PSA Standardization
Arguments Against Screening for Prostate Cancer
October 2009
The arguments against prostate cancer screening focus on the high rate of detection of indolent cancers with PSA and the overtreatment of tumors unlikely to cause mortality. There is a great amount of lead time bias such that it gives an illusion of improved survival.
Furthermore, because PSA does not have high specificity, a large number of prostate biopsies are performed to completely rule out cancer and there is morbidity associated with the cancer treatment, and less often, with the biopsies themselves. As noted in the recent clinical trials there is no conclusive evidence that screening improves patient outcomes.
Finally, there is significant cost associated with the downstream effect of an elevated PSA, including biopsies, repeat testing, and increased patient anxiety, all of which place further burden on the economic and healthcare system. While there are strong arguments for and against screening, at present it is apparent that for now PSA will continue to be utilized.
Against Screening |
Jump to section:
- Introduction
- Elevated PSA Result on Screening
- Reasons for Ordering PSA1
- PSA Screening in the News
- Recommendations for Screening
- Arguments for Screening for Prostate Cancer
- Recommendations for Not Screening
- Arguments Against Screening for Prostate Cancer
- PSA Sensitivity and Specificity
- High-Grade Prostate Cancer is Not Rare When PSA =4.0 ng/mL6
- Increase Specificity Using PSA Velocity8
- Optimizing Clinical Sensitivity and Specificity: Age/Ethnic Reference Intervals9,10
- Utilization of Free/Total PSA Ratio11
- Why Aren't PSA Results Interchangeable?
- Development of PSA Standards
- Development of PSA Standards
- Effect of Analytical Bias on Classification Based on Fixed Criteria
- Analytical Difference: Results per 1000 Patients Tested13
- Hybritech vs. WHO Standardized Assays12,14
- Analytical Differences15
- CAP Proficiency Testing
- WHO 96/670 Total PSA Preparations16
- WHO Calibration/Concordance at 3.1 ng/mL Cutoff5
- WHO Calibration/Concordance at 3.1 ng/mL Cutoff5
- WHO Calibration/Concordance at 4.0 ng/mL Cutoff5
- Clinical Differences in PSA Screening14
- The Clinical Difference
- Fixed Thresholds Produce Problems for Biopsy Recommendations
- Effect on "Watchful Waiting"
- Effect on "Watchful Waiting"
- Adding Biological Variability into the Mix
- Futures in Prostate Cancer Testing?
- PSA Testing at Mayo
- Conclusions
- References
- References
- Questions?


