Developing the Medication Change Questionnaire.

OBJECTIVE: People who seek non-pharmaceutical interventions are often motivated by a desire to avoid or reduce orthodox medication. Effectiveness research in these areas needs to measure change in medication as an outcome. We set out to develop a data collection tool that is sensitive to changes in individual drug use over time.
METHOD: A multi-disciplinary team designed, piloted, and revised the Medication Change Questionnaire (MCQ) on two occasions, and used qualitative interviews to understand the patient's perspective and ensure that the final product accurately reflected the medication that patients were taking. Thirty patients in one general practice completed the questionnaire on two occasions and a purposive sample of 14 were interviewed. The design sought to enable patients to record all their ingested medication accurately, both prescription and over-the-counter drugs, over a period of 7 days. It was designed to be administered face-to face on the first occasion, and to be self-completed on subsequent occasions.
RESULTS: In considering in detail what medication was taken each day, the interview data fully correlated with the MCQ data in only one of the five people who were interviewed after completing the first draft of the questionnaire, but in eight of the nine people who completed the second draft. Of these eight people all but one had made some change to their medication, either by stopping or starting a drug, varying the dose of a drug or always taking one or more drugs in varying doses. The interviews demonstrated the complex and individual ways that people took their medicines, and the disparity between what was prescribed and what was actually taken. The qualitative data were also useful for reflecting on the potential advantages and disadvantages of other data collection methods, such as single medication questions and pill counts.
CONCLUSION: By involving patients at every level of research, we have developed a questionnaire that enables people to record their medication use accurately over a 7-day period, and to demonstrate changes in medication over time. Further work is required to assess its acceptability by different patient populations and its feasibility in terms of completion rates over longer periods of repeated use. We believe the MCQ to be an improvement over the variety of ad-hoc tools used in the past and it is freely available from the authors.