Publications by authors named "Craig Cohen"

Background: Despite the recognised links between food insecurity and parenting, few studies have evaluated the perceived impacts of livelihood or food security interventions on parental practices, intra-household functioning, adolescent behaviour and psychosocial outcomes in HIV-affected households in sub-Saharan Africa.

Aims: The study aimed to understand the perceived effects of food security on parenting practices and how this was experienced by both adolescent girls (aged 13-19 years) and their caregivers in rural Kenya.

Method: We conducted semi-structured, individual interviews with 62 caregiver-adolescent dyads who were participants in the adolescent (NCT03741634), a sub-study of adolescent girls and caregivers with a household member participating in the agricultural and finance intervention trial (NCT01548599).

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  • A mental health study in western Kenya tested the feasibility of delivering treatments for major depression and PTSD through non-specialist staff in primary care settings, incorporating both in-person and mobile health (mHealth) options due to the COVID-19 pandemic.
  • The chosen intervention involved either psychotherapy (Interpersonal Psychotherapy) or medication (fluoxetine), with 2,162 public sector primary care patients participating.
  • A secondary analysis assessed participants' preferences for mHealth or in-person treatment, exploring their reasons for choosing one method over the other and comparing demographic and clinical characteristics between the two groups.
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  • Exposure to adverse environmental conditions, like extreme heat and high air pollution, is linked to higher stillbirth rates, especially when considering social vulnerability at the county level in the U.S.
  • The study used various nationwide datasets to analyze county-level stillbirth rates, environmental factors, and social vulnerability, employing statistical models to identify correlations.
  • Results indicated a positive relationship between social vulnerability and stillbirth rates, as well as with extreme heat and fine particulate matter levels, suggesting that communities facing social challenges may be more affected by environmental risks.
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  • Following a decline in perinatal HIV transmission rates in Kenya from 20% to 8% between 2010 and 2021, the FACES program aimed to further reduce these rates by supporting HIV care for pregnant and postpartum women at 61 facilities in Kisumu County.
  • The program implemented three specific interventions in 2019, including high-risk clinics, case management, and a mobile app, to enhance support for women and their infants, while monitoring infant HIV acquisition up to 24 months.
  • Data collected from over 12,000 women and nearly 12,000 mother-infant pairs showed a focus on understanding the impact of these interventions on HIV transmission rates, with a particular emphasis on comparing outcomes
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  • Safer conception services are essential for HIV sero-discordant couples wanting to conceive, yet there is limited research on their experiences and preferences with various methods.
  • A study involving 17 couples in Zimbabwe revealed that choices around safer conception were influenced by desires for intimacy and factors like method familiarity, ease of use, and effectiveness in preventing HIV while achieving pregnancy.
  • Participants generally had positive experiences and satisfaction, particularly with ART/VL and PrEP, highlighting the importance of finding suitable methods for safe conception.
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  • Decision-making on childbearing for HIV sero-different couples requires balancing personal desires with perceived risks of HIV transmission, highlighting complex relationship dynamics.
  • A study conducted interviews with 17 couples who participated in the SAFER study, exploring their experiences with safer conception methods and the importance of communication and gender roles in their decision-making.
  • Findings suggest that safer conception programs need to focus on addressing power imbalances in relationships, enhancing couple communication skills, and providing support from healthcare providers to help couples make informed, safe reproductive choices.
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Background: Scalable PTSD screening strategies must be brief, accurate and capable of administration by a non-specialized workforce.

Methods: We used PTSD as determined by the structured clinical interview as our gold standard and considered predictors sets of (a) Posttraumatic Stress Checklist-5 (PCL-5), (b) Primary Care PTSD Screen for the DSM-5 (PC-PTSD) and, (c) PCL-5 and PC-PTSD questions to identify the optimal items for PTSD screening for public sector settings in Kenya. A logistic regression model using LASSO was fit by minimizing the average squared error in the validation data.

