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2017 ; 12
(9
): e0183806
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gab.com Text
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English Wikipedia
Pathological grooming: Evidence for a single factor behind trichotillomania, skin
picking and nail biting
#MMPMID28902896
Maraz A
; Hende B
; Urbán R
; Demetrovics Z
PLoS One
2017[]; 12
(9
): e0183806
PMID28902896
show ga
Although trichotillomania (TTM), skin picking (SP), and nail biting (NB) have
been receiving growing scientific attention, the question as to whether these
disorders can be regarded as separate entities or they are different
manifestations of the same underlying tendency is unclear. Data were collected
online in a community survey, yielding a sample of 2705 participants (66% women,
mean age: 29.1, SD: 8.6). Hierarchical factor analysis was used to identify a
common latent factor and the multiple indicators and multiple causes (MIMIC)
modelling was applied to test the predictive effect of borderline personality
disorder symptoms, impulsivity, distress and self-esteem on pathological
grooming. Pearson correlation coefficients between TTM, SP and NB were between
0.13 and 0.29 (p < 0.01). The model yielded an excellent fit to the data (CFI =
0.992, TLI = 0.991, ?2 = 696.65, p < 0.001, df = 222, RMSEA = 0.030, Cfit of
RMSEA = 1.000), supporting the existence of a latent factor. The MIMIC model
indicated an adequate fit (CFI = 0.993, TLI = 0.992, ?2 = 655.8, p < 0.001, df =
307, RMSEA = 0.25, CI: 0.022-0.028, pclose = 1.000). TTM, SP and NB each were
loaded significantly on the latent factor, indicating the presence of a general
grooming factor. Impulsivity, psychiatric distress and contingent self-esteem had
significant predictive effects, whereas borderline personality disorder had a
nonsignificant predictive effect on the latent factor. We found evidence that the
category of pathological grooming is meaningful and encompasses three symptom
manifestations: trichotillomania, skin picking and nail biting. This latent
underlying factor is not better explained by indicators of psychopathology, which
supports the notion that the urge to self-groom, rather than general psychiatric
distress, impulsivity, self-esteem or borderline symptomatology, is what drives
individual grooming behaviours.
|*Grooming
[MESH]
|Adult
[MESH]
|Animals
[MESH]
|Disruptive, Impulse Control, and Conduct
Disorders/classification/diagnosis/epidemiology/etiology
[MESH]