Johns Hopkins Bloomberg School Of Public Health

This study tested whether training people on methadone to become peer educators could help their friends who inject drugs and have HIV get into treatment. The peer educators talked to their social network members about medication for drug dependence and accompanied them to the cl…

This study tested a program called Family Connections for HIV-positive youth aged 15-21 and their caregivers in Zambia. The goal was to help teens achieve an undetectable viral load and reduce self-stigma through family support. Over 1,300 participants took part in group sessions…

This study tested whether giving pregnant women a balanced energy and protein supplement (BEP) can improve birth weight and reduce complications like low birth weight and preterm birth. Over 3,300 women in Bangladesh were randomly assigned to receive either BEP or standard prenat…

This study tested a culturally tailored program called Together Overcoming Diabetes (TOD) for American Indian families in Ojibwe communities. Adult caregivers with type 2 diabetes and their youth (ages 10-16) worked with local health coaches to set health goals. The program inclu…

This study tested different combinations of three programs—New Hope (coping skills), Elders Resilience (cultural support), and Case Management—to see which best reduces suicidal thoughts and builds resilience in American Indian youth aged 10 to 29. The 304 participants were ident…

This study tested whether using topical antibiotics and antiseptic washes can lower the amount of Staph bacteria on the skin of Native American adults who are at high risk for Staph infections. Participants either received the cleaning supplies plus education or just education al…

This study tested two nurse-led programs to help women living with HIV in Durban stay in treatment and keep the virus under control. Over 1,300 women took part, and researchers compared a decentralized treatment program with individualized case management. The goal was to see whi…

This study tested a data-to-care approach to reconnect people living with HIV in Ukraine who had fallen out of care. Researchers used health records to identify 160 participants and help them re-engage in HIV care, start or restart antiretroviral therapy, and achieve viral suppre…

This study tested a mobile app that helps small corner stores in low-income Baltimore neighborhoods order and sell more healthy foods like fruits and vegetables. About 310 stores and customers took part. The goal was to see if the app could make healthier options more available a…

This study tested whether a special disinfectant wipe for therapy dogs could reduce the spread of dangerous germs like MRSA to children during hospital visits. 45 children aged 3-17 took part. The goal was to keep animal therapy programs safe without losing their health benefits.

This completed trial in South Africa tested four support strategies—case management, food vouchers, peer buddies, and community PrEP pick-up points—to help female sex workers and young women stay on PrEP, a daily pill that prevents HIV. 304 participants were randomly assigned to …

This completed trial in Somalia tested whether giving families cash transfers alone or with extra support (like nutrition counseling or extra cash) could prevent malnutrition in children and mothers. Over 3,300 families received monthly payments for 6 months. Researchers measured…

This study looked at whether home safety assessments and modifications could reduce injury risks for children under 7 in low-income households. Researchers visited 300 homes, identified hazards like unlocked poisons, missing smoke alarms, and unsecured furniture, then provided fi…

This study tested a special toolkit designed to help African American women in Mississippi get PrEP, a daily pill that prevents HIV. The toolkit also addressed intimate partner violence, which can make it harder for women to focus on HIV prevention. Researchers worked with two co…

This study tested two culturally tailored programs to encourage breast cancer screening among 323 White Mountain Apache women. One group received a culturally relevant education module (CARE), while the other also got access to an Apache women's health coach. The main goal was to…

This study tested a program that combines HIV prevention (PrEP) with overdose prevention for people who use drugs. Nearly 500 participants in Baltimore received drug-checking services and access to PrEP to reduce their risk of both HIV and overdose. The goal was to see if this ap…

This study in Nigeria looked at whether offering extra health services for teens—like counseling, vision checks, and deworming—alongside the usual government programs could get more 9-year-old girls vaccinated against HPV. Over 12,000 people took part, and researchers compared ar…

This study tested an online program called Help Wanted, designed for men who are sexually attracted to children but have never acted on it. The goal was to give them skills and resources to keep children safe and improve their own well-being. About 147 men participated, answering…

This completed study looked at whether using adult day services for a family member with dementia helps reduce stress in Black caregivers. 42 caregivers reported their stress levels and provided saliva samples to measure stress hormones. The goal was to understand both the emotio…

This study looked at how different marketing messages about tobacco-free nicotine pouches affect what people think about them. Over 5,000 participants in the US, including smokers and young non-users, answered survey questions after seeing ads. The goal was to understand how word…

This study tested a program that brings in family and friends to support people receiving methadone treatment for opioid use disorder in Tanzania. The goal was to see if this social support approach is acceptable and practical, and whether it helps people stick to their methadone…

This study looked at how people understand and react to different labels on ultra-processed foods, like those found on fast-food menus. Over 14,000 adults in the U.S. viewed a menu with one of sixteen label designs and answered questions about their reactions and purchase intenti…

This study tested whether adding environmental harm labels to fast-food menu items influences people to choose healthier meals. Over 7,000 U.S. adults completed an online survey where they ordered from burger and sandwich restaurant menus with different label designs. The goal wa…

This completed pilot study tested whether adding climate-impact labels to fast-food menus influences the healthfulness of people's meal choices. Over 6,600 adults in the U.S. completed a hypothetical online ordering task, viewing menus with different label designs. The goal was t…

This study tested a coaching program called the Bullying Classroom Check-Up (BCCU) for 3rd-5th grade teachers in urban schools. The program helps teachers better detect and respond to bullying, with the goal of reducing aggressive behavior and improving school climate. Researcher…

This study tested a web-based app called myPlanKenya that helps women in Nairobi who are at risk of intimate partner violence. Researchers gave the app to 440 women and tracked changes in their safety, resilience, and ability to make decisions. The goal was to see if the app help…

This study looked at nearly 10,000 patients to see if combining information from clinical trials and electronic health records can help predict which depression medication works best for each person. Researchers analyzed data from people prescribed duloxetine or vortioxetine. The…

This study looked at how people understand different food labels that show how sustainable or environmentally harmful a menu item is. Over 14,000 adults in the U.S. were shown a fast-food menu with one of seven label designs and asked about their reactions and buying intentions. …

This study looked at over 3,300 households in Ethiopia to see which combination of food and nutrition programs works best. Families received different types of support, like savings groups, nutrition classes, or farming help. Researchers measured changes in food security, diet qu…

This study tested a program called Asdzáán Be'eená (Female Pathways) for Navajo girls ages 10-14 and their female caregivers. The goal was to see if the program improves communication, monitoring, and teens' plans to delay sex and avoid substance use. About 408 pairs took part, a…