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Table 6 Comparison between the Bergen 4-day treatment and standard ERP in effectiveness studies

From: Successfully treating 90 patients with obsessive compulsive disorder in eight days: the Bergen 4-day treatment

  Bergen 4-day Effectiveness Statistic
N M (SD) N M (SD) t-test (p)
Y-BOCS
 Pre 90 26.2 (3.4) 381 24.4 (5.4) 3.02 (=.0026)
 Post 90 10.5 (4.6) 374 18.2 (7.0) 9.93 (<.0001)
 3 months 90 10.7 (6.3) 317 16.2 (8.1) 5.95 (<.0001)
Remission Fisher’s test
 Post 90 72.2% 110 35.5% p < .0001
 3 months 90 67.8% 110 45.5% p = .0017
  1. Note: Data for effectiveness studies were taken from uncontrolled studies of ERP having 3–6 month follow-up. N indicates the total number of participants across these studies. Remission was calculated as ≥35% reduction of pre-treatment Y-BOCS scores and ≤ 12 on post and follow-up Y-BOCS