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. 2016 Sep 12;6:32564. doi: 10.1038/srep32564

Table 2. Sociodemographic and clinical characteristics of the study sample.

Variable OCD (n = 596) Controls (n = 599) P value
Age, years (range) 29.84 ± 10.52 (19–63) 23.44 ± 3.92 (19–48) <0.001
Male/Female, n 390/206 393/206 0.950
Education, years 13.56 ± 2.38 13.39 ± 1.95 0.169
Onset age of OCD, years 18.48 ± 8.97    
 Early onset (≤17years), n (%) 328 (55.0)    
 Late onset (>17years), n (%) 268 (45.0)    
 Illness duration, years 11.36 ± 8.30    
Basal Y-BOCS score
 Total 24.92 ± 5.94    
 Obsessions 12.67 ± 3.03    
 Compulsions 12.24 ± 3.43    
Basal MADRS score 18.59 ± 8.71    
Comorbid diagnosis, n (%)
 Affective disorders 77 (12.9)    
 MDD (n = 46)      
 Depressive disorder, NOS (n = 21)      
 Bipolar I disorder (n = 5)      
 Bipolar II disorder (n = 5)      
 Anxiety disorders 35 (5.9)    
 Panic disorder (n = 22)      
 Social phobia (n = 9)      
 PTSD (n = 3)      
 GAD (n = 1)      
 Eating disorders 2 (0.3)    
 Tic disorder or Tourette’s disorder 24 (4.0)    
 Others 8 (1.3)    
Symptom dimensions, present, n (%)
 Symmetry 442 (74.2)    
 Forbidden thoughts 506 (84.9)    
 Cleaning 437 (73.3)    
 Hoarding 201 (33.7)    
DS-R score
 Core disgust 29.55 ± 8.08 28.58 ± 7.18 0.108
 Animal reminder disgust 21.63 ± 6.34 18.11 ± 6.52 <0.001
 Contamination-based disgust 9.12 ± 4.03 7.07 ± 3.44 <0.001

OCD, obsessive-compulsive disorder; Y-BOCS, Yale-Brown obsessive-compulsive scale; MADRS, Montgomery-Åsberg depression rating scale; MDD, major depressive disorder; Depressive disorder, NOS, depressive disorder, not otherwise specified; PTSD, posttraumatic stress disorder; GAD, generalized anxiety disorder; DS-R, disgust scale-revised.