight (n = 1096) | Obese (n = 445) | Overweight vs. Normal p value | Obese vs. Normal p value |
|---|---|---|---|---|---|
Pathological tumor diameter (mm), median (IQR) | 40 (23–50) | 39 (25–48) | 38 (25–50) | 0.31 | 0.21 |
pT stage, n (%) | 0.28 | 0.23 | |||
pT1a | 640 (64.0%) | 696 (63.5%) | 284 (63.8%) | ||
pT1b | 219 (21.9%) | 272 (24.8%) | 114 (25.6%) | ||
pT2a | 35 (3.5%) | 31 (2.8%) | 12 (2.7%) | ||
pT2b | 14 (1.4%) | 9 (0.8%) | 7 (1.6%) | ||
≥pT3 | 92 (9.2%) | 88 (8.0%) | 28 (6.3%) | ||
T3a | 65 | 68 | 25 | ||
T3b | 13 | 13 | 3 | ||
T3c | 5 | 1 | 0 | ||
T4 | 9 | 6 | 0 | ||
Nuclear grade, n (%) | 0.12 | <0.001 | |||
1 | 87 (8.7%) | 118 (10.8%) | 80 (18.0%) | ||
2 | 781 (78.1%) | 864 (78.8%) | 315 (70.8%) | ||
3 | 99 (9.9%) | 84 (7.7%) | 46 (10.3%) | ||
4 | 33 (3.3%) | 30 (2.7%) | 4 (0.9%) | ||
Renal capsular invasion, n (%) | 73 (7.3%) | 71 (6.5%) | 15 (3.4%) | 0.49 | <0.01 |
Perirenal fat/renal sinus fat invasion, n (%) | 54 (5.4%) | 59 (5.4%) | 13 (2.9%) | 1.00 | <0.05 |
Vein cancerous embolus, n (%) | 57 (5.7%) | 46 (4.2%) | 12 (2.7%) | 0.11 | <0.05 |
Microscopic/Segmental renal vein invasion | 52 | 37 | 11 | ||
Renal vein cancerous embolus | 8 | 15 | 3 | ||
Inferior vena cava cancerous embolus | 16 | 11 | 3 |
