- Study protocol
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Problem Management Plus (PM+) in the treatment of common mental disorders in women affected by gender-based violence and urban adversity in Kenya; study protocol for a randomized controlled trial
International Journal of Mental Health Systems volume 10, Article number: 44 (2016)
- The Correction to this article has been published in International Journal of Mental Health Systems 2018 12:55
Women affected by adversity, including gender-based violence, are at increased risk for developing common mental disorders such as depression, anxiety and posttraumatic stress disorder (PTSD). The World Health Organization (WHO) has developed Problem Management Plus (PM+), a 5-session, individual psychological intervention program, that can be delivered by non-specialist counsellors that addresses common mental disorders in people affected by adversity. The objectives of this study are to evaluate effectiveness of PM+ among women who have been affected by adversity, including gender-based violence, and to perform a process evaluation.
Informed by community consultations, the PM+ manual has been translated and adapted to the local context. A randomized controlled trial will be carried out in the catchment areas of three local health care facilities in Dagoretti Sub County, Nairobi. After informed consent, females with high psychological distress (General Health Questionnaire-12 (score >2) and functional impairment (WHO Disability Assessment Schedule 2.0 score >16) will be randomised to PM+ (n = 247) or enhanced treatment as usual (n = 247). Post-treatment and 3-months post-treatment follow-up assessments include psychological distress, functional disability, PTSD symptoms, perceived problems for which the person seeks help, health care use and health costs. For evaluating the process of implementing PM+ within local communities in Nairobi 20 key informant interviews will be carried out in participants, PM+ providers, decision makers, clinical staff.
If PM+ is proven effective, it will be rolled out to other low and middle income areas and other populations for further adaptation and testing.
Trial registration Australian New Zealand Clinical Trials Registry, ACTRN12616000032459. Registered prospectively on January 18, 2016
Gender-based violence (GBV) such as intimate partner violence or sexual violence by someone else is an increasing global topic of concern. Worldwide, the estimated lifetime prevalence of GBV is at least 30 % [1–3] Women living in urban poverty—including slums—in low and middle income countries (LMICs) are especially vulnerable for violence and common mental disorders, since poverty poses women at risk for experiencing gender-based violence. In Kenya, 47 % of women reported having experienced physical and/or sexual violence at some point in their lives.
Women exposed to GBV are at higher risk for developing common mental disorders such as depression, anxiety disorders, and posttraumatic stress disorder (PTSD) and make more use of health services than non-abused women [2, 4, 5]. Common mental disorders are among the largest contributors to disability and functional impairment (see Patel et al. ). Additional consequences of GBV involve reduced social and economic development prospects for women because of unwanted pregnancy, lack of resources, limited opportunities, concurrent physical health problems, low education, and fewer social supports [7, 8]. In most communities, women affected by GBV tend to receive no or minimal mental health support .
Effective interventions to treat common mental disorders are available (e.g., cognitive behavioural therapy; CBT [9, 10]). However, these interventions typically require expert mental health professionals providing treatments that are usually lengthy and costly to the health service. LMICs lack sufficient numbers of specialized mental health care professionals to deliver such interventions and are unlikely to afford costs associated with scaling up intensive treatment programs in an effective but safe manner. For practically and sustainably scaling-up evidence-based mental health care interventions in LMICs, interventions should be short and relatively easy to administer, so they can be carried out by non-specialist helpers in the community, such as community health workers (cf. ). In addition, interventions should not target one outcome (e.g. PTSD) but address a broader range of outcomes, including general functioning and common mental and psychosocial health problems.
World Health Organization (WHO) has developed a low-intensity 5-sessions program termed Problem Management Plus (PM+) which may be delivered by trained non-specialist helpers . PM+ aims to reduce symptoms of depression, anxiety, PTSD, stress in the wake of adversity and trauma and to improve functioning. It comprises evidence-based techniques: of (a) problem solving, (b) stress management, (c) behavioral activation, and (d) accessing social support.
