Traditional versus developmental measures of weight suppression: Exploring their relationships with bulimic psychopathology
Objective: Weight suppression (WS) is related to a wide variety of eating disorder characteristics. However, individuals with eating disorders usually reach their highest premorbid weight while still developing physically. Therefore, a more sensitive index of individual differences in highest premorbid weight may be one that compares highest premorbid z-BMI to current z-BMI (called developmental weight suppression (DWS) here). Method: We compared the relationships between traditional weight suppression (TWS) and DWS and a wide variety of measures related to bulimic psychopathology in 91 females (M age, 25.2; 60.5% White), with clinical or sub-clinical bulimia nervosa. Results: TWS and DWS were correlated (r = .40). TWS was significantly related to only one of 23 outcome variables whereas DWS showed significant or near-significant relationships to 14 outcomes. DWS showed consistent positive relations with behavioral outcomes (e.g., binge eating) but consistent negative relations with cognitive/affective outcomes (e.g., weight concerns). Conclusions: Findings indicated a much more consistent relationship between the novel DWS measure and bulimic characteristics than with the traditional weight suppression measure. DWS showed both positive and negative relations with bulimic symptoms, though these findings require replication to confirm their validity. Consistent evidence indicated that the two WS measures served as mutual suppressor variables.