The effects of an intensive outpatient treatment for PTSD

Figures & data

Figure 1. Measurements.

Table 1. Comorbid diagnosis.

Comorbid diagnosis	Total (N = 146)
Anxiety disorders	18 (12.3%)
Mood disorders	70 (47.9%)
Eating disorders	12 (8.2%)
Cluster B personality disorders	16 (11.0%)
of which borderline personality disorder	13 (8.9%)
Cluster C personality disorders	15 (10.3%)
All personality disorders (including NOS)	65 (44.5%)
Attention deficit hyperactivity disorder	22 (15.1%)
Somatic symptom disorder	14 (9.6%)

Note. Other comorbid diagnoses (e.g. OCD, ADHD and dissociative identity disorder) were also present but were not reported due to low frequency (N < 10).

Table 2. Mean scores and standard deviation of all measurement instruments and moments.

	Screening M (SD)	Pretreatment M (SD)	Posttreatment M (SD)	One week follow-up M (SD)	One month follow-up M (SD)	Six months follow-up M (SD)
CAPS-5 M*	43.41 (9.73) (N = 143)	–	–	–	25.99 (17.13) (N = 127)	19.66 (16.76) (N = 70)
CAPS-5 W*	42.83 (10.10) (N = 138)	–	–	27.45 (15.77) (N = 134)	25.06 (17.39) (N = 124)	18.54 (16.85) (N = 65)
PCL-5	55.82 (9.23) (N = 89)	55.75 (11.53) (N = 143)	44.86 (16.82) (N = 140)	37.15 (18.93) (N = 138)	33.65 (20.39) (N = 137)	27.57 (18.98) (N = 56)
VAS	83.28 (11.65) (N = 86)	78.49 (15.52) (N = 139)	59.48 (27.16) (N = 140)	53.63 (29.34) (N = 137)	44.83 (32.11) (N = 136)	34.02 (29.69) (N = 56)

Note. * M = month version, W = week version.

Figure 2. Course of PTSD symptoms on the CAPS-5.

Note: Error bars represent the standard error of the mean.

Table 3. Reliable Change Index (RCI).

Instrument	No change (%)	Improved (%)	Worsened (%)
CAPS-5	27 (21.77%)	91 (73.39%)	6 (4.84%)
PCL-5	27 (20.00%)	104 (77.61%)	4 (2.96%)

Note. Reliable Change Index (RCI) calculated using the Cronbach’s Alpha of the Dutch translation of the CAPS-5 (scores at screening compared to one month follow up) (Boeschoten et al., 2018) and PCL-5 (scores at pretreatment compared to one month follow up) (Van Praag et al., 2020).

Figure 3. Course of self-reported PTSD symptoms on the PCL-5 and VAS.

Note: Error bars represent the standard error of the mean. The VAS scale ranges from 0–100. The PCL-5 ranges from 0–80.

Boeschoten, M. A., Van der Aa, N., Bakker, A., Ter Heide, F. J. J., Hoofwijk, M. C., Jongedijk, R. A., Van Minnen, A., Elzinga, B. M., & Olff, M. (2018). Development and Evaluation of the Dutch Clinician-Administered PTSD Scale for DSM-5 (CAPS-5). European Journal of Psychotraumatology, 9(1), 1546085. https://doi.org/10.1080/20008198.2018.1546085

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Van Praag, D. L. G., Fardzadeh, H. E., Covic, A., Maas, A. I. R., & von Steinbüchel, N. (2020). Preliminary validation of the Dutch version of the posttraumatic stress disorder checklist for DSM-5 (PCL-5) after traumatic brain injury in a civilian population. PLoS One, 15(4), e0231857. https://doi.org/10.1371/journal.pone.0231857

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