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. Author manuscript; available in PMC: 2010 Feb 10.
Published in final edited form as: Psychiatry Res. 2008 Jun 2;160(1):83. doi: 10.1016/j.psychres.2007.07.010

Table 3.

Intraclass Correlations of YBOCS-SC Category-Level Factor Scores Between Affected Siblings (n = 145 independent sib pairs)

Factor rICC P
Symmetry/Ordering 0.098 0.120
Taboo Thoughts 0.218 0.004*
Hoarding 0.236 0.002*
Doubt/Checking 0.165 0.023*
Contamination/Cleaning 0.169 0.020*
*

P < 0.05.

Symmerty/Ordering: Obsessions of symmetry, and repeating, counting and ordering/arranging compulsions; Taboo Thoughts: Aggressive, sexual, and religious obsessions; Hoarding: Hoarding obsessions and compulsions; Doubt/Checking: Overresponsibility for harm obsessions and checking compulsions; Contamination/Cleaning: Contamination obsessions and cleaning compulsions. YBOCS-SC = Yale-Brown Obsessive Compulsive Scale Symptom Checklist.