Making a case for patient-reported outcomes in clinical inflammatory bowel disease practice

Optimizing PROs for use in clinical trials: CD–PROs and UC–PROs

Developing standardized, validated instruments according to FDA guidance is a complex process. The lack of an FDA-approved PRO has resulted in substantial variability in the definitions of clinical response or remission in clinical trials to date.¹⁵ As a result, IBD-specific PROs (CD-PRO and UC-PRO) are being developed under FDA guidance for use in clinical trials.¹⁶ With achievement of prequalification for open use, UC-PRO and CD-PRO will cover five IBD-specific outcomes domains or modules: 1) bowel signs and symptoms, 2) systemic symptoms, 3) emotional impact, 4) coping behaviors, and 5) IBD impact on daily life. The bowel signs and symptoms module may also incorporate a functional impact assessment. Each module includes numerous pertinent items (e.g., “I feel worried,” “I feel scared,” “I feel alone” in the emotional impact module) and are currently being tailored and scored for practicality and relevance. It is hoped that UC-PRO and CD-PRO in final form will be relevant and applicable for clinical trials and gastroenterology practices alike.

Because the development of the UC-PRO and the CD-PRO is still underway, interim PROs are being used in ongoing clinical trials. These interim measures were extracted from existing components of the CDAI, Mayo Clinic Score, and UC Disease Activity Index. The CD PRO-2 consists of two items: abdominal pain and stool frequency. The UC PRO-2 is composed of rectal bleeding and stool frequency. The PRO-3 adds an item regarding general well-being. The sensitivity of these PROs was tested in studies for CD and UC. Both PROs performed similarly to their respective parent instrument. Important limitations include the lack of validation, and the fact that these interim measures were derived from parent measures with acknowledged limitations as previously discussed. Current clinical trials are coupling these interim measures with endoscopic data as coprimary endpoints.
 

PROs in routine clinical practice: Are we ready for prime time?

Few instruments developed to date have been widely implemented into routine IBD clinical practice. Table 1 highlights commonly available or recently developed PROs for IBD care. As clinicians strive to more effectively integrate PROs into clinical practice, we propose a three-step process to getting started: 1) select and administer a PRO instrument, 2) identify areas of impairment and create a targeted treatment strategy to focus on those areas, and 3) repeat the same PRO at follow-up to assess for improvement. The instrument can be administered before the visit or in the clinic waiting room. Focus a portion of the patient’s visit on discussing the results and identifying one or more domains to target for improvement. For example, the patient may indicate diarrhea as his/her most important area to target, triggering a symptom-specific investigation and therapeutic approach. The PRO may also highlight social or emotional impairment that may require an ancillary referral. The benefits of this PRO-driven approach to IBD care are twofold. First, the patient’s primary concerns are positioned at the forefront of the clinical visit. Second, aligning the clinician’s focus with the patient input may actually help to streamline each visit and improve overall visit efficiency and patient satisfaction.