Effect of hygiene & menstrual hygiene interventions on learning and psychosocial wellbeing in Madagascar

Last registered on October 14, 2025

Pre-Trial

Trial Information

General Information

Title
Effect of hygiene & menstrual hygiene interventions on learning and psychosocial wellbeing in Madagascar
RCT ID
AEARCTR-0014423
Initial registration date
September 23, 2024

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
October 07, 2024, 6:43 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Last updated
October 14, 2025, 12:45 PM EDT

Last updated is the most recent time when changes to the trial's registration were published.

Locations

There is information in this trial unavailable to the public. Use the button below to request access.

Request Information

Primary Investigator

Affiliation
Paris School of Economics

Other Primary Investigator(s)

PI Affiliation
Paris School of Economics
PI Affiliation
Paris School of Economics
PI Affiliation
Paris School of Economics

Additional Trial Information

Status
In development
Start date
2024-10-01
End date
2027-12-01
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
A first study in schools in rural Madagascar evaluated the effect of a bundle of hygiene-focused interventions in schools and showed substantial improvements in girls’ learning outcomes (+0.2SD). Building on these results, this study will run a second RCT to disentangle the effects of physical infrastructure from all the other components of the intervention (sensitization and sanitary pads). This separation is crucial for cost-effectiveness analysis (since physical infrastructure is expected to account for about 60% of the per-head intervention cost), and for understanding the mechanisms through which expanding access to infrastructure can complement female empowerment interventions. The study will measure effects on learning, psychosocial wellbeing, and a variety of secondary outcomes.
External Link(s)

Registration Citation

Citation
Díaz, Oscar et al. 2025. "Effect of hygiene & menstrual hygiene interventions on learning and psychosocial wellbeing in Madagascar." AEA RCT Registry. October 14. https://doi.org/10.1257/rct.14423-1.2
Experimental Details

Interventions

Intervention(s)
This project builds on the work of our partner NGO, CARE, in rural Madagascar, which was evaluated in our previous RCT (Kilonga I project). The activities included in this evaluation were evaluated in the previous RCT as a package, and include the following:
• Infrastructure. Construction of latrines and handwashing basins in schools that lack this infrastructure.
• Young Girl Leaders. CARE will recruit Jeune Fille Leaders (JFLs, “Young Girl Leaders”): schoolgirls who are willing to speak out against harmful social norms and act as advocates for menstrual hygiene in their school. Using data from teacher and professional staff assessments, these girls will be selected based on their willingness to actively and openly speak about menstruation, despite the taboo nature of the topic, and on their broader leadership skills. YGLs are trained on a curriculum focusing on key hygiene behaviors, the reduction of menstrual stigma, and leadership skills, and are asked to promote hygiene and reduce stigma among their peers and classmates at school. The YGLs are thus intended to act as a prominent example of someone engaging in behaviors that undermine the norm of stigmatization from within the social network.
• Teacher sensitization: Training sessions for teachers on water, sanitation, and hygiene (WASH) practices, including menstrual hygiene. After the training, teachers are encouraged to dedicate five minutes each week to discussing these topics with their students.
• Distribution of free sanitary pads: Each girl receives a free voucher that can be exchanged for recyclable menstrual pads produced by local seamstresses.
• WASH committee: Each school forms a committee consisting of students, teachers, and parents to motivate and organize hygiene-related activities.
• WASH competition: A school competition organized by the NGO to promote cleanliness and motivate schools to maintain tidy premises.
Intervention Start Date
2024-11-01
Intervention End Date
2027-07-01

