Abstract
Food addiction (FA) is associated with greater severity on many eating-related correlates when comorbid with binge eating disorder (BED) but no study has established this relation across the whole spectrum of binge eating, i.e., from no BED to subthreshold BED to BED diagnosis. This study aims to examine the effect of the presence of FA on the severity of eating behaviors and psychological correlates in patients without BED, subthreshold BED or BED diagnosis. Participants (n = 223) were recruited at a university center specialized in obesity and eating disorder treatment and completed a semi-structured diagnostic interview and questionnaires measuring eating behaviors, emotional regulation, impulsivity, childhood interpersonal trauma, and personality traits. They were categorized by the presence of an eating disorder (no BED, subthreshold BED, or BED) and the presence of FA. Group comparisons showed that, in patients with BED, those with FA demonstrated higher disinhibition (t(79) = -2.19, p = 0.032) and more maladaptive emotional regulation strategies (t(43) = -2.37, p = 0.022) than participants without FA. In patients with subthreshold BED, those with FA demonstrated higher susceptibility to hunger (t(68) = -2.55, p = 0.013) and less cooperativeness (t(68) = 2.60, p = 0.012). In patients without BED, those with FA demonstrated higher disinhibition (t(70) = -3.15, p = 0.002), more maladaptive emotional regulation strategies (t(53) = -2.54, p = 0.014), more interpersonal trauma (t(69) = -2.41, p = 0.019), and less self-directedness (t(70) = 2.14, p = 0.036). We argue that the assessment of FA provides relevant information to complement eating disorder diagnoses. FA identifies a subgroup of patients showing higher severity on many eating-related correlates along the binge eating spectrum. It also allows targeting of patients without a formal eating disorder diagnosis who would still benefit from professional help.
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