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Soap and education: a simple recipe for cleaner hands?

NCT ID NCT06865495

Knowledge-focused Sponsor: London School of Hygiene and Tropical Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study in Lusaka, Zambia, tested whether giving households a handwashing bucket and supplies, along with hygiene education, increases handwashing with soap. 1,800 households with a child under 5 were split into four groups: hardware plus promotion, hardware only, promotion only, or no intervention. Researchers observed handwashing behavior to find the most effective approach.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Handwashing hardware (Kalingalinga bucket) and supplies for making liquid soap, plus behavioral promotion
What this could lead to
If successful, this could show the best way to improve handwashing habits in low-resource communities, reducing disease spread.
What could go wrong
This is a completed study, so results are already known. The intervention may not work as well in other settings or with different populations.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

1,800 people

The number who actually took part.

Started

Mar 2025

Finished

Nov 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Eligibility is assessed at the household level. Inclusion Criteria: * At least one adult (aged 18 or older) who can consent to the study on behalf of all members of the household. * At least one child under the age of 5. Exclusion Criteria: * Already own a similar handwashing facility (e.g., sink, handwashing station). * Not permanent residents of the selected community and/or plans to leave the community within the next 3-6 months.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Handwashing behaviour

Contacts and locations

Locations

  • Centre for Infectious Disease Research in Zambia (CIDRZ)

    Lusaka, Zambia