Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer?

L. E. Howard, A. M. De Hoedt, W. J. Aronson, C. J. Kane, C. L. Amling, M. R. Cooperberg, M. K. Terris, C. H. Divers, A. Valderrama, S. J. Freedland

Research output: Contribution to journalArticle

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Abstract

Background:Skeletal-related events (SREs) including pathologic fracture, spinal cord compression, radiation to bone and surgery to bone, are common in men with bone metastatic castration-resistant prostate cancer (mCRPC). Men with mCRPC are at high risk of death. Whether SREs predict mortality is unclear. We tested the association between SREs and overall survival (OS) in a multiethnic cohort with bone mCRPC, controlling for key covariates unavailable in claims data such as bone pain, number of bone metastases and PSA doubling time (PSADT).Methods:We collected data on 233 men diagnosed with nonmetastatic castration-resistant prostate cancer (CRPC) in 2000-2013 at two Veterans Affairs hospitals who later progressed to bone metastases. First occurrence of SRE and OS were collected from the medical records. Cox models were used to test the association between SRE and OS, treating SRE as a time-dependent variable. We adjusted for age, year, race, treatment center, biopsy Gleason, primary treatment to the prostate, PSA, PSADT, months from androgen deprivation therapy to CRPC, months from CRPC to metastasis and number of bone metastases at initial bone metastasis diagnosis. In a secondary analysis, we also adjusted for bone pain.Results:During follow-up, 88 (38%) patients had an SRE and 198 (85%) died. After adjusting for risk factors, SRE was associated with increased mortality (hazard ratio (HR)=1.67; 95% confidence interval (CI) 1.22-2.30; P=0.001). When bone pain was added to the model, the association of SREs and OS was attenuated, but remained significant (HR=1.42; 95% CI 1.01-1.99; P=0.042).Conclusions:SREs are associated with increased mortality in men with bone mCRPC. Further studies on the impact of preventing SREs to increase survival are warranted.

Original languageEnglish (US)
Pages (from-to)380-384
Number of pages5
JournalProstate Cancer and Prostatic Diseases
Volume19
Issue number4
DOIs
StatePublished - Dec 1 2016

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Castration
Prostatic Neoplasms
Bone and Bones
Survival
Neoplasm Metastasis
Pain
Mortality
Confidence Intervals
Veterans Hospitals
Spontaneous Fractures
Spinal Cord Compression
Proportional Hazards Models
Androgens
Medical Records
Prostate
Therapeutics
Radiation

ASJC Scopus subject areas

  • Oncology
  • Urology
  • Cancer Research

Cite this

Howard, L. E., De Hoedt, A. M., Aronson, W. J., Kane, C. J., Amling, C. L., Cooperberg, M. R., ... Freedland, S. J. (2016). Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer? Prostate Cancer and Prostatic Diseases, 19(4), 380-384. https://doi.org/10.1038/pcan.2016.26

Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer? / Howard, L. E.; De Hoedt, A. M.; Aronson, W. J.; Kane, C. J.; Amling, C. L.; Cooperberg, M. R.; Terris, M. K.; Divers, C. H.; Valderrama, A.; Freedland, S. J.

In: Prostate Cancer and Prostatic Diseases, Vol. 19, No. 4, 01.12.2016, p. 380-384.

Research output: Contribution to journalArticle

Howard, LE, De Hoedt, AM, Aronson, WJ, Kane, CJ, Amling, CL, Cooperberg, MR, Terris, MK, Divers, CH, Valderrama, A & Freedland, SJ 2016, 'Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer?', Prostate Cancer and Prostatic Diseases, vol. 19, no. 4, pp. 380-384. https://doi.org/10.1038/pcan.2016.26
Howard, L. E. ; De Hoedt, A. M. ; Aronson, W. J. ; Kane, C. J. ; Amling, C. L. ; Cooperberg, M. R. ; Terris, M. K. ; Divers, C. H. ; Valderrama, A. ; Freedland, S. J. / Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer?. In: Prostate Cancer and Prostatic Diseases. 2016 ; Vol. 19, No. 4. pp. 380-384.
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title = "Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer?",
abstract = "Background:Skeletal-related events (SREs) including pathologic fracture, spinal cord compression, radiation to bone and surgery to bone, are common in men with bone metastatic castration-resistant prostate cancer (mCRPC). Men with mCRPC are at high risk of death. Whether SREs predict mortality is unclear. We tested the association between SREs and overall survival (OS) in a multiethnic cohort with bone mCRPC, controlling for key covariates unavailable in claims data such as bone pain, number of bone metastases and PSA doubling time (PSADT).Methods:We collected data on 233 men diagnosed with nonmetastatic castration-resistant prostate cancer (CRPC) in 2000-2013 at two Veterans Affairs hospitals who later progressed to bone metastases. First occurrence of SRE and OS were collected from the medical records. Cox models were used to test the association between SRE and OS, treating SRE as a time-dependent variable. We adjusted for age, year, race, treatment center, biopsy Gleason, primary treatment to the prostate, PSA, PSADT, months from androgen deprivation therapy to CRPC, months from CRPC to metastasis and number of bone metastases at initial bone metastasis diagnosis. In a secondary analysis, we also adjusted for bone pain.Results:During follow-up, 88 (38{\%}) patients had an SRE and 198 (85{\%}) died. After adjusting for risk factors, SRE was associated with increased mortality (hazard ratio (HR)=1.67; 95{\%} confidence interval (CI) 1.22-2.30; P=0.001). When bone pain was added to the model, the association of SREs and OS was attenuated, but remained significant (HR=1.42; 95{\%} CI 1.01-1.99; P=0.042).Conclusions:SREs are associated with increased mortality in men with bone mCRPC. Further studies on the impact of preventing SREs to increase survival are warranted.",
author = "Howard, {L. E.} and {De Hoedt}, {A. M.} and Aronson, {W. J.} and Kane, {C. J.} and Amling, {C. L.} and Cooperberg, {M. R.} and Terris, {M. K.} and Divers, {C. H.} and A. Valderrama and Freedland, {S. J.}",
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T1 - Do skeletal-related events predict overall survival in men with metastatic castration-resistant prostate cancer?

