Cognitive performance of morbidly obese patients seeking bariatric surgery.

Bariatric surgery is efficacious for the treatment of severe obesity; however, little empirical research exists describing the demographic, psychosocial, and cognitive characteristics of patients presenting for the surgery. One hundred and sixty-nine morbidly obese patients seeking bariatric surgery underwent a presurgical psychological assessment, including cognitive testing. Morbidly obese individuals seeking bariatric surgery were similar in education, income status, and IQ compared with normative data. IQ was average, did not correlate with body mass index, and reflected a normal distribution. As a group, bariatric surgery patients endorsed minimal levels of depression and low levels of psychopathology. Obese individuals did demonstrate specific cognitive deficits on tests of executive function (e.g., problem solving and planning) when compared with normative data. This data suggests that bariatric surgery patients differ very little from other surgical populations on most demographic and psychosocial variables. The data does provide evidence for specific cognitive deficits in the area of executive functions at baseline in morbidly obese adults seeking bariatric surgery.