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Background: Adolescents account for 15% of new HIV cases in Kenya. HIV pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP) are highly effective prevention tools, but uptake is low among adolescents, particularly in resource-limited settings. We assessed awareness and acceptability of PrEP and PEP among Kenyan adolescents.

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Vaginal colonization by fungi may elicit genital inflammation and enhance the risk of adverse reproductive health outcomes, such as HIV acquisition. Cross-sectional studies have linked fungi with an absence of bacterial vaginosis (BV), but it is unclear whether shifts in vaginal bacteria alter the abundance of vaginal fungi. Vaginal swabs collected following topical metronidazole treatment for BV during the phase 2b, placebo-controlled trial of LACTIN-V, a -based live biotherapeutic, were assayed with semi-quantitative PCR for the relative quantitation of fungi and key bacterial species and multiplex immunoassay for immune factors.

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Background: Bacterial vaginosis (BV) increases HIV acquisition risk, potentially by eliciting genital inflammation. After BV treatment, the vaginal administration of LACTIN-V, a live biotherapeutic containing the Lactobacillus crispatus strain CTV-05, reduced BV recurrence and vaginal inflammation; however, 3 months after product cessation, CTV-05 colonization was only sustained in 48% of participants.

Results: This nested sub-study in 32 participants receiving LACTIN-V finds that 72% (23/32) demonstrate clinically relevant colonization (CTV-05 absolute abundance > 10 CFU/mL) during at least one visit while 28% (9/32) of women demonstrate colonization resistance, even during product administration.

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Background: Greater social capital is associated with positive health outcomes and better HIV management. The ways by which social capital may influence household water insecurity (HHWI), a critical determinant of health among persons living with HIV, remain underexplored. Further, despite the importance of reliable water access and use for health and agricultural productivity, few studies have described the strategies smallholder farmers living with HIV use to manage water insecurity.

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Objective: HIV stigma undermines antiretroviral treatment (ART) adherence and viral suppression. Livelihood interventions may target drivers of negative attitudes towards people with HIV (PWH) by improving their health and strengthening their economic contributions. We examined the effects of a multisectoral agricultural livelihood intervention on HIV stigma among PWH in western Kenya.

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Objectives: Live biotherapeutic products (LBPs) containing vaginal Lactobacillus crispatus are promising adjuvant treatments to prevent recurrent bacterial vaginosis (BV) but may depend on the success of initial antibiotic treatment.

Methods: A post hoc analysis of data collected during the phase 2b LACTIN-V randomized control trial (L. crispatus CTV-05) explored the impact of clinical BV cure defined as Amsel criteria 0 of 3 (excluding pH, per 2019 Food and Drug Administration guidance) 2 days after completion of treatment with vaginal metronidazole gel on the effectiveness of an 11-week LACTIN-V dosing regimen to prevent BV recurrence by 12 and 24 weeks.

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Understanding risk perception and risk-taking among youth can inform targeted prevention efforts. Using a health beliefs model-informed framework, we analysed 8 semi-structured, gender-specific focus group discussions with 93 youth 15-24 years old (48% male, 52% female), drawn from the SEARCH trial in rural Kenya and Uganda in 2017-2018, coinciding with the widespread introduction of PrEP. Highly connected social networks and widespread uptake of antiretrovirals shaped youth HIV risk perception.

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Purpose: To achieve the WHO cervical cancer elimination targets, countries globally must achieve 70% cervical cancer screening (CCS) coverage. We evaluated CCS uptake and predictors of screening positive at two public HIV care programs in western Kenya.

Methods: From October 2007 to February 2019, data from the Family AIDS Care and Education Services (FACES) and Academic Model Providing Access to Healthcare (AMPATH) programs in western Kenya were analyzed.

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Background: The syndemic effects of poverty, food insecurity and living with HIV are recognized as global health priorities, including through the United Nations Sustainability Goals 1, 2 and 3. Today, women and girls account for 63% of all new HIV infections in eastern and southern Africa, including Kenya. Pregnant and postpartum women living with HIV in this setting face unique challenges including increased financial insecurity as women leave the work force to care for their newborn infants.

