Sequencing of Androgen-Deprivation Therapy of Short Duration With Radiotherapy for Nonmetastatic Prostate Cancer (SANDSTORM): A Pooled Analysis of 12 Randomized Trials.
Date
2023-02-01Author
Ma, TM
Sun, Y
Malone, S
Roach, M
Dearnaley, D
Pisansky, TM
Feng, FY
Sandler, HM
Efstathiou, JA
Syndikus, I
Hall, EC
Tree, AC
Sydes, MR
Cruickshank, C
Roy, S
Bolla, M
Maingon, P
De Reijke, T
Nabid, A
Carrier, N
Souhami, L
Zapatero, A
Guerrero, A
Alvarez, A
Gonzalez San-Segundo, C
Maldonado, X
Romero, T
Steinberg, ML
Valle, LF
Rettig, MB
Nickols, NG
Shoag, JE
Reiter, RE
Zaorsky, NG
Jia, AY
Garcia, JA
Spratt, DE
Kishan, AU
Meta-Analysis of Randomized Trials in Cancer of the Prostate (MARCAP) Consortium Investigators,
Type
Journal Article
Metadata
Show full item recordAbstract
PURPOSE: The sequencing of androgen-deprivation therapy (ADT) with radiotherapy (RT) may affect outcomes for prostate cancer in an RT-field size-dependent manner. Herein, we investigate the impact of ADT sequencing for men receiving ADT with prostate-only RT (PORT) or whole-pelvis RT (WPRT). MATERIALS AND METHODS: Individual patient data from 12 randomized trials that included patients receiving neoadjuvant/concurrent or concurrent/adjuvant short-term ADT (4-6 months) with RT for localized disease were obtained from the Meta-Analysis of Randomized trials in Cancer of the Prostate consortium. Inverse probability of treatment weighting (IPTW) was performed with propensity scores derived from age, initial prostate-specific antigen, Gleason score, T stage, RT dose, and mid-trial enrollment year. Metastasis-free survival (primary end point) and overall survival (OS) were assessed by IPTW-adjusted Cox regression models, analyzed independently for men receiving PORT versus WPRT. IPTW-adjusted Fine and Gray competing risk models were built to evaluate distant metastasis (DM) and prostate cancer-specific mortality. RESULTS: Overall, 7,409 patients were included (6,325 neoadjuvant/concurrent and 1,084 concurrent/adjuvant) with a median follow-up of 10.2 years (interquartile range, 7.2-14.9 years). A significant interaction between ADT sequencing and RT field size was observed for all end points (P interaction < .02 for all) except OS. With PORT (n = 4,355), compared with neoadjuvant/concurrent ADT, concurrent/adjuvant ADT was associated with improved metastasis-free survival (10-year benefit 8.0%, hazard ratio [HR], 0.65; 95% CI, 0.54 to 0.79; P < .0001), DM (subdistribution HR, 0.52; 95% CI, 0.33 to 0.82; P = .0046), prostate cancer-specific mortality (subdistribution HR, 0.30; 95% CI, 0.16 to 0.54; P < .0001), and OS (HR, 0.69; 95% CI, 0.57 to 0.83; P = .0001). However, in patients receiving WPRT (n = 3,049), no significant difference in any end point was observed in regard to ADT sequencing except for worse DM (HR, 1.57; 95% CI, 1.20 to 2.05; P = .0009) with concurrent/adjuvant ADT. CONCLUSION: ADT sequencing exhibits a significant impact on clinical outcomes with a significant interaction with field size. Concurrent/adjuvant ADT should be the standard of care where short-term ADT is indicated in combination with PORT.
Collections
Subject
Meta-Analysis of Randomized Trials in Cancer of the Prostate (MARCAP) Consortium Investigators
Research team
Clinic Acad RT Dearnaley
Clin Trials & Stats Unit
Language
eng
Date accepted
2022-07-12
License start date
2022-10-21
Citation
Journal of Clinical Oncology, 2022, pp. JCO2200970 -
Publisher
LIPPINCOTT WILLIAMS & WILKINS