Chism DB, Hanlon AL, Horwitz EM, Feigenberg SJ, Pollack A A comparison of the single and double factor high-risk models for risk assignment of prostate cancer treated with 3D conformal radiotherapy. Int J Radiat Oncol Biol Phys. 2004 Jun 1;59(2):380-5. doi: 10.1016/j.ijrobp.2003.10.059.
Kupelian PA, Reddy CA, Carlson TP, Altsman KA, Willoughby TR Preliminary observations on biochemical relapse-free survival rates after short-course intensity-modulated radiotherapy (70 Gy at 2.5 Gy/fraction) for localized prostate cancer. Int J Radiat Oncol Biol Phys. 2002 Jul 15;53(4):904-12. doi: 10.1016/s0360-3016(02)02836-5.
Kupelian PA, Reddy CA, Klein EA, Willoughby TR Short-course intensity-modulated radiotherapy (70 GY at 2.5 GY per fraction) for localized prostate cancer: preliminary results on late toxicity and quality of life. Int J Radiat Oncol Biol Phys. 2001 Nov 15;51(4):988-93. doi: 10.1016/s0360-3016(01)01730-8.
Kupelian PA, Thakkar VV, Khuntia D, Reddy CA, Klein EA, Mahadevan A Hypofractionated intensity-modulated radiotherapy (70 gy at 2.5 Gy per fraction) for localized prostate cancer: long-term outcomes. Int J Radiat Oncol Biol Phys. 2005 Dec 1;63(5):1463-8. doi: 10.1016/j.ijrobp.2005.05.054. Epub 2005 Sep 19.
Merrick GS, Butler WM, Wallner KE, Galbreath RW, Allen ZA, Adamovich E The impact of primary Gleason grade on biochemical outcome following brachytherapy for hormone-naive Gleason score 7 prostate cancer. Cancer J. 2005 May-Jun;11(3):234-40. doi: 10.1097/00130404-200505000-00010.
Roach M, Lu J, Pilepich MV, Asbell SO, Mohiuddin M, Terry R, Grignon D Four prognostic groups predict long-term survival from prostate cancer following radiotherapy alone on Radiation Therapy Oncology Group clinical trials. Int J Radiat Oncol Biol Phys. 2000 Jun 1;47(3):609-15. doi: 10.1016/s0360-3016(00)00578-2. Erratum In: Int J Radiat Oncol Biol Phys 2000 Aug 1;48(1):313. Mohuidden M [corrected to Mohiuddin M].
Sathya JR, Davis IR, Julian JA, Guo Q, Daya D, Dayes IS, Lukka HR, Levine M Randomized trial comparing iridium implant plus external-beam radiation therapy with external-beam radiation therapy alone in node-negative locally advanced cancer of the prostate. J Clin Oncol. 2005 Feb 20;23(6):1192-9. doi: 10.1200/JCO.2005.06.154.
Vargas C, Martinez A, Galalae R, Demanes J, Harsolia A, Schour L, Nuernberg N, Gonzalez J High-dose radiation employing external beam radiotherapy and high-dose rate brachytherapy with and without neoadjuvant androgen deprivation for prostate cancer patients with intermediate- and high-risk features. Prostate Cancer Prostatic Dis. 2006;9(3):245-53. doi: 10.1038/sj.pcan.4500882. Epub 2006 Jun 20.
Vargas C, Yan D, Kestin LL, Krauss D, Lockman DM, Brabbins DS, Martinez AA Phase II dose escalation study of image-guided adaptive radiotherapy for prostate cancer: use of dose-volume constraints to achieve rectal isotoxicity. Int J Radiat Oncol Biol Phys. 2005 Sep 1;63(1):141-9. doi: 10.1016/j.ijrobp.2004.12.017.
Vargas, C, Martinez, A, and Boike, T Long term survival benefit of a prospective dose escalation trial using high dose rate (HDR) brachytherapy boost. Int.J.Radiat.Oncol.Biol.Phys.2005. Ref Type: Abstract
Zietman AL, DeSilvio ML, Slater JD, Rossi CJ Jr, Miller DW, Adams JA, Shipley WU Comparison of conventional-dose vs high-dose conformal radiation therapy in clinically localized adenocarcinoma of the prostate: a randomized controlled trial. JAMA. 2005 Sep 14;294(10):1233-9. doi: 10.1001/jama.294.10.1233. Erratum In: JAMA. 2008 Feb 27;299(8):899-900.
A Phase II Study of Hypofractionated Image Guided Proton Radiation Therapy for Low and Intermediate Risk Adenocarcinoma of the Prostate
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.