Department of Rehabilitation Medicine, University of Washington Medical Center, 1959 NE Pacific Street, Seattle, WA, 98195, USA.
Department of Psychology, University of Cincinnati, 5145 Edwards One, Cincinnati, OH, 45220, USA.
Obes Surg. 2020 Jan;30(1):127-138. doi: 10.1007/s11695-019-04133-7.
The Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) is commonly used to assess psychological factors that may adversely impact weight loss. Research is limited on the specific MMPI-2-RF scales that may predict poor postoperative outcomes following bariatric surgery. The current study compared preoperative MMPI-2-RF profiles associated with postoperative weight change to novel component scores in a bariatric surgery sample.
One hundred twenty-seven patients completed a preoperative medical evaluation, a test of reading ability, and the MMPI-2-RF. Percent weight loss was obtained postoperatively at 6 and 12 months.
Principal components analysis (PCA) generated five novel subcomponents from within the internalizing, externalizing, and interpersonal substantive scales of the MMPI-2-RF. Among these components, higher externalizing and social conflict scores at baseline were predictive of less percent weight change postoperatively at 6 months. A similar trend was observed with higher insecurity scores predicting less weight loss at 6 months postoperatively. At 12-month follow-up, higher insecurity scores at baseline remained predictive of lower percentage weight loss, while social conflict trended toward significance in the same direction. Model comparisons of traditional MMPI-2-RF scales were found to be more sensitive than the novel subcomponents. Specifically, demoralization (RCd), antisocial behavior (RC4), hypomanic activation (RC9), family problems (FML), and shyness (SHY) significantly predicted weight change after surgery.
Results suggested that specific problems scales were not more effectively differentiated into more sensitive and specific component scores, but demonstrated supportive evidence that the traditional MMPI-2-RF scales indicating higher degrees of behavioral dysregulation, poor self-efficacy, and lower social support predict reduced postoperative weight loss.
明尼苏达多相人格测验-2 修订版（MMPI-2-RF）常用于评估可能对减肥产生不利影响的心理因素。针对可能预测肥胖症手术后不良结果的特定 MMPI-2-RF 量表的研究有限。本研究比较了与肥胖症手术后体重变化相关的术前 MMPI-2-RF 图谱与肥胖症手术样本中的新成分分数。
127 例患者完成了术前医学评估、阅读能力测试和 MMPI-2-RF。术后 6 个月和 12 个月获得体重减轻百分比。
主成分分析（PCA）从 MMPI-2-RF 的内化、外化和人际实质性量表中生成了五个新的子成分。在这些成分中，基线时较高的外化和社会冲突分数预示着术后 6 个月体重变化较少。术后 6 个月体重减轻较少的预测趋势与不安全感评分较高相似。在 12 个月的随访中，基线时较高的不安全感评分仍然预测术后体重减轻百分比较低，而社会冲突呈相同方向的显著趋势。与传统的 MMPI-2-RF 量表相比，新子成分的模型比较发现更敏感。具体而言，抑郁（RCd）、反社会行为（RC4）、轻躁狂激活（RC9）、家庭问题（FML）和害羞（SHY）显著预测手术后体重变化。
结果表明，特定问题量表并没有更有效地分化为更敏感和特定的成分分数，但支持这样的证据，即表明更高程度的行为失调、自我效能低下和较低的社会支持的传统 MMPI-2-RF 量表预测术后体重减轻减少。