The impetus for developing the PM+ manual came from request to the Department of Mental Health and Substance Abuse at the WHO in Geneva to develop interventions for survivors of GBV that may be delivered in such manner that they are feasible in Sub-Saharan Africa, where (a) health systems typically do not have the resources to make available proven psychological interventions on a routine basis (e.g. exposure therapy, cognitive processing therapy, Eye Movement Desensitization and Reprocessing), and (b) where social stigma against GBV can be so high that attending specific mental health care for GBV can put women at social risk (e.g., further violence, abandonment by the community). PM+ addresses these two requirements by involving relatively simple, non-intrusive techniques that do not necessarily focus on the trauma of GBV. It can thus be offered outside of the context of vertical GBV-services by briefly trained but well-supervised helpers to most women impaired by distress, irrespective of the causes of the distress. Additionally, this study aims to test the capacity of PM+ to reduce mental disorders in women affected by GBV by screening for psychological distress in women in adversity-affected community settings; because this way of case identification potentially overcomes the barrier of GBV-survivors to seek mental health assistance and reduces the risks of stigmatizing women who have suffered GBV through services that are only for GBV survivors.
Aim and design
This study aims to evaluate the effectiveness of the locally adapted version of PM+ in women affected by adversity and GBV in urban slum areas in Nairobi, Kenya in reducing symptoms of common mental disorders. We will conduct a randomized controlled trial (RCT) comparing PM+ to enhanced treatment as usual (ETAU) in 494 study participants. See Fig. 1 for an overview of the design. In addition, we will perform a process evaluation to examine barriers and facilitators when implementing the RCT and the interventions in the chosen settings.
The study will be carried out in three local health care facilities that are part of the primary healthcare system of the Dagoretti Sub County Nairobi in Kenya. Kenya is a LMIC; despite a growing middle class, almost half (45.9 %) of the population lives below the national poverty line. The study is overseen by staff of World Vision Kenya and their Riruta Area Development Program, which is a geographic area where World Vision implements long-term community development programs in collaboration with primary health care centres.
Participant inclusion criteria are: (a) adult (18 years or older) females; (b) score above 2 on a screening questionnaire for psychological distress (General Health Questionnaire-12; GHQ-12; and (c) score above 16 on a screening questionnaire for functional impairments (WHO Disability Assessment Schedule 2.0; WHODAS; ). These instruments are described below. Exclusion criteria are: (a) male gender; (b) acute medical conditions; (c) risk of suicide; or (d) severe mental disorders or cognitive impairment (e.g., severe intellectual disability, dementia, psychosis).
Informed consent entails a two-step procedure: (1) Informed consent for screening and (2) Informed consent for taking part in the PM+ trial. The latter is only required for participants meeting inclusion criteria. For each step respondents who decide to participate will be asked to complete a written consent form. Each person will be given at least 24 h to think whether she wants to take part in the PM+ trial. For participants who are illiterate, witnessed oral consent and a thumb print in lieu of a signature will be asked, in line with recommendations from WHO . The witness will not be a member of the research team.
Participants will be included through community screening at the homes of the participants by independent assessors. Assessors start sampling at a central point in the community and randomly select a direction in which to screen, selecting households using a population-based interval approach. In this approach, members from a larger population are selected according to a random starting point and a fixed, periodic interval (called the sampling interval), which is calculated by dividing the population size by the desired sample size. Thus, the sampling interval will vary depending on the population size of each of the three areas involved in the research.
After selecting the households, independent assessors will identify and attempt to meet with the head of each household. The assessors explain the purpose of the survey and ask if they may interview a random adult woman aged 18 years or older from the household. If a household does not have a woman of 18 years or older, or the woman declines to be screened for the research, the enumerator moves on to the next household based on the sampling intervals.
The independent assessors will refer individuals meeting any of the exclusion criteria to specialist support in the county according to their need. All interviews are conducted face-to-face in a private space (e.g. in people’s homes or in a quiet area near their homes). If participants are not selected because they score below the cut-offs for either the GHQ-12 or the WHODAS, they will be provided feedback on their test outcomes and reasons why they are not eligible for the study will be explained to them. Next, the pre-assessment is completed by administering the PTSD Checklist for DSM-5 (PCL-5), Life Events Checklist (LEC), selected questions of the WHO violence against women instrument (WHO-VAW), the psychological outcome profiles instrument (PSYCHLOPS) and items derived from the Service Receipt Inventory (SRI).