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Background: HIV pre-exposure prophylaxis (PrEP) is an effective prevention tool; however, use among adolescents is thought to be low. To determine the unmet need and opportunity to expand use, we assessed awareness, prior use, and willingness to take PrEP among Kenyan adolescents.

Methods: The Maneno Yetu study recruited a community-based sample of adolescents aged 15-19 years (N = 3061) in Kisumu for a survey using respondent-driven sampling.

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Background: Adolescent girls may experience poor psychological well-being, such as social isolation, shame, anxiety, hopelessness, and despair linked to food insecurity.

Objectives: This study aimed to investigate the experiences with and perceived effects of a household-level income-generating agricultural intervention on the psychological well-being of adolescent girls in human immunodeficiency virus (HIV)-affected households in southwestern Kenya.

Methods: We conducted 62 in-depth interviews with HIV-affected adolescent girls and caregiver dyads in Adolescent Shamba Maisha (NCT03741634), a sub-study of adolescent girls and caregivers with a household member participating in Shamba Maisha (NCT01548599), a multisectoral agricultural and finance intervention trial aimed to improve food security and HIV health indicators.

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  • - The study aimed to see how an agricultural program impacted gender role conflict and sexual power among people with HIV in western Kenya, specifically comparing those who received the intervention with a control group that received standard care.
  • - Participants received resources like a water pump and training, and the study measured views on masculinity in men and relationship power in women using validated scales over 24 months.
  • - Results showed that men in the intervention group experienced significantly less gender role conflict, while women had greater sexual relationship power, suggesting that agricultural interventions can help address gender inequalities and potentially reduce poverty.
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The World Health Organization recommends thermal ablation (TA) as an alternative to cryotherapy within "screen-and-treat" cervical cancer programs in low- and middle-income countries (LMICs), including among women living with HIV (WLWH). Data on TA efficacy among WLWH are limited, however. We conducted a clinical trial to evaluate efficacy of TA for treatment of biopsy-confirmed cervical intraepithelial neoplasia grades 2 and 3 (CIN2/3) among WLWH in Kenya.

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Adolescents comprise approximately 15% of new HIV infections in Kenya. Impoverished living conditions in informal settlements place residents at high risk for HIV infection. We assessed factors associated with HIV infection among adolescents residing in urban informal settlements in Kisumu.

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Introduction: Widowed women make up 18-40% of the 12 million women living with HIV in eastern and southern Africa. Widowhood has also been associated with greater HIV morbidity and mortality. We compared the effectiveness of a multisectoral climate adaptive agricultural livelihood intervention (called Shamba Maisha) on food insecurity, and HIV related health outcomes among widowed and married women living with HIV in western Kenya.

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Objectives: Determine whether patient-centered, streamlined HIV care achieves higher antiretroviral therapy (ART) uptake and viral suppression than the standard treatment model for people with HIV (PWH) reporting hazardous alcohol use.

Design: Community cluster-randomized trial.

Methods: The Sustainable East Africa Research in Community Health trial (NCT01864603) compared an intervention of annual population HIV testing, universal ART, and patient-centered care with a control of baseline population testing with ART by country standard in 32 Kenyan and Ugandan communities.

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Exclusive breastfeeding for the first 6 months and continued breastfeeding for 24 months or longer is recommended for all mothers world-wide, including women living with HIV (WLWH). Given evidence of suboptimal infant feeding and the need to understand context specific barriers, we explored experiences of perinatal WLWH in Kisumu, Kenya. We applied a longitudinal qualitative approach (4 in-depth interviews) with 30 women from pregnancy to 14-18 months postpartum.

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Non-disclosure of human immunodeficiency virus (HIV) status can hinder optimal health outcomes for people living with HIV (PLHIV). We sought to explore experiences with and correlates of disclosure among PLHIV participating in a study of population mobility. Survey data were collected from 1081 PLHIV from 2015-16 in 12 communities in Kenya and Uganda participating in a test-and-treat trial (SEARCH, NCT#01864603).

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