Primary Outcomes

Primary Outcomes (end points)
• Learning. Standardized test scores in mathematics and literacy (direct assessment of 17 girls per school), and official school grades (79 girls per school).
• Psychosocial wellbeing – objective measures of stress (e.g. heart rate, blood pressure).
• Menstrual stigma (self-reported)
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
• Hygiene and menstrual hygiene knowledge and behaviour (self-reported measures, distinguishing between menstrual health practices and other health & hygiene practices).
• Student and teacher motivation (self-reported measures)
• Network integration and bullying (self-reported)
• Self-reported psychosocial wellbeing
• Information diffusion measures (self-reported exposure to discussions on hygiene/menstruation)
• School attendance (official school attendance and self-reported measures)
• School educational outcomes (grades progression, repetition, and previous school history).
• Results on standardized cognitive tests (direct assesment)
• Measures regarding early sexual activity and pregnancy (self-reported)
• Health – health measures including self-reported infectious diseases, middle upper-arm circumference measures, urinary tract infections.
• Additional outcomes for YGLs: self-confidence/self-perception, openness to discussion
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The study will be an RCT in 140 secondary schools in rural areas of the Amoron’I Mania region in Madagascar. The schools will be randomly assigned to one of 4 treatment arms:
1. Control (35 schools)
2. Infrastructure only (35 schools) – only construction of latrines and handwashing basins
3. Sensitization interventions + free sanitary pads (35 schools) – only Young Girl Leaders, teacher sensitization, school-based hygiene competition, and free distribution of menstrual pads. 2-6 girls are nominated in each school to be Young Girl Leaders.
4. The full package (35 schools) – combine all interventions from (2) and (3).

Hypotheses being tested:
• Effect of infrastructure. Understanding the impacts of the infrastructure by comparing arms with and without infrastructure is crucial for evaluating the overall cost-effectiveness of the program, since it is expected to contribute to about 60% of the overall cost. Measuring the psychosocial wellbeing effects of physical infrastructure is also crucial. Our qualitative work has indicated that in this setting, with very high rates of poverty and little state presence, having salient interventions in schools (visits from officials or construction of visible infrastructure) could have important effects on motivation and other psychosocial factors driving education, even if they do not target these outcomes directly.
• Effect of sensitization + sanitary pad interventions. Conversely, since the rest of the bundle of interventions is substantially cheaper to implement, finding that it is sufficient to generate learning effects could imply that it is very cost effective, competitive with the most cost-effective interventions described by a Global Advisory panel on education interventions (GEEAP 2023).
• Complementarity between infrastructure and other interventions. There may be important complementarities between the two types of interventions: for example, girls may only be able to change their hygiene behaviour and begin handwashing if they have access to handwashing basins at school. The 4th arm thus enables us to test this complementarity.

Data collection:
• Baseline (pre-intervention, October 2024), midline (after 1 year of intervention), and endline (after 2 years of intervention)
• Girls’ survey (17 girls per school) using surveys at the household of the 2,380 teenage girls and their mothers; teacher and director survey (maximum 3 per school); school-level survey.
In midline and endline, we also add approximately 4-5 girls per school to the sample who were potential nominees to be Young Girl Leaders (both in treatment and control schools, regardless of whether they were eventually trained), in order to measure causal effects on YGLs themselves.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by a computer
Randomization Unit
Cluster randomized at the school level
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
140 schools
Sample size: planned number of observations
The main sample includes 17 girls per school in each school, giving a total sample of 2,380.
Sample size (or number of clusters) by treatment arms
35 schools in each of the treatment arms.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
The design yields an MDE of 0.15, 0.12 and 0.11SD for learning, stress (as measured by heartrate), and school grades, respectively for the infrastructure versus no-infrastructure comparisons (70 vs 70 schools). The design also gives an MDE of 0.18, 0.15 and 0.12 SD for comparing the infrastructure only with the interventions including all other components (35 versus 70 schools). These MDEs align with the impact sizes observed in our first RCT, ensuring adequate power to detect meaningful effects. Our main statistical analysis will use ANCOVA regressions to compare the treatment arms. The detailed baseline modules for the questionnaire are attached.
IRB

Institutional Review Boards (IRBs)

IRB Name
Paris School of Economics
IRB Approval Date
2024-09-17
IRB Approval Number
2024-046