Table 12.
Case example utilizing method 2, cut-point 1
| Prob. .41/1-.41 = -0.16 | Patients value | Parameter estimate | Pt. value *Parameter estimate | Intercept |
|---|---|---|---|---|
| HGB |
15.2 |
-0.378 |
-5.74 |
-5.10 |
| RBC |
4.50 |
-0.764 |
-3.44 |
|
| Black |
(Yes=1) 0 |
0.361 |
0.00 |
|
| Age |
60 |
0.018 |
1.08 |
|
| PSA |
4.3 |
0.033 |
0.129 |
|
| Creatinine |
1.65 |
-0.601 |
-0.99 |
|
| MCV |
90.00 |
0.050 |
4.5 |
|
| |
|
sum of B*value |
2.42 |
|
| Plus intercept=Sum | -2.68 |
The probability of this cut-point is .41, therefore the Log OR p/1 – p = .41/1-.41, thus the cut-point is −0.16. (If the number yielded from the equation is above this value, the patient should be referred for prostate biopsy). The patient is a 60 year old, Caucasian male with a recent PSA test value of 4.3 ng/dL. In addition, he had additional lab work to include a HGB, RBC count, MCV, Creatinine, and a negative test for Hematuria. Utilizing method 2, cut-point 1, the Patient’s PBCDR total sum is -2.68, which is less than -0.16. Therefore, the recommendation is no biopsy for the patient.