Abstract
The Minnesota Multiphasic Personality Inventory (MMPI) family of instruments has been commonly used for the evaluation of patients seeking surgical intervention for back pain. A new version of the MMPI, the Minnesota Multiphasic Personality Inventory-3 (MMPI-3), has been released with updated normative data, expanded and revised item content, and updated scales. The purpose of this investigation is to report reliability and validity findings for MMPI-3 scale scores of patients seeking spine surgery. Using a sample of 761 spine surgery candidates (390 men and 371 women), descriptive data, reliability and standard error of measurement, and zero-order correlations using external criteria (self-report and information gathered from a medical record review/clinical interview) were calculated. By and large, men and women produced MMPI-3 scale scores that were similar with a few exceptions. Many reliability estimates and standard errors of measurement were replicable compared to those reported for the MMPI-3 normative sample for scales that yielded adequate range. The scale scores of the MMPI-3 also yielded evidence of good convergent and discriminant validity when correlated with external criteria. Indeed, MMPI-3 scale scores accounted for 2%-15% of incremental variance in data obtained via the clinical interview and medical chart, once other self-report measures were accounted for. Overall, many of the MMPI-3 scale scores used in spine surgery evaluations appear to be reliable and valid. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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