The team found that continuing with carfilzomib after KCD increased the time people lived without their myeloma coming back.
Method
Results of part 1
300 people joined this part. They were put into 1 of 2 treatment groups. Neither they or their doctor chose which group they were in.
Out of every 3 people who joined, 2 were in the carfilzomib group:
- 201 people had the combination treatment carfilzomib, cyclophosphamide and dexamethasone (KCD)
- 99 people had the combination treatment cyclophosphamide, bortezomib and dexamethasone (CVD)
After 24 weeks of treatment, the researchers looked at how well the combinations had worked.
For this the team wanted to know how many people’s myeloma had a complete response or a very good partial response. They measured the amount of certain proteins in the people’s blood sample and urine sample to find this out.
If no proteins were found in the samples after treatment, this was a complete response. If there were 10% or less of the proteins in the sample after treatment than before treatment, this was a very good partial response.
Those whose myeloma had a complete response or very good partial response was:
- just over 40 out of every 100 people (40.2%) in the KCD group
- just under 32 out of every 100 people (31.9%) in the CVD group
The total number of people whose myeloma had got better after treatment (overall response rate) was:
- 84 out of every 100 people (84%) in the KCD group
- just over 68 out of every 100 people (68.1%) in the CVD group
After an average follow up of 14 months, researchers looked at how long people in each group lived with no sign of their myeloma. They found it was:
- just under a year (11.9) for those who had KCD
- just over 10 months (10.2) for those who had CVD
Results of part 2
Only people who had KCD could join this part of the trial. Of the 201 people, 141 took part.
They were put into 1 of 2 groups (randomised):
- 69 people continued with carfilzomib
- 72 people didn’t continue with carfilzomib
After an average follow up of 10½ months, the team looked at how long people in each group lived with had no sign of their myeloma. They found it was:
- just under a year (11.9 months) for those who continued with carfilzomib
- just over 5½ months for those who didn’t continue with carfilzomib
Conclusion
The trial team concluded that continuing with carfilzomib increased the length of time people lived and had no sign of their myeloma after their initial treatment.
We have based this summary on information from the research team. The information they sent us has been reviewed by independent specialists (peer reviewed) but may not have been published in a medical journal. The figures we quote above were provided by the research team. We have not analysed the data ourselves.