Responding to criticism
The authors of the invited commentary questioned the definitions Dr. Halpern and colleagues used for undue or unjust inducement. “Among bioethicists, there is no consensus about what counts as undue inducement or an unjust distribution of research burdens. In this article, the authors have operationalized these constructs based on their own interpretations of undue and unjust inducement, which may not capture all the concerns that scholars have raised about inducement.”
Asked to respond to this and other criticisms raised in the commentary, Dr. Halpern said: “Did our study answer all possible questions about incentives? Absolutely not. But when it comes to incentives for research participation, an ounce of data is worth a pound of conjecture.”
There was agreement, however, that the findings could now put the onus on opponents of financial incentives for trial participants.
“I agree with the commentary’s authors that our study essentially shifts the burden of proof, such that, as they say, ‘those who would limit [incentives’] application may owe us an applicable criterion,’ ” Dr. Halpern said.
The authors of the invited commentary also criticized use of the study’s noninferiority design to rule out undue or unjust inducement. They note this design “may be unfamiliar to many bioethicists and can place substantial evaluative demands on readers.”
“As for the authors’ claim that noninferiority designs are difficult to interpret and unfamiliar to most clinicians and ethicists, I certainly agree,” Dr. Halpern said. “But that is hardly a reason to not employ the most rigorous methods possible to answer important questions.”
The study was supported by funding from the National Cancer Institute.
A version of this article first appeared on Medscape.com.