Hair pulling disorder and skin picking disorder have relatively limited associations with negative emotionality: A meta-analytic comparison across obsessive-compulsive and related disorders

Snorrason, Ivar; Kuckertz, Jennie M.; Swisher, Valerie S.; Pendo, Kevin; Rissman, Ariel J.; Ricketts, Emily J.

doi:10.1016/j.janxdis.2023.102743

Cited by 4 publications

(1 citation statement)

References 57 publications

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“…This finding supports the discriminant validity of the MGH-HPS; however, it also indicates that in the study sample hair-pulling was not with emotional distress. This observation is inconsistent with previous studies showing a high cooccurrence of TTM, depression and anxiety (e.g., Grant, et al, 2017;Houghton et al, 2016;Keuthen et al, 2016;Woods et al, 2006); however, it is in line with a recent metaanalysis showing the relatively limited association between trichotillomania and negative affectivity (Snorrason et al, 2023). It is plausible that the lack of correlational relationship yielded in the current study may be at least partially a consequence of the use of a small, non-clinical community sample.…”

Section: Discussioncontrasting

confidence: 99%

Reliability, Validity and Factor Structure of the Polish Version of the Massachusetts General Hospital Hair Pulling Scale

Kłosowska,

Sznajder,

Antosz-Rekucka

et al. 2023

Cogn Ther Res

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Purpose The Massachusetts General Hospital Hairpulling Scale (MGH-HPS) is a 7-item self-report tool that measures hair-pulling behaviors. The study aimed to assess the psychometric properties of the Polish version of the MGH-HPS in a sample of adults. Methods The online screening survey was completed by 1024 participants (777 women, 241 men, 6 non-binary), 92 of which (68 women, 24 men) were included in the study because they confirmed engaging in hair-pulling behaviors at least occasionally; 23 of those (2.25% of the initial sample) met the DSM-5 criteria for hair-pulling disorder. The participants were asked to complete the online version of the MGH-HPS, the Depression Anxiety Stress Scales-21-Item Version, the Obsessive Compulsive Inventory-Revised, and a scale containing the DSM-5 hair-pulling disorder criteria. The factor structure, reliability, validity, and diagnostic accuracy of the Polish version of the MGH-HPS were examined. Results The confirmatory factor analysis demonstrated that both a one-factor and a two-factor model fit the data well; however, given the high correlation between the factors, the unidimensional model may be superior. High internal consistency and convergent and divergent validity were obtained for the total score of the MGH-HPS and the Severity and Resistance and Control factors (Cronbach’s alphas: 0.89, 0.85 and 0.84 respectively). The ROC analysis indicated adequate prognostic ability of the total score to discriminate subjects with clinical and non-clinical hair-pulling. The optimal cut-off value was 13 points (sensitivity = 100%, specificity = 62.22%). Conclusions The Polish version of the MGH-HPS is a valid, reliable tool which may be used to measure hair-pulling behaviors in adult samples.

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