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Mid-upper-arm circumference based case-detection, admission, and discharging of under five children in a large-scale community-based management of acute malnutrition program in Nigeria
© The Author(s). 2018
Received: 8 May 2017
Accepted: 20 February 2018
Published: 9 April 2018
Severe acute malnutrition (SAM) threatens the lives of millions of children worldwide particularly in low and middle-income countries (LMICs). Community-based management of acute malnutrition (CMAM) is an approach to treating large numbers of cases of severe acute malnutrition (SAM) in a community setting. There is a debate about the use of mid-upper arm circumference (MUAC) for admitting and discharging SAM children. This article describes the experience of using MUAC for screening, case-finding, referral, admission, and discharge in a large-scale CMAM program delivered through existing primary health care facilities in Nigeria.
Over one hundred thousand (n = 102,245) individual CMAM beneficiary records were collected from two of the eleven states (i.e. Katsina and Jigawa) that provide CMAM programming in Nigeria. The data were double entered and checked using EpiData version 3.2 and analyzed using the R language for data-analysis graphics.
The median MUAC at admission was 109 mm. Among admissions, 37.4% (38,275) had a comorbidity recorded at admission and 7.4% (7537) were recorded as having developed comorbidity during the treatment. Analysis in the better performing state program in the most recent year for which data were available found that 87.1% (n = 13,273) of admitted cases recovered and were discharged as cured, 9.2% (n = 1396) defaulted and were lost to follow-up, 2.9% (n = 443) were discharged as non-recovered, 0.7% (n = 104) were transferred to inpatient services, and 0.2% (n = 27) were known (died, to be dead or to have passed) during the treatment episode. The program met SPHERE minimum standards for treatment outcomes for therapeutic feeding programs. Factors associated with negative outcomes (default, non-recovery, transfer, and death) were distance between home and the treatment center; lower MUAC, diarrhea and cough at admission; or developing diarrhea, vomiting, fever, or cough during the treatment episode.
This study confirms that MUAC can be used for both admitting and discharging criteria in CMAM programs with MUAC < 115 mm for admission and MUAC > = 115 mm or at discharge (a higher discharge threshold could be used). Long distances between home and treatment centers, lower MUAC at admission, or having diarrhea, vomiting, fever, or cough during the treatment episode were factors associated with negative outcome. Providing CMAM services closer to the community, using mobile and / or satellite clinics, counseling of mothers by health workers to encourage early treatment seeking behavior, and screening of patients at each patient visit for early detection and treatment of comorbidities are recommended.
Acute malnutrition threatens the lives of millions of children globally and the risk of dying is highest among severely malnourished children . Children aged under five years with severe acute malnutrition (SAM) in Africa have high mortality rates without effective treatment . Several Sub-Saharan Africa countries experience chronic food insecurity and recurrent drought and hunger that lead to inadequate dietary intake, in terms of both quality and quantity, to meet the nutritional needs of children . It was estimated in 2005 that the proportion and number of severely wasted children in developing countries was 3.5% (95% CI: 1.8%–5.1%) and 19.3 (95% CI: 10.0–28.6) million children respectively. In addition to this, an estimated 449,160 child deaths (4.4% of all deaths) in children aged under 5 years were contributed to by severe wasting .
Community management of acute malnutrition (CMAM) is a relatively recent approach to manage SAM cases which aims to maximize program coverage while maintaining quality of care . The aim of CMAM programming is to treat severe malnutrition and reduce mortality. Different anthropometric indicators have been used for identifying, referring, admitting, and discharging children in nutrition programs treating SAM. Currently, the World Health Organization (WHO) and United Nation Children Fund (UNICEF) recommends the use of MUAC less than 115 mm, the presence of bilateral pitting edema, or weight-for-height z-score (WHZ) below − 3 (only where the use of WHZ is feasible) as independent criteria for diagnosing and admitting SAM children aged between 6 and 59 months . According to the recent Nigeria National Nutrition and Health Survey in 2014, the national prevalence of SAM in children aged between 6 and 59 months using the mid upper arm circumference (MUAC) case definition of MUAC < 115 mm and / or bilateral was 0.9% (95% CI = 0.7, 1.0) .