The post-intervention assessment (WHODAS, GHQ-12, PCL-5, PSYCHLOPS) is scheduled 7 weeks after the pre-intervention assessment (i.e., 1 week after the 5th PM+ session), and the follow-up assessment (WHODAS, GHQ-12, PCL-5, LEC, PSYCHLOPS, SRI) is scheduled at 13 weeks after the post-intervention assessment (i.e. 20 weeks after inclusion, in line with the timing of the follow-up assessment for the PM+ participants). The participants who receive PM+ will also be administered the PSYCHLOPS by the non-specialist helpers at the beginning of each PM+ session. Table 1 presents an overview of measures that are administered at each of the assessments.
All instruments will be delivered in interview format as many participants are expected to be illiterate. Female independent assessors, most holding a tertiary-level degree in psychology or a related discipline, and fluent in Kiswahili and English will carry out the screening and pre and post assessments. Assessors will have received a three-day training covering administering the instruments, common mental disorders, general interview techniques, and ethical research conduct. An additional one-day training in psychological first aid and how to support women experiencing emotional distress will also be provided for assessors. Ongoing monitoring of assessors’ competency will be conducted through regular supervision by the trial manager. The assessors will be blind to the allocation status of the participants.
A total number of 494 participants will to be included. Since we are not aware of intervention studies that have been carried out in this population, and we expect the population to be heterogeneous with respect to the types of common mental disorders, we aimed for a small to medium effect size of d = 0.04 in GHQ-12 symptom score in the PM+ group as compared to the control group at 3 months after the conclusion of the study. These estimates are in line with the observed effectiveness of an intervention led by lay health counsellors for depressive and anxiety disorders in a study in primary care in India . Power calculations suggest a minimum sample size of 133 participants per group (power = 0.95, alpha = 0.05, two-sided). Taking into account 30 % attrition at follow-up, at least 346 participants (173 per group) need to be included. Further, since we estimate that 70 % of women in this distressed sample would have a history of GBV, we intend to include at least 494 women in the study.
Randomization will occur following pre-assessment. This will be conducted by an independent research assistant located off-site (University of New South Wales) and not involved in any other aspects of the study. Randomization will be performed using computerized software on a 1:1 basis.
The Problem Management Plus (PM+) program
The WHO PM+ program involves a set of a brief psychological strategies that seek to ameliorate symptoms of common mental health problems (e.g. depression, anxiety, stress). The intervention protocol was written for WHO by a consultant of the University of New South Wales, Australia [12, 16].
The PM+ intervention protocol has been translated into Kiswahili and adapted to the local sociocultural context of the lives of women in poor neighborhoods of Nairobi. The translation and adaptation have been reviewed in two workshops: one with experts on the intervention and the other with community representatives including local leaders, local health care provides, community health workers (CHWs) and Kenyan translators .
PM+ integrates problem-solving and behavioral treatment techniques that demonstrate amenability to low-intensity delivery and are evidence-based [18–21]. PM+ is delivered over 5 weekly sessions of 90 min duration. Clients are systematically taught four strategies: (1) stress management; (2) problem solving; (3) behavioral activation and (4) skills to strengthen social support. The PM+ program is being made available in different formats. In the current RCT, the PM+ individual version will be tested.
PM+ providers will be female CHWs, who will be selected based on individual interviews. PM+ providers will meet the following criteria: (1) High school diploma (form 4 level of education or above); (2) Reasonable proficiency in both Kiswahili and English language; (3) 1-year training post-secondary school as CHWs or health related career; (4) 2-years and above experience in community work; and (5) Already working as a CHW within a given geographical area. PM+ providers will receive a total of 2 weeks of training. In addition, one professional Kenyan supervisor will be employed for each of the three health facility areas.
Protocol adherence will be ensured by the supervisors and weekly group supervisions of the CHWs . Supervisors will receive weekly supervision and on-the-job training in supervision skills by the project intervention consultant (KSD).
To evaluate treatment fidelity, 10 % of all PM+ sessions will be attended by the supervisor, using a checklist to ensure basic elements of the PM+ intervention have been followed as required.
At the beginning of every PM+ session the PSYCHLOPS will be administered. This instrument, in contrast to above named instruments will be administered by the CHW to assess and monitor progress on problems for which the person seeks help.
