The International journal of eating disorders · 1997
Anorexia nervosa and bulimia nervosa: sibling sex ratio and birth rank--a catchment area study.
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Britto D J, Meyers D H, Smith J J, Palmer R L
Аннотация
OBJECTIVES: These were to determine (1) whether there is a birth rank effect in eating disorders, and (2) whether all-female sibships are overrepresented in the families of those with eating disorders.
METHOD: The study sample consisted of 293 female patients referred from a defined catchment area, the County of Leicester, United Kingdom, to an eating disorders clinic. Diagnoses were made using DSM-III and DSM-III-R. To discern birth rank effect, this core sample was expanded to one of 673 by adding published data sets to our own.
RESULTS: No evidence for either effect was found.
DISCUSSION: Biases which may have obscured genuine effects are discussed. A comment is made on the implication for family theories of causation of these negative findings.
METHOD: The study sample consisted of 293 female patients referred from a defined catchment area, the County of Leicester, United Kingdom, to an eating disorders clinic. Diagnoses were made using DSM-III and DSM-III-R. To discern birth rank effect, this core sample was expanded to one of 673 by adding published data sets to our own.
RESULTS: No evidence for either effect was found.
DISCUSSION: Biases which may have obscured genuine effects are discussed. A comment is made on the implication for family theories of causation of these negative findings.