In large nutrition programs covering wide geographical areas and providing treatment at primary level facilities, as is the case in Nigeria, the use of MUAC for SAM diagnosis provides a simple, acceptable, fast, sensitive, specific, and low-cost indicator that can be measured by community volunteers and screening teams in the field . In LMICs, MUAC has been shown to be the best indicator for screening and detection of malnutrition in a community . In 2013 the WHO revised its recommendations to use WHZ ≥ − 2 (for cases admitted using WHZ), mid-upper-arm circumference ≥ 125 mm (for cases admitted using MUAC), or the absence of bilateral pitting oedema for at least 2 weeks (for cases admitted with edema) for discharging children from SAM treatment. Screening, admission, and discharge using WHZ is cumbersome requiring two or three trained staff and expensive equipment that is not part of essential clinic supply packs with measurements and calculations that are prone to error [9, 10] and height measurement and W/H calculation are not part of integrated management of childhood illness (IMCI) training. This article describes the experience of using MUAC for screening, case-finding, referral, admission, and discharge in a large-scale CMAM program delivered through existing primary health care facilities and has additional value in that it describes a large national program delivered by the statutory health sector when most CMAM reports are from small scale emergency programs run by NGOs.
Study setting and context
Over one hundred thousand (n = 102,245) individual CMAM beneficiary records were collected from two of the 11 states that provide CMAM programming in Nigeria (i.e. Katsina and Jigawa states). These two states were selected because of the large number of admissions to CMAM sites in these states. Data for all children admitted to the CMAM program from 2010 (March 2010 for Jigawa and July 2010 for Katsina) to December 2013 were extracted from beneficiary record cards, copied onto data collection sheets, and entered into a purpose-designed database system. An analysis of the study dataset as being representative of CMAM programming in two states of Nigeria over the years 2010–2013 was performed.
The national guideline states that Cured as those who recovered/ meet the discharge criteria, defaulter means absent during three consecutive visits (declared defaulter at third absence), death as died during treatment in outpatient therapeutic program (OTP) program and non-recovered as those who did not meet the discharge cured criteria after four months in treatment. The health care workers are the one who confirmed the defaulter and death cases based on the national guideline/ protocol . In this study, we define the following parameters used as follows. Weight gain (kg) as the difference between last recorded weight – admission weight; weight velocity (g/kg/day) defined as 1000 × last recorded weight − admission weight / last recorded weight × number of visits × 7; proportional weight gain defined as last recorded weight − admission weight / admission weight; and MUAC gain (mm) defined as last recorded MUAC – admission MUAC.
Admission and discharging criteria
Admission and discharge criteria (i.e. for patients discharged as cured) used in the Nigerian outpatient therapeutic program
MUAC < 115 mm
MUAC > 115 mm and no edema, evidence of sustained weight gain, and clinically wella
Bilateral pitting edema
MUAC > 115 mm and no oedema for two consecutive visits (i.e. at least two weeks), and clinically well
WHZ < − 3
MUAC > 115 mm and WHZ > − 2 and no oedema for two consecutive visits, and clinically well
Data management and analysis
To minimize data processing errors during coding and at data entry level, an extensive checking of data on the beneficiary record cards and on the computer -based methods was performed. In addition to this, manual checking was performed on all records cards from CMAM sites in the two selected states. Data were extracted and double-entered and validated at central level using a purpose designed database created using EpiData v3.2 software  by a motivated and experienced team of twenty data-entry clerks. Data were entered daily and checked as it was entered using legal value, range, and between-field consistency checks. These checks were repeated on all data in batch mode before data analysis. At each stage, identified errors were fixed by reference to original beneficiary record cards. Clearly erroneous data that could not be fixed were censored (i.e. marked as “missing”). Records were organized by CMAM site and missing key data items including missing CMAM site codes were recorded. Exit categories were checked and correctly recorded when not clearly recorded on the beneficiary record card, interactive checks for range and legal values were used to detect and correct problems as data were entered. These errors may arise from an invalid value recorded on the beneficiary record card or as a mistake during data entry by a data-entry clerk and 10 % of records (randomly selected on an ongoing basis) were double checked to verify the correctness of data. Two data-entry clerks with unacceptable rates of error were replaced during data-entry process and all records were re-entered by other data-entry clerks.
Post-test effect sizes used to identify associations with substantive significance
Risk ratio (RR) ≠ 1
Risk difference (RD)
|RD| > 5%
|d| > 0.20
Wald type test for β coefficient = 0
Pearson’s |rc| > 0.10
|r c | > 0.10
This two-stage process was adopted in order to avoid the problem of false discovery that often occurs when analyzing very large samples (i.e. when even very small differences are statistically significant) using statistical significance tests alone .
Variables associated with negative treatment outcomes were entered a multivariate logistic regression model. A backwards stepwise elimination procedure was used to remove non-significant variables (i.e. p ≥ 0.05) from the model. At each step, the variable with the largest p-value ≥0.05 was removed from the model and the model re-estimated. This process continued until all non-significant variables had been eliminated.