AU - Howard, L. E.

AU - De Hoedt, A. M.

AU - Aronson, W. J.

AU - Kane, C. J.

AU - Amling, C. L.

AU - Cooperberg, M. R.

AU - Terris, M. K.

AU - Divers, C. H.

AU - Valderrama, A.

AU - Freedland, S. J.

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Background:Skeletal-related events (SREs) including pathologic fracture, spinal cord compression, radiation to bone and surgery to bone, are common in men with bone metastatic castration-resistant prostate cancer (mCRPC). Men with mCRPC are at high risk of death. Whether SREs predict mortality is unclear. We tested the association between SREs and overall survival (OS) in a multiethnic cohort with bone mCRPC, controlling for key covariates unavailable in claims data such as bone pain, number of bone metastases and PSA doubling time (PSADT).Methods:We collected data on 233 men diagnosed with nonmetastatic castration-resistant prostate cancer (CRPC) in 2000-2013 at two Veterans Affairs hospitals who later progressed to bone metastases. First occurrence of SRE and OS were collected from the medical records. Cox models were used to test the association between SRE and OS, treating SRE as a time-dependent variable. We adjusted for age, year, race, treatment center, biopsy Gleason, primary treatment to the prostate, PSA, PSADT, months from androgen deprivation therapy to CRPC, months from CRPC to metastasis and number of bone metastases at initial bone metastasis diagnosis. In a secondary analysis, we also adjusted for bone pain.Results:During follow-up, 88 (38%) patients had an SRE and 198 (85%) died. After adjusting for risk factors, SRE was associated with increased mortality (hazard ratio (HR)=1.67; 95% confidence interval (CI) 1.22-2.30; P=0.001). When bone pain was added to the model, the association of SREs and OS was attenuated, but remained significant (HR=1.42; 95% CI 1.01-1.99; P=0.042).Conclusions:SREs are associated with increased mortality in men with bone mCRPC. Further studies on the impact of preventing SREs to increase survival are warranted.

AB - Background:Skeletal-related events (SREs) including pathologic fracture, spinal cord compression, radiation to bone and surgery to bone, are common in men with bone metastatic castration-resistant prostate cancer (mCRPC). Men with mCRPC are at high risk of death. Whether SREs predict mortality is unclear. We tested the association between SREs and overall survival (OS) in a multiethnic cohort with bone mCRPC, controlling for key covariates unavailable in claims data such as bone pain, number of bone metastases and PSA doubling time (PSADT).Methods:We collected data on 233 men diagnosed with nonmetastatic castration-resistant prostate cancer (CRPC) in 2000-2013 at two Veterans Affairs hospitals who later progressed to bone metastases. First occurrence of SRE and OS were collected from the medical records. Cox models were used to test the association between SRE and OS, treating SRE as a time-dependent variable. We adjusted for age, year, race, treatment center, biopsy Gleason, primary treatment to the prostate, PSA, PSADT, months from androgen deprivation therapy to CRPC, months from CRPC to metastasis and number of bone metastases at initial bone metastasis diagnosis. In a secondary analysis, we also adjusted for bone pain.Results:During follow-up, 88 (38%) patients had an SRE and 198 (85%) died. After adjusting for risk factors, SRE was associated with increased mortality (hazard ratio (HR)=1.67; 95% confidence interval (CI) 1.22-2.30; P=0.001). When bone pain was added to the model, the association of SREs and OS was attenuated, but remained significant (HR=1.42; 95% CI 1.01-1.99; P=0.042).Conclusions:SREs are associated with increased mortality in men with bone mCRPC. Further studies on the impact of preventing SREs to increase survival are warranted.

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