ArticleBioPsychoSocial medicine2025
Communicative and critical health literacy and eating behaviors in Japanese adults predominantly over 40: the modifying role of body image distortion.
Article in BioPsychoSocial medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Abstract
backgroundDisordered eating behaviors, emotional eating (EE), uncontrolled eating (UE), and cognitive restraint (CR) contribute to weight dysregulation and remain public health concerns in Japan. Body image distortion (BID), or the misperception of one's body size, has been linked to both being underweight and overweight. While health literacy (HL) and BID are individually associated with eating behaviors, the influence of higher-order HL domains-communicative and critical literacy-and their interactions with BID remain unclear. This study examined how HL and BID jointly influence multidimensional eating behaviors.
methodsIn this cross-sectional study of Japanese adults, HL was measured using the 14-item Health Literacy Scale. BID was defined as the discrepancy between the perceived (via the Figure Rating Scale) and actual body size (via BMI) and categorized as underestimation, no distortion, or overestimation. Eating behaviors (UE, EE, and CR) were assessed using the Japanese version of the 18-item Three-Factor Eating Questionnaire-R18V2. Multinomial logistic regression was used to examine the association between HL and BID, and general linear models were used to test whether BID moderated the effects of higher-order HL domains on eating behavior.
resultsAmong the participants, 13.0% were underweight, 60.2% had a normal weight, 18.7% were overweight, and 8.0% were obese. BID was categorized as overestimation (36.7%), non-distortion (53.6%), or underestimation (9.7%). HL scores were not significantly associated with overestimation or underestimation; however, a higher BMI was inversely related to overestimation. Higher functional HL was associated with lower EE, UE, and CR across all BID subgroups. However, associations for communicative HL varied by BID (interaction P = 0.002 for EE, 0.070 for CR); it was positively associated with EE and CR in the underestimated group, but inversely associated with EE in the overestimated group. Critical HL was positively associated with CR in the overestimation group (interaction, P = 0.015).
conclusionFostering functional HL may support healthier eating behaviors, regardless of BID. Communicative HL may be beneficial for individuals with overestimation-type BID, but potentially counterproductive for those with underestimation. Critical HL appears to encourage more restrictive eating, specifically among individuals with overestimated HL.
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