Adaptive trial design
11 important questions on Adaptive trial design
What are the disadvantages of a traditional trial to use a adaptive trial?
- Late recognition of efficacy
- Underpowered
- Inefficient use or resources = funding randomization
What can you adapt in an adaptive trial?
One or more aspects.
You can address these questions
• What is a safe dose? => dose
• Which treatment option is best? => treatments
• Which patients will benefit? => patients
• Does the treatment work?
What is the current/old used method to analyse the safe dose of medication?
When two or more patients experience side effects => trial is done.
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
What is the difference between the 3+3 method and continual re-assessment method?
- At the start of the study you make a model to predict toxicities, at different dose levels.
- The study is in different parts/groups => when one group is done you make a new model and base the dosis on the new model for the new group.
- This minimizing the number of patients exposed to too-low or too-high doses
- So the data of all patient is used => compared to only of the three before in the 3+3 model.
To investigate which treatment option is the best. What can you use?
- Multiple treatment and multiple changes in the treatments that are available
- You can stop one treatment when it is not effective
CONS= You have to set early endpoints.
2. Response adaptive randomization
You change the ratio based on the responses of the patients. The probability of getting the less effective drug becomes smaller and smaller.
What are pro's and cons of the response adaptive randomization trial?
- You prevent more harm
- You are more effective when you have multiple treatments and only one control.
- more complicated to explain to the patient and doctor
- Statistically difficult
- It can not be blinded
- What to do with outliners.
What is a covariate-adjusted response adaptive trial?
Randomization probability aligned to the biomarkers of the patient.
- So you have a group of people, they are divided based on biomarkers.
- You randomize patients to different treatments; based on a biomarker. => (so there is an idea about which patients (with certain biomarkers) will benefit form which treatment).
What are population enrichment studies?
=> you continue adding patients that probably will benefit.
- so that you do not add patients that wont benefit
- what are the stopping rules?
What is the goal of group sequential trials?
- Stop a trial early if there is enough evidence that the treatment works (efficacy) or does not work (lack of benefit)
- Predefined stopping rules => set a goal like you want 33% difference between placebo and treatment => during the interim analysis you evaluate.
What are general limitations for adaptive trial designs?
- Not possible with small and quick studies
- Not possible for long term endpoints >6 months.
What are ethical considerations for a adaptive trial?
- Understanding of doctors
- Understanding of patients => informed consent
- How much funding do you need => you dont know this beforehand
- Do doctors want to participate?
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
