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Effect of PSA Screening on Prostate Cancer Mortality Rate at 15-Years

by Jayashree Thakwani on April 9, 2024 at 2:58 PM
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Highlights:

Prostate cancer is a significant health concern globally, its incidence is steadily rising over the years with the global ageing population. Screening with a biomarker called prostate-specific antigen (PSA) has been a widely debated practice aiming to detect and treat prostate cancer early. However, the long-term efficacy and impact of PSA screening on reducing prostate cancer mortality have remained uncertain (1).


In a recent study, Martin et al conducted a secondary analysis clinical study to evaluate the effect of a single invitation for Prostate-specific antigen (PSA) screening on prostate cancer-specific mortality at a median 10-year follow-up, as compared to a study with no invitation for PSA screening.

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Prostate cancer ranks second as the most commonly occurring cancer and the fifth most important cause of cancer death among men worldwide. #Prostate #Cancer #medindia’

Prostate Cancer Trial: Study Design and Subjects

The study was a secondary analysis of the Cluster Randomized Trial of PSA Testing for Prostate Cancer (CAP). The primary aim of this study was to assess whether a single PSA screening invitation could reduce prostate cancer-specific mortality compared to no invitation.

This clinical study was conducted on men aged between 50 to 69 years, from primary care centers in England and Wales. These men were randomly assigned to either receive a single invitation for PSA screening or standard care without screening.

The study meticulously followed participants for a median of 15 years, evaluating outcomes such as prostate cancer mortality, all-cause mortality, and cancer stage and grade at diagnosis.

The enrollment of men was done between January 8, 2002, and January 20, 2009; the follow-up was completed on March 31, 2021.

Study on PSA Screening of Prostate Cancer: Results and Implications

The study included 415,357 men, of which 195,912 men belonged to the single invitation PSA Screening group, and 219,445 men to the control group, without PSA screening. At the median follow-up period of 15 years, 1,199 men (0.69%) in the single invitation group and 1,451 men in the control group (0.78%) died of prostate cancer.

The risk of death from prostate cancer was lower in the screening group (0.69%) compared to the control group (0.78%), indicating a small absolute mortality benefit.

Additionally, the screening intervention led to increased detection of low-grade and localized prostate cancers but did not significantly impact intermediate or high-grade tumors.

Although there was a reduction in mortality rate in groups with screening invitation, the absolute reduction in deaths was small.

With prostate cancer ranking as the second most commonly diagnosed cancer and the fifth leading cause of cancer-related deaths among men globally, understanding the role of PSA screening in mitigating its impact is paramount. This report serves as a vital contribution to the ongoing discourse surrounding prostate cancer management, offering valuable insights into the effectiveness of PSA screening as a tool for reducing mortality rates and ultimately improving outcomes for men affected by this disease.

Reference:
  1. Prostate-Specific Antigen Screening and 15-Year Prostate Cancer Mortality: A Secondary Analysis of the CAP Randomized Clinical Trial - (https:pubmed.ncbi.nlm.nih.gov/38581198/)

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