medical decision support medical decision support
Sign In

Nomogram of Walz et al for Predicting Prostate Cancer in a Man with a Serum PSA Less Than or Equal to 2.5 ng/mL

Description

Walz et al developed a nomogram for predicting the risk of prostate cancer in a man with a serum PSA less than or equal to 2.5 ng/mL. This is based on the percent free PSA and the digital rectal examination. The authors are from the University of Montreal, Paoli-Calmettes Institute (Marseilles), University Medical Centre Eppendorf, and Vita-Salute University (Milan).


 

Patient selection: male with serum PSA <= 2.5 ng/mL

 

Parameters:

(1) percent free PSA

(2) findings on digital rectal examination (DRE)

 

percent free PSA =

= (free serum PSA) / (total serum PSA) * 100%

 

points for percent free PSA =

= 100 - (percent free PSA as a whole number)

 

DRE Findings

Points

unremarkable

0

suspicious

13

 

total score =

= (points for percent free PSA) + (points for DRE)

 

Interpretation:

• minimum score: 0

• maximum score: 113

 

Total Points

Percent risk of prostate cancer being found on multiple needle biopsies

< 35

< 2.5%

35 to 113

(0.01031 * ((points)^2)) - (0.6755 * (points)) + 13.16

 


To read more or access our algorithms and calculators, please log in or register.

Specialty