Patient Participation in Forensic Psychiatric Care: The Initial Development and Content Validity of a New Instrument.

Only 16 patients evaluated the instrument, and all were male because no female patients were on the wards during data collection. The study tested only initial relevance and answer consistency; it did not complete further psychometric testing with a larger group. Thirteen items showed ceiling effects, so they did not distinguish patients well. Seven items were below the relevance threshold and two were below the clarity threshold. The exclusion of severely cognitively affected patients was vague, and participants' cognitive abilities were not assessed, so some may not have understood the task. The work was done in two Swedish medium-security clinics during the COVID-19 pandemic, so it may not apply to other services. Patients may have answered positively because they hoped the instrument would improve their care or please the researchers.

Do not treat the questionnaire as ready for clinical use. The overall relevance score was 0.86, below the recommended 0.90, seven items scored below 0.78 for relevance, and testing was done with 16 male patients in Sweden.