CMAM Caseload Calculations

CommunityBased Management of Acute Malnutrition (CMAM) relies on accurate caseload calculations to ensure that health facilities and community outreach teams have the resources, staff, and supplies needed to treat children with moderate (MAM) and severe acute malnutrition (SAM). This page outlines the core concepts, stepbystep formulas, and practical examples that programme managers can use when planning, monitoring, and adjusting caseloads.

Why Caseload Calculations Matter

• Resource allocation Medicines, readytouse therapeutic foods (RUTF), and equipment are ordered based on projected numbers of cases.
• Human resources Staffing levels for health workers, community health volunteers (CHVs), and supervisors are set according to the expected workload.
• Supply chain resilience Over or underestimation leads to stockouts or waste, both of which jeopardise treatment outcomes.
• Performance monitoring Comparing actual admissions to projected caseloads helps identify gaps in case finding or reporting.

Key Definitions

Coverage target The proportion of the total need that a programme aims to meet (often 80% for SAM).

Incidence rate New cases per 1,000 children per year in the catchment area.

Prevalence Total number of existing cases at a given point in time.

Recovery rate Percentage of children who complete treatment successfully.

Fundamental Formulas

1. Estimating the SAM caseload

Projected SAM admissions = (Population% of children 659months)IncidenceCoverage target

Where:

• Population = total number of people in the catchment area.
• % of children 659months = usually 1215% of the total population.
• Incidence = average number of new SAM cases per 1,000 children per year (national or regional estimate).
• Coverage target = proportion of those cases the programme intends to treat (e.g., 0.80 for 80%).

2. Estimating the MAM caseload

Projected MAM admissions = (Population% of children 659months)MAM incidenceCoverage target

The same elements apply, but the incidence figure reflects the MAM rate (often 23times the SAM incidence).

3. Adjusting for seasonality

Many regions experience higher malnutrition rates during the lean season. A seasonal adjustment factor (SAF) can be applied:

Seasonadjusted caseload = Projected caseloadSAF

Typical SAF values range from 1.2 to 1.5 for the peak 3month period.

4. Determining commodity requirements

For RUTF:

RUTF (kg) = Projected SAM admissionsAverage daily dose (g)Average treatment duration (days) 1,000

Average daily dose is usually 200g for children 623months and 300g for older children.

StepbyStep Calculation Example

Integrating Human Resource Planning

Typical workload estimates:

• One CMAM focal health worker can manage 25 active SAM cases.
• One CHV can conduct initial screening and followup visits for 30 children per month.

Using the example above (486 admissions, average treatment 90days):

Staff Role	Cases Managed per Staff	Number Required
Focal health worker	25	20
Community health volunteer	30 per month ( 20 concurrent)	25

Adjusting for Recovery and Relapse

Recovery rates in wellfunctioning CMAM programmes are typically 7585%. Relapse rates of 510% should be added to annual forecasts.

Adjusted caseload = Projected admissions Recovery rate

Using a 80% recovery assumption: 374 0.80 = 468 children need to be entered into the system to achieve 374 successful completions.

Monitoring & Updating the Projections

• Quarterly review: Compare actual admissions with projections; adjust incidence assumptions if trends differ.
• Stockout alerts: Use a buffer stock of 1015% above calculated RUTF needs.
• Data sources: Use health management information system (HMIS) data, nutrition surveillance, and demographic surveys for the most recent figures.

Common Pitfalls to Avoid

1. Using outdated incidence rates Incidence can shift quickly after foodprice spikes or floods.
2. Ignoring population growth Update population denominators annually.
3. Assuming uniform coverage Remote or conflictaffected areas often have lower access; apply separate coverage targets.
4. Forgetting seasonal peaks A flat-year calculation underestimates peak demand.

Key Takeaways

• Start with a clear denominator: children 659months in the catchment.
• Apply locallyvalidated incidence rates for SAM and MAM.
• Incorporate your programmes coverage target and seasonal adjustment.
• Translate admissions into concrete commodity and staffing needs.
• Review projections quarterly and adjust based on realtime data.