Early Psychological Intervention After Rape

NCT ID: NCT05489133

Last Updated: 2025-08-28

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 200 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-06-14
• Study Completion Date: 2027-03-31

Brief Summary

Rape is a common cause of post-traumatic stress disorder (PTSD) among women, as around 30-50% will develop PTSD in the aftermath of rape. A modified protocol based on Prolonged Exposure Therapy (mPE), has been developed, consisting of three to five once or twice weekly 60 minutes sessions, and studies indicate that if implemented early after rape, mPE may prevent the development of PTSD. The aim of the study is to conduct a multi-site (4 Sexual assault care centers in Norway) randomized control trial (RCT) in which patients are recruited early after rape, and randomized to intervention (mPE) or treatment as usual (TAU).

Detailed Description

Rape is a common cause of post-traumatic stress disorder (PTSD) among women, as around 30-50% will develop PTSD in the aftermath of rape, leading to severe mental and physical suffering. There is a lack of evidence-based knowledge how to prevent the development of PTSD after rape. Women may suffer from PTSD for years before receiving therapy.

Prolonged Exposure Therapy (PE) is well documented as a therapy. However, preventing the development of PTSD have the potential to spare women of the suffering, prevent both mental and somatic health problems, and also reduce health care costs. Currently a brief protocol based on PE, has been developed, modified prolonged exposure (mPE), consisting of three to five once or twice weekly 60 minutes sessions, and studies indicate that if implemented early after rape, mPE may prevent the development of PTSD.

Specialized services for victims, Sexual Assault Care (SAC) centers have been established in Norway, offering forensic documentation, medical treatment and psychosocial follow-up. The follow-up service varies widely and no evidence-based preventive measures have been implemented.

The investigators propose to conduct a multi-site (SAC centers in Trondheim, Oslo, and Sandefjord) randomized control trial (RCT) in which patients are recruited early after a rape, and randomized within 2 weeks to intervention (mPE) or treatment as usual (TAU).

The patients will be stratified by treatment center and randomized in permuted blocks of varying sizes according to a computer-generated randomization key prepared by the Clinical Research Unit at .

Around 800 patients will attend one of the four SACs per year. Based on experience from others the investigators anticipate that approximately 200 patients will be eligible and consenting to participation in this study and that around 50% of participants will dropout during the study period. A final sample size of 100 completed participants (50 in the intervention and 50 in TAU) will achieve 80% power to detect a standardized mean difference (SMD) of 0.44 for each of the primary outcomes in a design with 3 repeated measurements assuming an autoregressive, AR(1), covariance structure when the standard deviation is 1, the correlation between observations on the same subject is 0.5, and the alpha level is 0.05 (PASS Sample Size software - Tests for Two Means in Repeated Measures Design). Given the rather conservative estimate for inclusion, the investigators will need 1.5-2 years to recruit sufficient numbers.

Given the nested structure of the data - e.g., multiple measurement points nested within patients, patients nested within therapists, therapists nested within study sites - data will be analyzed by multilevel modeling. In addition, multilevel modeling is a robust method to deal with the missing data given the expected high percentage of drop-out from the study. The primary analysis will be an intention-to-treat analysis.

Predictors and moderators of the intervention, like stress response (measured by level of cortisol in hair and saliva) and sleep patterns (measured with actigraphy), will be explored.

The planned intervention is a brief and simple program, with large potential to be implemented as routines if proven effective, and thus inform clinical guidelines.

Conditions

Post Traumatic Stress Disorder; Rape Sexual Assault; Sexual Dysfunctions, Psychological; Pelvic Floor Myalgia; Pelvic Pain Syndrome; Depression, Anxiety; Sleep Disturbance; Activity, Motor; Cortisol Deficiency

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: DOUBLE

Study Groups

Modified prolonged exposure (add on)

The psychological intervention modified Prolonged Exposure Therapy (mPE) is applied, in addition to Treatment as usual (TAU) (that is, an Add-on). mPE is a trauma-focused evidence-based cognitive behavioral therapy (CBT) shown to be effective in treating PTSD. We will use imaginal exposure in the sessions with the patient describing the traumatic event in detail while being recorded for later listening and homework, and in vivo exposure for visiting specific places or people. Psychoeducation and controlled breathing exercises play a secondary role in PE. We have adapted the mPE to the current SAC settings in Norway where nurses or social workers, not psychologist, as a rule are performing the psychosocial follow-up for rape victims. In this project we plan for three to five once or twice weekly nurse-/social worker-led mPE interventions, given early after the assault.