Enhanced treatment-as-usual (ETAU)
Treatment-as-usual in primary healthcare centers in Nairobi, Kenya to individuals with common mental disorders usually consists of no or placebo treatment. For this study, treatment as usual will be substantially enhanced. Participants in the ETAU group will be referred to their primary care clinicians (usually nurses) for follow-up. These primary care nurses will have received a 3-day training; 1 day on basic psychological first aid communication skills and building on this with training from the International Federation of Red Cross non-specific lay-counselling resource . This resource focuses on ethical considerations for lay counsellors, structuring a helping conversation and referral for high care.
We will seek to keep track of the types and amount of support participants receive through the SRI. If, during this treatment or during the study’s assessments participants in ETAU arm show severe psychiatric disorders or problems (e.g., psychosis or suicidality) that require immediate specialist treatment and follow-up, they will be referred to the subcounty hospital, which has been contracted to provide gratis care to the participants referred for these problems.
The WHODAS  is a generic assessment instrument assessing general functioning, health and disability. Simple to administer, it is applicable across all health states, including mental disorders, and across cultures. WHODAS covers six domains (cognition, mobility, self-care, getting along, life activities, and participation). It assesses difficulties people have due to their illness across these domains during the last 30 days. Difficulties are scored as none, mild, moderate, severe, or extreme. We will use the 12-item interviewer administered version. The WHODAS has been validated in Kenya.
The GHQ-12 [24, 25] assesses level of general psychological distress during screening. The GHQ-12 consists of 12 questions that are scored on a 4-point scale ranging from 0 to 3. The total GHQ-12 score is obtained by summing up the scores of the individual items and ranges between 0 and 36 with higher scores representing higher levels of distress. When used as a screening tool, the GHQ-12 is usually scored bi-modally (i.e.-0-0-1-1), and ranges between 0 and 12. In a previous study in Kenya, a cut-off of higher than 2 has been reported to indicate clinical levels of distress .
Data on socio-demographic information (sex, age, education, marital status and work status) will be collected through questions A1-A5 of the WHODAS.
Primary outcomes are the level of psychological distress as measured with the GHQ-12 at 3 months follow-up (i.e., 3 months after the 5th PM+ session) and general functioning as measured with the WHODAS.
Posttraumatic stress disorder (PTSD) symptoms will be measured using the PCL-5 , which is a 20-item checklist corresponding with the 20 DSM-5 PTSD symptoms. Items are rated on a 0–4 scale and add up to a total severity score of 80. The PCL-5 will be adapted to ask for symptoms in the last week (rather than month) to enhance sensitivity to change.
PSYCHLOPS  will be administered at all assessments and at the beginning of each PM+ session, and assesses progress on problems for which the person seeks help. It consists of four questions that encompass three domains: problems (2 questions), functioning (1 question) and wellbeing (1 question). Participants are asked to give free text responses to the problem and function domains. Responses are scored on an ordinal six-point scale producing a maximum score of 20 (5 points per question). The PSYCHLOPs version administered at posttreatment and follow-up also includes an overall valuation question (determining self-rated outcome ranging from “much better” to “much worse”). PSYCHLOPS has been validated in primary care populations across several countries.
Previous stressor exposure will be assessed using the LEC . This is a widely used list of 17 experienced or witnessed events, such as rape, serious injury, combat exposure, or the sudden death of a loved one. A Kiswahili version of this list is available . At post-test the question phrasing will be adapted to capture life events that have occurred since commencing in the trial.
Five key questions of the Swahili version of the WHO-VAW as developed for use in the WHO Multi-Country Study on Women’s Health and Domestic Violence  are administered.
Indicators of economic impact will be assessed using the WHODAS question on days out of role and by selected SRI  questions on health care service use.
The feasibility, and difficulties and successes in carrying out research and intervention activities will be explored through semi-structured interviews with 20 key informants, including 5 CHWs. The burden of completing the assessments and PM+ on the time and effort of participants, satisfaction with the intervention, and barriers and facilitators to adherence will be explored through semi-structured interviews with a sample of 5 participants (including participants that have dropped out). In addition, 5 decision-makers with responsibilities for developing or implementing health policy, including heads of the relevant clinics, and 5 PHC staff (clinical officers/nurses) will be interviewed to obtain their perceptions of the benefits and challenges of integrating PM+ into the CHWs routine service provision.
To determine comparability between the conditions at baseline, multiple planned comparisons will be conducted for continuous variables and Chi squared tests for categorical ones.