Characteristics of the sample of admissions from the Nigeria outpatient therapeutic program (2010 to 2013)
Number of children
Age (year-centered age-group) at admission (months)a
[6,17] centred at 1 year
(17,29] centred at 2 years
(29,41] centred at 3 years
(41,53] centred at 4 years
(53,59] centred at 5 years
Age at admission (months)
Median age at admission
Time to travel (hours)a
Description of the cohort at admission (admission criteria, anthropometry, and comorbidity) in the sample of admissions from the Nigeria Outpatient Therapeutic Program (2010 to 2013)
MUAC with oedema
MUAC at admission (mm)
Weight-for-age z-score at admission
Comorbidity at admission
Comorbidity during the treatment episodea
Outcomes of treatment in the sample of admissions from the Nigeria Outpatient Therapeutic Program (2010 to 2013)
Outcome (type of exit)
Weight gain (kg)b
Weight velocity (g/kg/day)c
Proportional weight gaind
MUAC gain (mm)e
Length of stay (visits)f
Length of stay, weight gain, weight velocity, proportional weight gain, and mid-upper arm circumference gain by outcome in the sample of admissions from the Nigeria Outpatient Therapeutic Program (2010 to 2013)
Length of stay (weeks)a
Weight gain (kg)a
Weight velocity (g/kg/day)a
Proportional weight gaina
MUAC gain (mm)a
3.1 (1.3; 5.0)
10% (0.0; 0.2)
1.6 (0.0; 3.0)
5% (0.0; 0.1)
3.4 (2.0, 5.0)
20% (0.1; 0.3)
2.4 (0.9; 4.0)
10% (0.0; 0.2)
Multivariable analysis associated with negative outcomes in the sample of admissions from the Nigeria Outpatient Therapeutic Program (2010 to 2013)
Strength of associationa
MUAC at admissionc
Diarrhea at admission
Cough at admission
0.88 (0.83 0.93)
Diarrhea during the treatment episode
Vomiting during the treatment episode
Fever during the treatment episode
Cough during the treatment episode
This is a large-scale CMAM program operating in Nigeria. The findings from the most recent data in the better performing state program show that 87.1% of admitted cases were discharged as cured. The program is meeting SPHERE minimum standards with a cure rate above 75%, defaulter rate below 15%, and mortality rate below 5% . The SPHERE minimum standards are usually applied to well-resourced emergency programs operating with considerable United Nation Organization (UNO), Non-Governmental Organization (NGO), and donor support. For a national program to meet these standards is, therefore, something of an achievement.
Previously, CMAM programs used a two-stage approach for screening and admission procedure. This used MUAC (at a high threshold such as 135 mm to ensure adequate case-finding sensitivity) for screening and referral of SAM cases at a community level by community-based volunteers and used weight-for-height at health facilities level to decide admission. This led to large numbers of children referred to the CMAM program being refused treatment because they do not meet the weight-for-height admission criterion [8, 17]. Rejected children often did not attend the program even when their nutritional status declined. Rejection also acted to discourage attendance in new referrals. This had a powerful negative impact upon program coverage . To avoid this “problem of rejected referrals” [8, 17], MUAC is increasingly used to identify and admit children with acute malnutrition for treatment. Studies have shown that MUAC < 115 mm identifies more severely malnourished children with a high risk of mortality if untreated than WHZ  and that there is no benefit in using both WHZ less than − 3 and / or MUAC less than 115 mm for admission purpose.
Coverage assessments using the Semi-Quantitative Evaluation of Access and Coverage (SQUEAC)/Simplified Lot Quality Assurance Sampling Evaluation of Access and Coverage (SLEAC) methodologies [20, 21] of the Nigerian CMAM program have yielded coverage estimates of about 38% (2013) and 37% (2014). These results are below SPHERE minimum standards for coverage but are not exceptional. Rogers et al. (2015) examined the coverage of 44 emergency CMAM programs from 21 countries and found an average coverage of 38.3% with 38 of the 44 studied programs failing to meet SPHERE minimum standards . The Nigerian CMAM program is delivering similar, admittedly substandard, coverage to that being achieved in other settings.
The median age at admission in this study was 13 months which is similar to studies carried out in Burkina Faso  and Sudan . This is a reflection of the peak age of children at which many suffer from acute respiratory infection (ARI) and diarrheal episodes [24, 25].
The average weight velocity in this study was 3.4 g/kg/day. This is similar to that reported elsewhere [22, 26, 27]. In our study, it was also found that the length of stay for those recovered children was 7 weeks / 49 days which is lower than the study in Gedaref, Northern Sudan which showed 60 days , 54 days in Burkina Faso  and higher than 42 days reported from Myanmar . These differences might be attributed to the different discharge criteria used in the different settings, which can influence the length of stay. In Northern Sudan, MUAC ˃ 125 mm for 2 consecutive measurements with stable weight or continuing weight gain was used while 15% weight gain and a minimum length of stay of 4 weeks was used for discharge in Burkina Faso.
