Development of a Patient Reported Outcome Measure for GastroIntestinal Recovery

Overview

People who undergo surgery, or develop intestinal obstruction will spend a period of time without normal bowel function. This might extend beyond the normal measures of passage of flatus or tolerance of diet. This study will take a three stage approach to develop a patient reported outcome measure for gastrointestinal recovery. Stage 1: Qualitative interviews with 20-40 patients who have undergone major abdominal surgery, or conservatively managed intestinal obstruction. These interviews will identify key themes and ideas to develop the questionnaire. Stage 2: Face validity testing of questionnaire with 20 patients, using the QQ-10 questionnaire to aid assessment. The questionnaire may be edited after this. Stage 3: 250-500 patients will be asked to complete the questionnaire following surgery or treatment for intestinal obstruction. Basic demographics will also be collated. Item reduction and scale refinement will be undertaken using this dataset. This will provide a PROM of gastrointestinal recovery which is ready for validation.

Gastrointestinal dysfunction is commonly seen after surgery, and also manifests itself in intestinal obstruction. During this time, the patient may experience a range of symptoms of acute intestinal failure, including loss of motility and absorption. These may resolve at different rates during the period of gastrointestinal recovery. Trials in the area have conflicting results, partly due to the selection of clinician reported unidimensional outcomes. There is a clear need for a patient reported outcome measure (PROM) to record gastrointestinal recovery. Aims and Objectives * To develop a PROM for gastrointestinal recovery. * To identify a candidate long-list of items for inclusion in a PROM through semi-structured patient interviews, and test face validity with patients and an expert panel * To develop a PROM using the approved long list Methods This study will be conducted in three stages with reference to FDA (Food and Drug Administration) and ISOQoL (International Society for Quality of Life Research) guidelines. Stage 1: Five centres will undertake purposive sampling to identify patients who have undergone major intraabdominal surgery (including gastrointestinal, urological, and gynaecological) and patients treated for intestinal obstruction. It is expected that 40-60 participants will undergo a semi-structured interview to identify important items related to recovery of gastrointestinal function in order to reach thematic saturation. Interviews will be transcribed and coded using a framework methodology. This will generate allow us to construct a prototype questionnaire with an initial pool of items. Stage 2: The prototype questionnaire will be shown to a group of international experts in gastrointestinal recovery for assessment of face validity, using the QQ-10 (Questionnaire quality-10 item) questionnaire. This will then be tested with 20 patients treated for eligible conditions at five participating centres using the QQ-10. Stage 3: Upto 500 participants (depending on number of items on the questionnaire) will be recruited from 10 centres which offer gastrointestinal, urological, and gynaecological surgery. Participants will rate items on a Likert scale. Items will undergo factor analysis to reduce the number of items. This will present a shorter questionnaire with finalised scales.