Characteristics 

Log-Rank Test P

Cox Proportional Hazards Model

Comparison

Estimate (Std Err)

P

Hazard Ratio (95% CI)

Age (years)

N/A

N/A

-0.07 (0.04)

0.1120

0.94 (0.86-1.02)

Sex

0.3469

Male Vs. Female

-0.60 (0.65)

0.3540

0.55 (0.15-1.95)

Ethnicity

0.0532

Hispanic Vs. Non-Hispanic

-1.33 (0.74)

0.0716

0.26 (0.06-1.12)

American Indian/Alaskan native Vs. Unknown

16.10 (2482.16)

0.9948

9813679 (N/A)

Race

0.4516

Black Vs. Unknown

15.94 (2482.16)

0.9949

8357575 (N/A)

White Vs. Unknown

15.07 (2482.16)

0.9952

3490225 (N/A)

BMI (kg/m²)

N/A

 N/A

0.01 (0.04)

0.8300

1.01 (0.94-1.09)

Pathologic diagnosis

0.2399

Renal cell carcinoma Vs. Other

16.26 (2885.56)

0.9955

11502048 (N/A)

Laterality

0.8727

Left Vs. Right

-0.10 (0.65)

0.8724

0.90 (0.25-3.20)

Tumor enhancement

0.9842

Yes Vs. No

0.02 (0.89)

0.9843

1.02 (0.18-5.85)

Location

0.6509

Upper pole-anterior Vs Lower pole-posterior

-0.72 (1.23)

0.5573

0.49 (0.04-5.40)

Mid pole - anterior Vs. Lower pole - posterior

-1.94 (1.38)

0.1583

0.14 (0.01-2.13)

Lower pole - anterior Vs. Lower pole -posterior

-1.64 (1.09)

0.1310

0.19 (0.02-1.63)

Upper pole posterior Vs. Lower pole -posterior

-0.83 (1.02)

0.4130

0.43 (0.06-3.20)

Mid pole - posterior Vs. Lower pole - posterior

-1.13 (0.97)

0.2457

0.32 (0.05-2.17)

Exophytic? 

0.0762 

Yes Vs. No  

-1.06 (0.62) 

0.0884 

0.35 (0.10-1.17) 

Exophytic: > 50% or < 50% 

0.0565 

> 50% Vs. < 50% 

-1.88 (1.13) 

0.0953 

0.15 (0.02-1.39) 

Location relative to polar line 

Entirely above 

0.9024 

Yes Vs. No  

-0.08 (0.69) 

0.9025 

0.92 (0.24-3.57) 

Entirely below 

0.6469 

Yes Vs. No  

-0.36 (0.80) 

0.6487 

0.70 (0.15-3.32) 

Crosses polar line 

0.6218 

Yes Vs. No  

0.30 (0.61) 

0.6231 

1.35 (0.41-4.43) 

 > 50% across polar line 

0.8105 

Yes Vs. No  

-0.15 (0.63) 

0.8106 

0.86 (0.25-2.96) 

Crosses axial renal midline 

0.4179 

Yes Vs. No  

-0.55 (0.68) 

0.4234 

0.58 (0.15-2.20) 

Entirely between polar lines 

N/A 

N/A 

N/A 

N/A 

N/A 

Tumor size (cm) 

N/A 

N/A 

-0.54 (0.32) 

0.0900 

0.58 (0.31-1.09) 

Tumor distance from renal sinus (cm) 

N/A 

N/A

0.14 (0.16) 

0.3755 

1.15 (0.84-1.57) 

Tumor distance from skin (cm) 

N/A 

N/A 

-0.04 (0.07) 

0.5431 

0.96 (0.84-1.09) 

Initial ablation technique 

0.0266 

Cryoablation Vs. MWA 

1.46 (0.71) 

0.0412 

4.30 (1.06-17.42)