TY - JOUR
T1 - Randomized controlled trial of early zoledronic acid in men with castration-sensitive prostate cancer and bone metastases
T2 - Results of CALGB 90202 (Alliance)
AU - Smith, Matthew R.
AU - Halabi, Susan
AU - Ryan, Charles J.
AU - Hussain, Arif
AU - Vogelzang, Nicholas
AU - Stadler, Walter
AU - Hauke, Ralph J.
AU - Monk, J. Paul
AU - Saylor, Philip
AU - Bhoopalam, Nirmala
AU - Saad, Fred
AU - Sanford, Ben
AU - Kelly, W. Kevin
AU - Morris, Michael
AU - Small, Eric J.
PY - 2014/4/10
Y1 - 2014/4/10
N2 - Purpose: Zoledronic acid decreases the risk for skeletal-related events (SREs) in men with castration-resistant prostate cancer and bone metastases but its role earlier in the natural history of the disease is unknown. This phase III study evaluated the efficacy and safety of earlier treatment with zoledronic acid in men with castration-sensitive metastatic prostate cancer. Patients and Methods: Men with castration-sensitive prostate cancer and bone metastases whose androgen-deprivation therapy was initiated within 6 months of study entry were randomly assigned in a blinded 1:1 ratio to receive zoledronic acid (4 mg intravenously every 4 weeks) or a placebo. After their disease progressed to castration-resistant status, all patients received open-label treatment with zoledronic acid. The primary end point was time to first SRE, defined as radiation to bone, clinical fracture, spinal cord compression, surgery to bone, or death as a result of prostate cancer. Target accrual was 680 patients. Primary analysis was planned after 470 SREs. The study was discontinued prematurely (645 patients; 299 SREs) after the corporate supporter withdrew study drug supply. Results: Early zoledronic acid was not associated with increased time to first SRE. The median time to first SRE was 31.9 months in the zoledronic acid group (95% CI, 24.2 to 40.3) and 29.8 months in the placebo group (95% CI, 25.3 to 37.2; hazard ratio, 0.97; 95% CI, 0 to 1.17; one-sided stratified log-rank P = .39). Overall survival was similar between the groups (hazard ratio, 0.88; 95% CI, 0.70 to 1.12; P = .29). Rates of adverse events were similar between the groups. Conclusion: In men with castration-sensitive prostate cancer and bone metastases, early treatment with zoledronic acid was not associated with lower risk for SREs.
AB - Purpose: Zoledronic acid decreases the risk for skeletal-related events (SREs) in men with castration-resistant prostate cancer and bone metastases but its role earlier in the natural history of the disease is unknown. This phase III study evaluated the efficacy and safety of earlier treatment with zoledronic acid in men with castration-sensitive metastatic prostate cancer. Patients and Methods: Men with castration-sensitive prostate cancer and bone metastases whose androgen-deprivation therapy was initiated within 6 months of study entry were randomly assigned in a blinded 1:1 ratio to receive zoledronic acid (4 mg intravenously every 4 weeks) or a placebo. After their disease progressed to castration-resistant status, all patients received open-label treatment with zoledronic acid. The primary end point was time to first SRE, defined as radiation to bone, clinical fracture, spinal cord compression, surgery to bone, or death as a result of prostate cancer. Target accrual was 680 patients. Primary analysis was planned after 470 SREs. The study was discontinued prematurely (645 patients; 299 SREs) after the corporate supporter withdrew study drug supply. Results: Early zoledronic acid was not associated with increased time to first SRE. The median time to first SRE was 31.9 months in the zoledronic acid group (95% CI, 24.2 to 40.3) and 29.8 months in the placebo group (95% CI, 25.3 to 37.2; hazard ratio, 0.97; 95% CI, 0 to 1.17; one-sided stratified log-rank P = .39). Overall survival was similar between the groups (hazard ratio, 0.88; 95% CI, 0.70 to 1.12; P = .29). Rates of adverse events were similar between the groups. Conclusion: In men with castration-sensitive prostate cancer and bone metastases, early treatment with zoledronic acid was not associated with lower risk for SREs.
UR - http://www.scopus.com/inward/record.url?scp=84901944163&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901944163&partnerID=8YFLogxK
U2 - 10.1200/JCO.2013.51.6500
DO - 10.1200/JCO.2013.51.6500
M3 - Article
C2 - 24590644
AN - SCOPUS:84901944163
VL - 32
SP - 1143
EP - 1150
JO - Journal of Clinical Oncology
JF - Journal of Clinical Oncology
SN - 0732-183X
IS - 11
ER -