Hierarchical linear modeling (HLM) analysis will be carried out to assess differential change over time in GHQ, WHODAS, and PSYCHLOPS scores between groups. For each outcome, the effects of time of measurement, group, and the group-by-time interaction will be analyzed. HLM presumes intent-to-treat analyses as HLM allows the number of observations to vary between participants and effectively handles missing data. Time (linear and quadratic), treatment condition, and their interaction will be included in the models. Fixed effects parameters will be tested at 95 %CI. The Level 1 model will represent within-patient change over time, and the Level 2 model will predict variation in within-patient change over time and encompass between-patient variables. Outcome analyses will be reported primarily in women reporting GBV, and secondarily for women affected by all forms of adversity.
Descriptive analyses will be carried out in SPSS and HLM analyses in Stata version 11.2. Across all analyses, two-tailed tests will be reported with p < 0.05.
Adverse events reporting
All adverse reactions and serious adverse events (SAEs) reported spontaneously by the subject or observed by the investigators or other staff members will be recorded by the research team. A SAE is an undesirable experience occurring to a subject during the study, whether or not considered related to the research procedure. Although it is unlikely that SAEs would occur given the nature of the intervention, all adverse events and SAEs will be reported to the local independent advisory board. This board will consist of the supervisor, the study coordinator and an independent medical professional from the local health facility. The chair or a nominated person from the advisory board will review SAEs within 48 h and the advisory board will review all AEs twice a month and where necessary to determine any appropriate action in respect of ongoing trial conduct. On the informed consent form, patient information is included to inform participants that the field coordinator, or another clinician other than their therapist are available to them if they are upset by this study.
The project has been approved locally by the Research Ethics Committee of the Great Lakes University of Kisumu, Kenya and by the WHO Ethical Review Committee (Protocol ID: RPC656, April 25, 2014, Amendment February 16, 2015).
By evaluating the effectiveness of PM+ in women affected by gender-based violence in Nairobi, Kenya, we seek to address the need for access to brief, effective psychological interventions that can be administered by non-professional health workers in LMICs. A second RCT on the effectiveness of individually delivered PM+ in males and females in an humanitarian setting in Peshawar, Pakistan is underway . If proven effective, PM+ may not only be used in similar areas in Kenya and Pakistan, but rolled out to other affected areas in both LMIC settings and high-resource countries for further adaptation. It may be a useful intervention for humanitarian settings (e.g., conflict settings) where mental health care for GBV-survivors is often lacking. PM+ may be tested in different formats (e.g., internet-delivered, group or young adolescent version) across a variety of populations suffering from psychological distress. The PM+ manual and accompanying training materials, if proven effective, will be published by WHO and will be made available on WHO’s website, in order to enable future scaling-up.
World Health Organization
Problem Management Plus
randomized controlled trial
gender based violence
WHO Disability Assessment Schedule 2.0
General Health Questionnaire-12
Service Receipt Inventory
enhanced treatment as usual
posttraumatic stress disorder
low and middle income country
cognitive behavioural therapy
PTSD checklist for DSM-5
WHO violence against women instrument
life events checklist
psychological outcome profiles instrument
community health worker
hierarchical linear modeling
statistical package for the social sciences
serious adverse event
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All authors were involved in the design of the study; MS, RB, KD, AS and MvO were involved in drafting the study protocol for ethics review, and all authors were involved in drafting and commenting on the paper. All authors read and approved the final manuscript.
The authors alone are responsible for the views expressed in this article, which do not necessarily represent the views, decisions or policies of the institutions with which they are affiliated.
Availability of data and materials
Data and materials will be shared upon request to prof. Richard Bryant, University of New South Wales, Sydney, Australia.
The authors declare that they have no competing interests.
The study is funded by Grand Challenges Canada, World Vision Canada and World Vision Australia.
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Cite this article
Sijbrandij, M., Bryant, R.A., Schafer, A. et al. Problem Management Plus (PM+) in the treatment of common mental disorders in women affected by gender-based violence and urban adversity in Kenya; study protocol for a randomized controlled trial. Int J Ment Health Syst 10, 44 (2016). https://doi.org/10.1186/s13033-016-0075-5
- Low- and middle income countries
- Gender-based violence
- Intimate partner violence
- Cognitive behavioural therapy
- Non-specialist counsellors
- Common mental disorders
- Posttraumatic stress disorder