Dataset Information

Comparative Survival Outcomes of High-risk Prostate Cancer Treated with Radical Prostatectomy or Definitive Radiotherapy Regimens.

ABSTRACT:

Background

Observational data has indicated improved survival after radical prostatectomy (RP) compared with definitive radiotherapy (RT) in men with high-risk prostate cancer (PCa).

Objective

To compare PCa-specific mortality (PCSM) and overall mortality (OM) in men with high-risk PCa treated with RP or RT, providing information on target doses and fractionations.

Design setting and participants

This is an observational study from the Cancer Registry of Norway. Patients were diagnosed with high-risk PCa during 2006-2015, treated with RP ≤12 mo or RT ≤15 mo after diagnosis, and stratified according to RP or RT modality; external beam radiotherapy (EBRT; 70-<74, 74-<78, or 78 Gy), hypofractionated RT or EBRT combined with brachytherapy (BT-RT).

Outcome measurements and statistical analysis

Competing risk and Kaplan-Meier methods estimated PCSM and OM, respectively. Multivariable Cox regression models evaluated hazard ratios (HRs) for PCSM and OM.

Results and limitations

In total, 9254 patients were included (RP 47%, RT 53%). RT patients were older, had poorer performance status and more unfavorable disease characteristics. With a median follow-up time of seven and eight yrs, the overall 10-yr PCSM was 7.2% (95% confidence interval [CI] 6.4-8.0) and OM was 22.9% (95% CI 21.8-24.1). Compared with RP, EBRT 70-<74 Gy was associated with increased (HR 1.88, 95% CI 1.33-2.65, p < 0.001) and BT-RT with decreased (HR 0.49, 95% CI 0.24-0.96, p = 0.039) 10-yr PCSM. Patients treated with EBRT 70-78 Gy had higher adjusted 10-yr OM than those treated with RP.

Conclusions

In men with high-risk PCa, treatment with EBRT <74 Gy was associated with increased adjusted 10-yr PCSM and OM, and BT-RT with decreased 10-yr PCSM, compared with RP.

Patient summary

In this study, we compared mortality after radical prostatectomy (RP) and radiotherapy (RT) in men with high-risk prostate cancer (PCa); the results suggest that men receiving lower-dose RT have higher, and patients receiving brachytherapy may have lower, risk of death from PCa than patients treated with prostatectomy.

SUBMITTER: Aas K

PROVIDER: S-EPMC8317873 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BACKGROUND:Adjuvant (ART) and salvage radiotherapy (SRT) are two common concepts to enhance biochemical relapse free survival (BCRFS) in patients with prostate cancer (PC). We analyzed differences in outcome between ART and SRT in patients with steep decline of PSA-levels after surgery to compare outcome. METHODS:We evaluated 253 patients treated with postoperative RT with a median age of 66?years (range 42-85?years) treated between 2004 and 2014. Patients with additive radiotherapy due to PSA persistence and patients in the SRT group, who did not achieve a postoperative PSA level?<0.1?ng/mL were excluded. Hence, data of 179 patients was evaluated. We used propensity score matching to build homogenous groups. A Cox regression model was used to determine differences between treatment options. Median follow-up was 32.5?months (range 1.4-128.0?months). RESULTS:Early SRT at PSA levels <0.3?ng/mL was associated with significant longer BCRFS than late SRT (HR: 0.32, 95%-CI: 0.14-0.75, p =?0.009). Multiple Cox regression showed pre-RT PSA level, tumor stage, and Gleason score as predictive factors for biochemical relapse. In the overall group, patients treated with either ART or early SRT showed no significant difference in BCRFS (HR: 0.17, 95%-CI: 0.02-1.44, p =?0.1). In patients with locally advanced PC (pT3/4) BCRFS was similar in both groups as well (HR: 0.21, 95%-CI:0.02-1.79, p =?0.15). CONCLUSION:For patients with PSA-triggered follow-up, close observation is essential and early initiation of local treatment at low PSA levels (<0.3?ng/mL) is beneficial. Our data suggest, that SRT administered at early PSA rise might be equieffective to postoperative ART in patients with locally advanced PC. However, the individual treatment decision must be based on any adverse risk factors and the patients' postoperative clinical condition. STUDY REGISTRATION:The present work is approved by the Ethics Commission of the Technical University of Munich (TUM) and is registered with the project number 320/14.