Reinier Timman1, Clazien Bouwmans2, Jan J V Busschbach3, Leona Hakkaart-van Roijen2. 1. Department of Psychiatry, Section of Medial Psychology and Psychotherapy, Erasmus University Medical Centre, Rotterdam, The Netherlands; Viersprong Institute for Study on Personality Disorders, Halsteren, The Netherlands. Electronic address: r.timman@erasmusmc.nl. 2. Institute for Medical Technology Assessment, Erasmus University, Rotterdam, The Netherlands. 3. Department of Psychiatry, Section of Medial Psychology and Psychotherapy, Erasmus University Medical Centre, Rotterdam, The Netherlands; Viersprong Institute for Study on Personality Disorders, Halsteren, The Netherlands.
Abstract
BACKGROUND: Medical costs of (psychiatric) illness can be validly measured with patient report questionnaires. These questionnaires comprise many detailed items resulting in lengthy administrations. OBJECTIVES: We set out to find the minimal number of items needed to retrieve 80% and 90% of the costs as measured by the Treatment Inventory of Costs in Patients with psychiatric disorders (TIC-P). METHODS: The TIC-P is a validated patient-reported outcome measure concerning the utilization of medical care and productivity losses. The present study focused on direct medical costs. We applied data of 7756 TIC-P administrations from three studies in patients with mental health care issues. Items that contribute least to the total cost were eliminated, providing that 80% and 90% of the total cost was retained. RESULTS: Average medical costs per patient were €658 over the last 4 weeks. The distribution of cost was highly skewed, and 5 of the 14 items of the TIC-P accounted for less than 10% of the total costs. The 80% Mini version of the TIC-P required five items: ambulatory services, private practice, day care, general hospital, and psychiatric clinic. The TIC-P Midi 90% inventory required eight items. Both had variance between the three samples in the optimal choice of the items. CONCLUSIONS: The number of items of the TIC-P can be reduced considerably while maintaining 80% and 90% of the medical costs estimated by the complete TIC-P. The reduced length makes the questionnaire more suitable for routine outcome monitoring.
BACKGROUND: Medical costs of (psychiatric) illness can be validly measured with patient report questionnaires. These questionnaires comprise many detailed items resulting in lengthy administrations. OBJECTIVES: We set out to find the minimal number of items needed to retrieve 80% and 90% of the costs as measured by the Treatment Inventory of Costs in Patients with psychiatric disorders (TIC-P). METHODS: The TIC-P is a validated patient-reported outcome measure concerning the utilization of medical care and productivity losses. The present study focused on direct medical costs. We applied data of 7756 TIC-P administrations from three studies in patients with mental health care issues. Items that contribute least to the total cost were eliminated, providing that 80% and 90% of the total cost was retained. RESULTS: Average medical costs per patient were €658 over the last 4 weeks. The distribution of cost was highly skewed, and 5 of the 14 items of the TIC-P accounted for less than 10% of the total costs. The 80% Mini version of the TIC-P required five items: ambulatory services, private practice, day care, general hospital, and psychiatric clinic. The TIC-P Midi 90% inventory required eight items. Both had variance between the three samples in the optimal choice of the items. CONCLUSIONS: The number of items of the TIC-P can be reduced considerably while maintaining 80% and 90% of the medical costs estimated by the complete TIC-P. The reduced length makes the questionnaire more suitable for routine outcome monitoring.
Authors: Pieter J Rohrbach; Alexandra E Dingemans; Philip Spinhoven; Elske Van den Akker-Van Marle; Joost R Van Ginkel; Marjolein Fokkema; Markus Moessner; Stephanie Bauer; Eric F Van Furth Journal: Trials Date: 2019-08-16 Impact factor: 2.279
Authors: Astrid Langergaard; Kim Mathiasen; Jesper Søndergaard; Sabrina S Sørensen; Sidsel L Laursen; Alexander A P Xylander; Mia B Lichtenstein; Lars H Ehlers Journal: Internet Interv Date: 2022-02-19
Authors: Pieter J Rohrbach; Alexandra E Dingemans; Eric F van Furth; Philip Spinhoven; Joost R van Ginkel; Stephanie Bauer; M Elske van den Akker-Van Marle Journal: Int J Eat Disord Date: 2022-06-23 Impact factor: 5.791