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Surgery for Obesity and Related Diseases


Background: The Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2- RF) has empirically validated utility in presurgical psychological evaluations of bariatric surgery patients. However, clinicians may prefer shorter, symptom-focused measures. Objectives: The purpose of the present study is to evaluate the feasibility and potential administration time savings of a proposed flexible and conditional (FCA) administration of the MMPI-2-RF in presurgical evaluations of bariatric surgery candidates. Setting: Bariatric surgery candidates evaluated at a large hospital as well as a private practice in the Midwest. Methods: MMPI-2-RF scores were available for a total of 4099 adult bariatric surgery candidates from 2 separate samples. The hospital sample included 911 males and 2430 females. The average BMI was 49.3 kg/m2 (SD=11.0). The private practice sample included 105 males, 640 females, and 13 individuals who did not report gender. The average BMI was 48.8 kg/m2 (SD=8.4). The authors used a simulation design in which existing MMPI-2-RF responses were used to simulate an FCA administration. Results: The findings indicated that an FCA of the MMPI-2-RF closely approximates the amount of information typically gained from a full administration of the test in the 2 samples of bariatric surgery candidates. Items savings and estimated time savings ranged from 44% to 88% in both samples, depending on the number of conditionally administered scales. Conclusions: The present study supports the feasibility of an FCA of the MMPI-2-RF, potentially shortening administration time and reducing patient burden. However, the findings are limited because the accuracy and time savings are based on a simulation, not actual FCA administrations

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