Skip to content

Evaluating the effectiveness of a school-based salt reduction intervention in Malawi

Tackling cardiovascular risk in the adolescent life-course through a school salt reduction intervention in rural (Karonga) and urban (Lilongwe) Malawi

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN13909759
Enrollment
1950
Registered
2019-11-20
Start date
2019-09-16
Completion date
Unknown
Last updated
2025-02-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

1. Dietary sodium intake 2. Hypertension and cardiovascular disease Circulatory System

Interventions

The intervention consists of a 10-week programme of classroom-based contextually-relevant lessons related to salt reduction delivered to all Standard 6 children in 13 primary schools in Lilongwe (Area
Ministry of Health
District Education (DEO) and District Health Offices (DHO)
and MEIRU. The content and pedagogy of the lessons will include lectures on the harmful effects of excess salt, salt reduction targets, and methods of reducing salt consumption
interactive classes to discuss the practical challenges of salt reduction
linked homework (e.g. food diaries)
competitions, interactive dramas, and family quizzes
and provision of complementary printed materials including workbooks and posters. The intervention will initially be drafted based on the materials developed for a previous trial and reviewed during

Sponsors

London School of Hygiene & Tropical Medicine (LSHTM)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Child currently enrolled in standard 6 and aged 11-14 years OR an adult (16 years and above) in the household of a sampled and eligible child 2. Resident in study area (as defined as Area 25 and surrounding administrative areas in urban site; or Karonga DSS in rural site) 3. Both the sampled child and at least one adult member of the household willing to participate

Exclusion criteria

Exclusion criteria: 1. Not intending to stay in the same household for the following 18 months 2. Currently unwell 3. Mental incapacity such that they are unable to follow the instructions to collect a urine sample 4. More than one sampled child residing within the same household

Design outcomes

Primary

MeasureTime frame
Urinary sodium content as assessed by 24-hour urine using the crown ether membrane electrode method at baseline, 12-weeks and 52-weeks

Secondary

MeasureTime frame
1. Blood pressure at baseline, 12-weeks and 52-weeks 2. Individual dietary salt consumption as reported by 24-hour dietary recall questionnaire at baseline, 12-weeks and 52-weeks 3. Household per-capita salt consumption as assessed by 7-day household measurements at baseline, 12-weeks and 52-weeks

Countries

Malawi

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026