Table 3

Descriptive Statistics for Paired Sample T-Test Analyses

Baseline6-Month Follow-Up
Mean Score (SD)RangeMean Score (SD)RangeP-ValueCohen’s d
Self -Report Measures
 AAQ-II (N = 72)18.22 (9.70)7.00–47.0015.49 (8.19)7.00–43.00<.001c.386 
 PHQ-9 (N = 74)5.55 (5.43)0.00–25.004.22 (4.43)0.00–18.00.004b.314 
 BSL-23 (N = 139)0.65 (0.72)0.00–4.000.54 (0.65)0.00–3.45.008b .208 
Ways of Coping
 Use of DBT skills (N = 70)1.73 (0.67)0.00–2.951.78 (0.70)0.00–2.84.236–.086 
 Use of dysfunctional coping (N = 70)1.23 (0.72)0.00–3.001.09 (0.68)0.00–2.73.020a.250 
 Blaming others (N = 70)0.76 (0.77)0.00–3.000.62 (0.65)0.00–2.67.029a.231 
DBT Knowledge Quizzes
 Mindfulness (N = 31)5.87 (1.75)1.00–8.006.23 (1.88)1.00–8.00.148 –.191 
 Distress tolerance (N = 31)6.23 (1.96)1.00–8.006.61 (1.26)3.00–8.00.089 –.248 
 Emotion regulation (N = 31)5.23 (1.93)0.00–8.005.97 (1.72)0.00–8.00.013a–.419 
 Interpersonal effectiveness (N = 31)4.61 (2.06)0.00–7.005.52 (2.10)0.00–8.00.005b–.488 
  • aP < .05.

  • bP <.01.

  • cP .001.

  • Abbreviations: AAQ-II = Acceptance and Action Questionnaire, BSL-23 = Borderline Symptoms List, PHQ-9 = Patient Health Questionnaire