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. 2021 May;137:603–612. doi: 10.1016/j.jpsychires.2020.11.001

Table 2b.

Skin Picking Disorder subtypes based on combined item-level data from MIDAS and SPS-R.

Title Observations Parameters AIC BIC Entropy
1-classes; 279 54 13761 14048 NA
2-classes; 279 96 9943 10521 0.999
3-classes; 279 138 9478 10347 0.985
4-classes; 279 180 9310 10469 0.986
5-classes; 279 222 9249 10699 0.989
6-classes; 279 264 9261 11002 0.990

Abbreviations: MGH-HPS = Massachusetts General Hospital Hair Pulling Scale; MIST-A-R = Milwaukee Inventory for Subtypes of Trichotillomania-Adult-Revised; MIDAS = Milwaukee Inventory for the Dimensions of Adult Skin Picking; SPS-R=Skin Picking Scale-Revised.