Factor Structure and Measurement Invariance of the Attitudes Toward Persons with Obesity (ATOP) Scale in a Preoperative and Postoperative Bariatric Surgery Sample.

Only two factors for the ATOP were empirically supported in the current sample (self-esteem and personality/social difficulties), which is slightly different from the three factors that were originally proposed when the measure was developed. This factor structure is supported both prior to bariatric surgery and 1 year after bariatric surgery.