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Table 1 Comparisons of key demographic and clinical characteristics in step-down DBT and outpatient DBT

From: Effectiveness of step-down versus outpatient dialectical behaviour therapy for patients with severe levels of borderline personality disorder: a pragmatic randomized controlled trial

  Step-down DBTa Outpatient DBTb Test Statistic df p
M SE M SE
Age first mental health problems 11.13 .79 11.88 .67 t = −.72 49 .47
Age first contact mental health care 14.28 1.15 15.44 1.20 t = −.59 53 .56
Number of BPD criteria 7.10 .20 7.56 .30 t = −1.25 53 .22
Severity of BPD 3 m before intake 37.17 1.27 34.75 1.29 t = 1.12 53 .27
Age at time of intake 26.15 6.18d 25.63 7.45d Z = −.71e n.a. .48
Suicide attempts lifetime 4.72 6.79d 25.84 52.90d Z = −.64e n.a. .52
Ambivalent SI lifetime (N = 54) 12.50c 28.76d 33.88 77.59d Z = .41e n.a. .68
NSSI lifetime (N = 44) 525.48c 876.74d 938.07c 1644.26d Z = −.23e n.a. .82
  1. n.a. not applicable; Comparisons performed with t-tests for normally distributed variables and with Wilcoxon two sample tests for variables that were not normally distributed. a N = 39; b N = 16; c Patients that persisted that they could not recall lifetime occurrence of self-injurious behaviours, because it was “too high to estimate” were removed from calculations; d Standard deviation (SD) was reported instead of standard error (SE); e Wilcoxon two sample tests