RT Journal A1 Wittes RE T1 THe cost to patients of participating in clinical trials-reply JF JAMA JO JAMA YR 1989 FD February 24 VO 261 IS 8 SP 1151 OP 1151 DO 10.1001/jama.1989.03420080064025 UL http://dx.doi.org/10.1001/jama.1989.03420080064025 AB In Reply.—  The fact that most insurance contracts explicitly exclude the patient-care costs of clinical trials of investigational agents is an important disincentive for physicians and patients to participate in trials. The extent to which insurance companies enforce the research exclusion is variable, but there are disquieting signs that this tendency is increasing. The National Cancer Institute, together with concerned investigators and members of public interest groups, has begun a dialogue with segments of the insurance industry that will, we hope, lead to a continuation of the productive working relationship that has existed for years and enabled the entry of suitable patients into clinical trials.Despite this obstacle, however, many important trials in oncology are conducted with conventional agents (for example, most breast adjuvant studies). Most clinical investigators have experienced little or no problem with insurance reimbursement to patients in trials where no investigational drug is involved. Currently, the cooperative