Group Type: EXPERIMENTAL

Modified prolonged exposure

Intervention Type: BEHAVIORAL

Imaginary and in vivo expo, in addition to psychoeducation

Treatment as usual (TAU)

Standard care at the sexual assault center (SAC), that is mostly nurse-/social worker-led psychoeducation at varying intervals and extent, and medical follow-up at the SAC.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Modified prolonged exposure

Imaginary and in vivo expo, in addition to psychoeducation

Intervention Type: BEHAVIORAL

Other Intervention Names

Brief intervention; cognitive behavioral therapy

Eligibility Criteria

Inclusion Criteria

• Women ≥ 16 years of age
• attending after a trauma meeting the DSM V trauma definition criterion "sexual violation" (in this context, characterized by penetration in any body orifice, by penis, finger, foreign body, but also attempted penetration leading to a sufficient mental reaction, helplessness, without control, intense fear etc.)

Exclusion Criteria

• Age < 16 years
• male biological gender
• cognitive disability
• acute psychosis
• acute suicidal
• severe alcohol/drug abuse
• current treatment for PTSD
• non-Norwegian speaking
• total amnesia for the event

• Minimum Eligible Age: 16 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

Norwegian University of Science and Technology

OTHER

Sponsor Role: collaborator

The Research Council of Norway

OTHER

Sponsor Role: collaborator

Norwegian Women's Public Health Association (Norske Kvinners Sanitetsforening)

UNKNOWN

Sponsor Role: collaborator

National Centre for Emergency Primary Health Care, NORCE

UNKNOWN

Sponsor Role: collaborator

UiT The Arctic University of Norway

OTHER

Sponsor Role: collaborator

St. Olavs Hospital

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Cecilie T Hagemann

Role: PRINCIPAL_INVESTIGATOR

St. Olavs Hospital

Joar Ø Halvorsen

Role: STUDY_DIRECTOR

St. Olavs Hospital

Locations

Overgrepsmottaket Sør-Rogaland

Stavanger, In, Norway

Site Status: RECRUITING

Oslo Emergency Medical Agency (Oslo kommune, Legevakten, Overgrepsmottaket i Oslo)

Oslo, , Norway

Site Status: RECRUITING

Sandefjord Emergency Medical Agency (Legevakten, Overgrepsmottaket i Vestfold)

Sandefjord, , Norway

Site Status: RECRUITING

Department of Obstetrics and Gynecology, St. Olavs hospital (Overgrepsmottaket)

Trondheim, , Norway

Site Status: RECRUITING

Countries

Norway

Central Contacts

Cecilie T Hagemann, PhD

Role: CONTACT

cecilie.hagemann@ntnu.no

95829490 ext. +47

Joar Ø Halvorsen, PhD

Role: CONTACT

joar.halvorsen@ntnu.no

92256656 ext. +47

Facility Contacts

Inga Vadapole, Masters

Role: primary

inga.vadapole@stavanger.kommune.no

91696911 ext. 47

Hanne Sandanger

Role: backup

hanne.sandanger@stavanger.kommune.no

40103553 ext. 47

Tone Jeksrud, Master

Role: primary

tone.jeksrud@hel.oslo.kommune.no

+4745295360

Anne B Lunde

Role: backup

anne.berit.lunde@hel.oslo.kommune.no

Linda M Gustavsen

Role: primary

linda.molgaard.gustavsen@sandefjord.kommune.no

+4797596797

Ruth C Grude

Role: backup

Ruth.Cecilie.Grude@sandefjord.kommune.no

Cecilie Hagemann, PhD

Role: primary

cecilie.hagemann@ntnu.no

+4795829490

Coordinator

Role: backup

EIRstudien@stolav.no

+4748117289

References

Haugen T, Halvorsen JO, Friborg O, Mork PJ, Mikkelsen G, Schei B, Hagemann C. Early Intervention after Rape to prevent post-traumatic stress symptoms (the EIR-study): an internal pilot study of a randomized controlled trial. Pilot Feasibility Stud. 2024 Sep 2;10(1):118. doi: 10.1186/s40814-024-01541-0.

Reference Type: RESULT

PMID: 39223617 (View on PubMed)

Haugen T, Halvorsen JO, Friborg O, Simpson MR, Mork PJ, Mikkelsen G, Elklit A, Rothbaum BO, Schei B, Hagemann C. Modified prolonged exposure therapy as Early Intervention after Rape (The EIR-study): study protocol for a multicenter randomized add-on superiority trial. Trials. 2023 Feb 21;24(1):126. doi: 10.1186/s13063-023-07147-w.

Reference Type: RESULT

PMID: 36810120 (View on PubMed)

Haugen T, Halvorsen JO, Friborg O, Schei B, Hagemann CT, Kjelsvik M. Therapists perspectives on the Early Intervention after Rape study: a qualitative process evaluation of a randomized controlled trial. Eur J Psychotraumatol. 2025 Dec;16(1):2443279. doi: 10.1080/20008066.2024.2443279. Epub 2025 Jan 7.

Reference Type: DERIVED

PMID: 39773406 (View on PubMed)

Other Identifiers

348496

Identifier Type: -

Identifier Source: org_study_id