A personality inventory, the Karolinska Scales of Personality (KSP), was administered to a group of 28 severely obese patients before treatment with jaw fixation. Several items significantly predicted incapacity to maintain the achieved weight loss 1 year after treatment: anxiety, monotony avoidance, suspiciousness and a low degree of socialization. These personality traits constitute a syndrome of ego weakness or impulsivity which warrants further study.
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Jönsson et al. (1986) studied this question.
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