Treatment-Seeking/No Recycling
We do not allow participants to enroll in clinical trials at Adams Clinical if they have ever enrolled in a prior trial with an investigational medication. This measure is a blunt tool to ensure data integrity, and is predicated on the hypothesis that people seeking paid clinical trials who happen to suffer from illness may be different from people willing to enter a clinical trial because they are seeking treatment for a specific illness. Studies examining the differences between these groups have been inconclusive. Despite the lack of consensus, some trial protocols exclude participants based on the number of prior trials in which they have participated. We adopt a more conservative approach and exclude participants after even a single prior trial.
Participant Validity
- We recruit via social media, not advertisements targeted at lower income neighborhoods. We rule out people whose primary enrollment goal is financial compensation.
- Rather than following the industry-wide recruitment standard of advertising broadly for clinical trial volunteers and then asking what conditions they have, we advertise to people currently experiencing psychiatric or neurologic symptoms and educate them about clinical research. We believe this recruitment approach makes our participant sample more similar to a patient practice than those seen at other research facilities.
- We have two clinicians perform an independent review of subjects through our own interview, similar to the guidelines of MGH’s SAFER criteria.
Neutral Doctor-Participant Interactions
The way in which a doctor and participant interact can significantly inflate placebo response, so we have implemented procedures to minimize this problem.
- We limit the time participants spend on site.
- Our office is setup physically to minimize interaction.
- We limit visits to only those necessary per the study protocol.
Rater Training/Inter-rater Reliability
Since more reliable outcome measures can reduce sample size requirements, we conduct weekly inter-rater reliability trainings to calibrate the way our clinicians score interviews. With a participant’s permission, one clinical interview is audio-recorded each week and played in its entirety in front of the full clinical team. Each member of the clinical team will score the interview, and then reveal their scoring decisions and discusses differences in interpretation. Before a clinical rater works on industry-sponsored protocols at Adams Clinical, he or she must repeatedly demonstrate scoring results highly consistent with the team.
Leon AC, Marzak PM: More reliable outcome measures can reduce sample size requirements. Arch Gen Psychiatry 1995, 52:867–871. 4. Regier DA, Kaelber CT, Rae DS, Farmer ME, Knauper B, Kessler RC, Norquist GS: Limitations of diagnostic and assessment instruments for mental disorders. Arch Gen Psychiatry 1998, 55:109–115. 5. Muller MJ, Szegedi A: Effects of interrater reliability of psychopathologic assessment on power and sample size calculations in clinical trials.