Research on feasibility and efficacy of Group Cognitive Processing Therapy for posttraumatic stress disorder in Japan

Research on feasibility and efficacy of Group Cognitive Processing Therapy for posttraumatic stress disorder in Japan - Research on Group Cognitive Processing Therapy for PTSD in Japan

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000012919

Enrollment

Registered

2014-01-23

Start date

2014-01-25

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Posttraumatic Stress Disorder (PTSD)

Interventions

The Group Cognitive Processing Therapy

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1.Those diagnosed as full or Partial PTSD by the CAPS with its score greater than 40 2.More than 6 months duration of PTSD 3.Those who live in the catchment area of the participating centers 4.Those who can spend 2 hours a day to do the homework assignment 5.Native Japanese speaker

Exclusion criteria

Exclusion criteria: 1.Those who cannot continue the treatment due to concurrent psychiatric disorders (ex. schizophrenia, bipolar disorder alcohol /drug related disorder, A cluster personality disorder etc.)and severe self-destructive symptoms(self-injury or suicidal attempt) 2.Those who have a history of epilepsy and whose EEG has not been normalized 3.Those who have too severe cognitive dysfunctions to do CPT sessions 4.Physical disease that may interfere psychological treatment 5.Those who have already received cognitive behavioral treatment for traumatic symptoms, or currently receive it 6.Those who cannot go to the hospital regularly(the absence rate of treatment periods > 50%) 7.Those who are judged by the screening doctors due to other reasons, such as pregnant, difficulty in understanding the procedure of the study or treatment protocol due to illiteracy or intellectual problem, ongoing or scheduled court litigation for which PTSD works favorably (excluding arbitration or litigation for divorce), and etc. 8.Those who have long history of sexual abuse in their own family.

Design outcomes

Primary

Measure	Time frame
Clinical Administered Scale for PTSD (CAPS)	—

Secondary

Measure	Time frame
1. Mini-International Neuropsychiatric Interview (M.I.N.I) 2.Impact of Event Scale Revised (IES-R) 3. Beck Depression Inventory-II (BDI-II) 4. Trauma Related Guilt Inventory (TRGI) 5. Trauma Related Guilt Inventory (TRGI) 6. Short Form 8 (SF-8) 7. Dissociative Experiences Scale (DES) 8. Overall Anxiety Severity and Impairment Scale (OASIS) 9. Dropout rate 10. Emergence of adverse event	—

Countries

Japan

Contacts

Public ContactTomoko Masaki

Musashino University Graduate School of Human and Social Science

cptmusashino@gmail.com03-5530-7333

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026