According to the guidelines for selective feeding programs for the management of malnutrition in emergencies by UN High Commissioner for Refugees (UNHCR) / the World Food Programme (WFP) in collaboration of the United Nations Standing Committee on Nutrition(UNSCN) and the WHO, the standard average length stay for recovered children in therapeutic programme should be below 60 days for children in inpatient and outpatient care combined . The protocols for monitoring weight gain and clinical condition should ensure that the child reaches discharge criteria in approximately 8 weeks . Therefore, our finding support that the evidence that MUAC admission and discharging is possible whilst maintaining reasonable lengths of stay in the program with adequate weight gain.
Reasons for negative outcomes and proposed possible suggestions
Possible reasons for negative outcome
Practical solution suggested
• Distance between home and treatment centres
• Providing CMAM services directly in a greater number of communities using community based health workers (CHWs) or health extension workers (HEWs) to deliver CMAM services in their own communities.
• Lower MUAC at admission
• Late treatment seeking (i.e. lower MUAC at admission) is usually associated with high opportunity costs . These can be reduced by reducing time-to-travel / distance.
• Allowing mothers / caretakers to screen their own children to identify malnutrition early, facilitating referral and admission into malnutrition treatment program is recommended so as to reduce cost and decrease the rate of hospitalization [31, 32].
• Having diarrhoea, vomiting, fever and cough during the treatment episode that reduced response to treatment.
• Counseling of mothers by clinic staff and community-based volunteers regarding the importance of early treatment seeking for conditions such as diarrhoea, vomiting, fever, and cough at any time and especially during the treatment episode.
• Counseling mothers on appropriate treatment (i.e. ORS) for conditions such as diarrhoea and vomiting.
• Delivery and adherence to the full CMAM protocol to all cases while under treatment in program sites
• Enhanced clinical screening of all beneficiaries at each visit to facilitate early detection of comorbidities. A two-stage screen employing a simple formal question-set administered by lower-level clinic staff followed by a clinical screen by a nurse or doctor is likely to prove the most cost-effective approach.
• Provision of effective (i.e. second or third line) antimicrobials to all children with infections needing treatment
The study has strength and limitations. The strength of the study is having large sample size nature of the data that captured in the study and as MUAC is particularly suitable for large scale studies and surveys, as it can be measured with limited resources for human population surveys, especially among rural populations of developing countries . However, some incomplete data has been reported due to secondary nature of the data taken from routine program in health facilities.
This study confirms that MUAC can be used for both admission and discharge criteria in CMAM programs. Long distance between home and treatment centers, lower MUAC, diarrhea and cough at admission, or having diarrhea, vomiting, fever or cough during the treatment episode were associated with negative outcomes. Providing CMAM services closer to the community using either mobile clinics or satellite clinics or increasing the number of health facilities delivering CMAM services should minimize distance to travel. Conducting community sensitization and mobilization activities, counseling of mothers by health workers about early treatment seeking behavior and screening of cases for early detection of comorbidities is recommended. Identifying and addressing reasons for negative outcome is essential to achieving the goals of CMAM at the primary health care facilities.
The authors acknowledge the UNICEF Nigeria office for the support of the program. The views or opinions herein expressed in this paper are solely the reflection of the authors and not to UNICEF global or to any of the UNICEF Country Offices and as well, where the work is undertaken. Since our study does not involve the participation of either patients or the general population, the analysis did not require ethical approval as it constitutes a secondary analysis of existing program data and thought.
The author(s) received no specific funding for this work.
Availability of data and materials
Data are available from the corresponding author upon request.
The views, findings and conclusions represented in this article are those of the authors and do not necessarily represent the official views of the institutions with which they are affiliated.
SS conceptualized the study, interpretation of the data, drafted the manuscript and critically reviewed the manuscript. AT and SB conceptualized the study, interpreted the data, drafted the manuscript and critically reviewed the manuscript. MM conceptualized the study, performed the data analysis, interpreted, the data and critically reviewed the manuscript. All authors read and approved the final manuscript.
Ethics approval and consent to participate
This study used data that is collected at health facility level for routine patient monitoring and CMAM program evaluations. The study data were collected in close collaboration with the Nigeria National Bureau of Statistics. The CMAM program in Nigeria is operated as a joint venture between UNICEF and Federal Ministry of Health (FMoH). Data were used without obtaining consent from individual study participants since it was a retrospective analysis of previously collected routine program data. Confidentiality of information was ensured by avoiding the use of personal identifiers (e.g. names and addresses) other than the use of episode-specific clinic identifiers. Data entry and data analysis staff had no access to name and address data. This study was ethically approved and waiver was obtained from Nigeria’s National Bureau of Statistics Review Committee, Ref. No. NBS/UNICEF/RSHSD/10/IV/72, dated February 12, 2014.
Consent for publication
The authors declare that they have no competing interests.
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