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A review of purging disorder through meta-analysis
#MMPMID28691846
Smith KE
; Crowther JH
; Lavender JM
J Abnorm Psychol
2017[Jul]; 126
(5
): 565-592
PMID28691846
show ga
Although a growing body of research has examined Purging Disorder (PD), there
remains a lack of conclusive evidence regarding the diagnostic validity of PD.
This meta-analysis compared PD to DSM-5 eating disorders (i.e., Anorexia Nervosa
[AN], Bulimia Nervosa [BN], and Binge Eating Disorder [BED]) and controls. A
comprehensive literature search identified 38 eligible studies. Group differences
on indicators of course of illness and both general and eating psychopathology
were assessed using standardized effect sizes. Results supported the
conceptualization of PD as a clinically significant eating disorder, but findings
were less clear regarding its distinctiveness from other eating disorder
diagnoses. More specifically, PD significantly differed from BN and BED in
natural course of illness (g = .40-.54), and PD significantly differed from AN in
treatment outcome (g = .27), with PD characterized by a better prognosis.
Overall, PD was more similar to AN and BED on many dimensional measures of
general and eating-related psychopathology, though PD was less severe than BN in
most of these domains. PD, BN, and BED groups also evidenced similar frequencies
of subjective binge episodes (SBEs), yet PD evidenced less frequent SBEs than AN.
There is a clear need for future studies of PD to assess validators that have not
been reported comprehensively in the literature, such as mortality, medical
morbidity, and course of illness. Additionally, empirical classification studies
are needed to inform future classifications of PD, particularly with regard to
categorical differences between PD and other eating disorders. (PsycINFO Database
Record
|*Diagnostic and Statistical Manual of Mental Disorders
[MESH]
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