Navigation Links
Many Phase 3 Cancer Drug Trials Yield Effective Medicines

Between a third and a half of these studies bring real clinical improvements, researchers say

MONDAY, March 24 (HealthDay News) -- From 25 percent to 50 percent of new cancer treatments tested in phase 3 randomized clinical trials are eventually found to be effective, say American researchers who analyzed data from 624 phase 3 trials involving more than 216,000 patients.

The trials were all conducted by U.S. National Cancer Institute-funded cooperative groups since 1955.

Dr. Benjamin Djulbegovic, of the H. Lee Moffitt Cancer Center and Research Institute at the University of South Florida in Tampa, and colleagues found that 30 percent of the trials had statistically significant results.

In 80 percent of those trials, new treatments were found to be superior to established treatments. The risk-benefit ratio favored new treatments in 41 percent of comparisons, and favored standard treatments in 59 percent of comparisons.

"The real effects of new treatments compared with standard treatments in terms of patient outcomes such as survival is best measured by quantitative pooling of data," the study authors wrote. "When done this way, new treatments are, on average, found to be slightly superior to standard treatments, with a five percent relative reduction in the death rate. This, of course, should not be understood as the average effects of new discoveries being equally spread among all patients."

The researchers also found that breakthrough therapies were discovered in 15 percent of the trials and, in two percent of cases, the breakthroughs reduced the death rate by more than 50 percent.

The study was published in the March 24 issue of the journal Archives of Internal Medicine. Two of the study co-authors received consulting fees and grant support from drug makers Sanofi-Aventis, AMGEN, and Eli Lilly and Company.

"In conclusion, society has received a good return on its investment in the cooperative oncology group system," which funds the trials, the study authors wrote. "The public can expect that about 25 percent to 50 percent of new cancer treatments that reach the stage of assessment in clinical trials will prove to be successful. This pattern of successes has become more consistent over time. However, our results also indicate that the absolute number of discoveries might be improved if the proportion of inconclusive trials is reduced."

Cancer is the second leading cause of death in the United States. Over the years, there have been continuous improvements made in survival and other outcomes, in large part due to the introduction of new treatments tested in clinical trials, according to background information in the study.

More information

The U.S. National Cancer Institute has more about cancer clinical trials.

-- Robert Preidt

SOURCE: JAMA/Archives journals, news release, March 24, 2008

Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Cancer treatments in phase 3 trials successful up to half of the time
2. Cardiome Announces Positive Interim Phase 2b Results for Oral Vernakalant and Engages Merrill Lynch as Strategic Advisor
3. MGH initiates phase I diabetes trial
4. Enrollment completed in 2 pivotal phase III studies of the investigational cancer drug vandetanib
5. Labopharm Initiates Phase III Clinical Trial for Twice-Daily Formulation of Tramadol-Acetaminophen
6. Akela Pharma initiates its first abuse deterrent opioid Phase I clinical trial
7. Affinium Pharmaceuticals, Ltd. Announces Initiation of a Phase I Clinical Trial for AFN-1252, its Novel Anti-staphylococcal Antibiotic
8. CEL-SCI CORPORATION Announces Results of 2008 Annual Meeting of Shareholders and Provides Update on Ground-breaking Activities Regarding Construction of Manufacturing Facility for Pivotal Phase III Cancer Trial
9. Bradmer announces Phase II results published in newly diagnosed glioblastoma which demonstrate improved survival and support upcoming Phase III study
10. Hyperion Therapeutics Announces Enrollment of First Patient in Phase 2 Clinical Trial in Patients With Hepatic Encephalopathy
11. Positive results from phase 1 clinical trials of cuprindro
Post Your Comments:
Related Image:
Many Phase 3 Cancer Drug Trials Yield Effective Medicines
(Date:11/27/2015)... ... November 27, 2015 , ... Keeping in ... for mental health and wellness consultation, has collaborated with a leading web-based marketplace ... knowledge gap experienced by parents and bring advice from parenting experts within their ...
(Date:11/27/2015)... ... , ... Avid collector, Andrew Hawley from Vintage Rock Posters, announces his search ... one of Joplin's most famous and beautiful concert posters. The concert was held on ... Arbor. The According to Hawley, "It is hard to believe that Joplin's stardom was ...
(Date:11/26/2015)... ON (PRWEB) , ... November 26, 2015 , ... ... of a real-time eReferral system for diagnostic imaging in the Waterloo region. Using ... BMD and Nuclear Medicine tests directly from their electronic medical record (EMR) without ...
(Date:11/26/2015)... ... ... PRMA Plastic Surgery is updating their record books yet again with an ... breast reconstruction surgery! , “What an accomplishment for the PRMA team, says Dr. ... an honor to have served all of these women.” , PRMA is one of ...
(Date:11/26/2015)... ... November 26, 2015 , ... Indosoft Inc., developer and ... an application server to improve system efficiency and reliability. , The new Q-Suite 6 ... these standards, the system avoids locking itself into a specific piece of software for ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... November 26, 2015 ... nieuwe aanpak combineert immunotherapie met Bremachlorin-photodynamische therapie ... ) --> ... (Photo: ) ... Medisch Centrum (LUMC) blijkt ...
(Date:11/26/2015)... DUBLIN , November 26, 2015 /PRNewswire/ ... the addition of the "2016 Future ... Drugs of Abuse Testing Market: Supplier Shares, ... report to their offering. --> ... of the "2016 Future Horizons and ...
(Date:11/26/2015)... 26, 2015 ... of the  "2016 Future Horizons and ... Drug Monitoring (TDM) Market: Supplier Shares, ... Opportunities"  report to their offering.  ... the addition of the  "2016 Future ...
Breaking Medicine Technology: