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Table 2 Levels of symptoms and functioning in patients with and without continued cannabis use at one year follow-up (MANOVA between-subject effects)

From: Continued cannabis use at one year follow up is associated with elevated mood and lower global functioning in bipolar I disorder

  No continued cannabis use N = 56 Continued cannabis use N = 6  
Measure Mean SD Mean SD Mean square F P d
GAF-F 66.02 15.31 49.00 16.11 1561.12 6.599 .013 1.4
PANSS-P 8.70 2.55 9.67 2.58 5.05 .774 .383 0.9
IDS 11.17 9.89 18.50 11.89 289.60 2.802 .100 0.1
YMRS 2.25 3.90 7.33 5.47 139.53 8.469 .005 −0.3
Wilks’ λ 3.299 p = .017         
  1. GAF-F = Global assessment of functioning; PANSS-P = Positive and Negative Syndrome Scale-Psychotic; IDS = Inventory of depression Scale; YMRS = Young Mania Rating Scale. Significant values in boldface.