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Table 2 Average scores (and standard deviation) for the different scales measuring psychopathological co-morbidity of normal internet users compared with problematic internet users

From: Problematic internet use and psychiatric co-morbidity in a population of Japanese adult psychiatric patients

  Normal internet users (N = 173) Problematic internet users (N = 58) p (Mann–Whitney U test)
Athens Insomnia Scale 6.3 (4.5) 8.8 (4.8) <0.001*
Beck Depression Inventory 18.3 (12.7) 27.4 (11.9) <0.001*
State-trait Anxiety Inventory (State) 49.3 (12.1) 54.0 (12.0) 0.013
State-trait Anxiety Inventory (Trait) 53.9 (11.0) 61.8 (8.5) <0.001*
Adult ADHD Self-report Scale part A 1.8 (1.5) 3.1 (1.6) <0.001*
Adult ADHD Self-report Scale part B 1.8 (2.3) 3.5 (2.5) <0.001*
Autism Spectrum Quotient 21.6 (7.1) 25.9 (7.1) <0.001*
Obsessive-compulsive Inventory 36.3 (31.7) 63.2 (34.1) <0.001*
Liebowitz Social Anxiety Scale 54.0 (33.9) 71.4 (32.2) <0.001*
Alcohol Use Disorders Identification Test 3.2 (4.4) 4.3 (5.5) 0.357
Barratt Impulsiveness Scale 63.5 (8.2) 67.4 (8.2) 0.004*
  1. P-values represent the significance of uneven distribution between normal and problematic internet users on each of the scale scores, according to the Mann–Whitney U test
  2. *Significant after Bonferroni correction