Skip to main content
. Author manuscript; available in PMC: 2024 Apr 1.
Published in final edited form as: Urology. 2022 Dec 24;174:42–47. doi: 10.1016/j.urology.2022.12.014

Table 2:

Cox Proportional Hazard's Model - Modeling the Hazard of 2nd Stone

Variable Hazard's Ratio 95%
Lower
95% Upper p-value
Initial Procedure: SWL vs. URS 1.63 1.58 1.68 <0.001
Female vs. Male 1.17 1.13 1.20 <0.001
Age: 10-year increase 1.05 1.04 1.06 <0.001
Inflammatory Bowel Disease 1.36 1.23 1.51 <0.001
Diabetes 1.25 1.20 1.31 <0.001
Gout 1.19 1.07 1.32 0.001
Morbid Obesity 1.28 1.20 1.37 <0.001
Neurogenic Bladder 1.40 1.19 1.65 0.002
Paralysis 1.66 1.41 1.95 <0.001
Multiple Sclerosis 1.14 0.96 1.35 0.363
Hypertension 1.11 1.07 1.15 <0.001
Coronary Artery Disease 1.04 0.98 1.11 0.179
Region: North Central vs. Northeast 0.82 0.78 0.86 <0.001
Region: South vs. Northeast 0.82 0.79 0.86 <0.001
Region: West vs. Northeast 0.72 0.67 0.76 <0.001
Region: Unknown vs. Northeast 0.75 0.67 0.85 <0.001
SWL Subset URS Subset
Variable HR (95% CI) p-
value
HR (95% CI) p-value
Female vs. Male 1.11 (1.06, 1.15) <0.001 1.30 (1.23, 1.36) <0.001
Age: 10-year increase 1.06 (1.04, 1.07) <0.001 1.05 (1.03, 1.07) <0.001
Inflammatory Bowel Disease 1.23 (1.06, 1.43) 0.006 1.53 (1.31, 1.78) <0.001
Diabetes 1.28 (1.21, 1.35) <0.001 1.24 (1.15, 1.34) <0.001
Gout 1.18 (1.03, 1.35) 0.020 1.22 (1.03, 1.45) 0.022
Morbid Obesity 1.31 (1.19, 1.44) <0.001 1.31 (1.17, 1.46) <0.001
Neurogenic Bladder 1.14 (0.90, 1.46) 0.281 1.56 (1.21, 2.00) <0.001
Paralysis 1.95 (1.54, 2.45) <0.001 1.66 (1.29, 2.14) <0.001
Multiple Sclerosis 1.05 (0.82, 1.33) 0.714 1.13 (0.87, 1.47) 0.364
Hypertension 1.10 (1.05, 1.15) <0.001 1.14 (1.07, 1.21) <0.001
Coronary Artery Disease 1.06 (0.98, 1.15) 0.131 1.02 (0.92, 1.12) 0.746
Region: North Central vs. Northeast 0.79 (0.74, 0.85) <0.001 0.86 (0.79, 0.93) <0.001
Region: South vs. Northeast 0.79 (0.74, 0.83) <0.001 0.86 (0.80, 0.93) <0.001
Region: West vs. Northeast 0.67 (0.62, 0.73) <0.001 0.77 (0.69, 0.85) <0.001
Region: Unknown vs. Northeast 0.70 (0.60, 0.82) <0.001 0.86 (0.71, 1.04) 0.111