Evidence map›Paper›PMID 28946866›Full record

Trial reportBMC public health2017

The effect of a micronutrient powder home fortification program on anemia and cognitive outcomes among young children in rural China: a cluster randomized trial.

Renfu Luo, Ai Yue, Huan Zhou, Yaojiang Shi, Linxiu Zhang, Reynaldo Martorell, Alexis Medina, Scott Rozelle, Sean Sylvia

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in BMC public health, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 5 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Renfu LuoChina Center for Agricultural Policy, School of Advanced Agricultural Sciences, Peking University, Beijing, China.
Ai YueCenter for Experimental Economics in Education, Shaanxi Normal University, 620 Chang'an Road West, Xi'an, 710119, China. yueai@163.com.ORCID 0000-0003-4241-1628
Huan ZhouWest China School of Public Health, Sichuan University, Chengdu, China.
Yaojiang ShiCenter for Experimental Economics in Education, Shaanxi Normal University, 620 Chang'an Road West, Xi'an, 710119, China.
Linxiu ZhangCenter for Chinese Agricultural Policy, Chinese Academy of Sciences, Beijing, China.
Reynaldo MartorellRollins School of Public Health, Emory University, Atlanta, USA.
Alexis MedinaFreeman Spogli Institute for International Studies, Stanford University, Stanford, USA.
Scott RozelleFreeman Spogli Institute for International Studies, Stanford University, Stanford, USA.
Sean SylviaGillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAnemia early in life has been associated with delayed cognitive and motor development. The WHO recommends home fortification using multiple micronutrient powders (MNPs) containing iron as a strategy to address anemia in children under two. We evaluated the effects of a program freely distributing MNP sachets to caregivers of infants in rural China.

methodsWe conducted a cluster-randomized controlled trial in Shaanxi province, enrolling all children aged 6-11 months in target villages. Following a baseline survey, investigators randomly assigned each village/cluster to a control or treatment group. In the treatment group, caregivers were instructed to give MNPs daily. Follow-up was after 6, 12, and 18 months of intervention. Primary outcomes were hemoglobin concentrations and scores on the Bayley Scales of Infant Development.

resultsOne thousand, eight hundred and-two eligible children and their caregivers were enrolled. At baseline 48% (870) of children were anemic and 29% (529) were developmentally delayed. Six hundred and-ten children (117 villages) were assigned to the control group and 1192 children (234 villages) were assigned to the treatment group. Assignment to the treatment group was associated with an improvement in hemoglobin levels (marginal effect 1.77 g/L, 95% CI 0.017-3.520, p-value = 0.048) and cognitive development (marginal effect 2.23 points, 95% CI 0.061-4.399, p-value = 0.044) after 6 months but not thereafter. There were no significant effects on motor development. Zero effects after the first 6 months were not due to low compliance, low statistical power, or changes in feeding behavior. Hemoglobin concentrations improved in both the treatment and control groups over the course of the study; however, 22% (325) of children remained anemic at endline, and 48% (721) were cognitively delayed.

conclusionsProviding caregivers with MNP sachets modestly hastened improvement in hemoglobin levels that was occurring absent intervention; however, this improvement did not translate into improved developmental outcomes at endline.

trial registrationISRCTN44149146 ; prospectively registered on 15th April 2013.

Indexed as

Child DevelopmentFood, FortifiedRural PopulationAnemia, Iron-DeficiencyChinaCluster AnalysisCognitionFemaleFollow-Up StudiesHumansInfantIronMaleMicronutrientsPowdersProgram EvaluationIronMicronutrientsPowdersAnemiaCognitionEarly childhoodMicronutrient supplementation

Identifiers

PMID28946866
PMCPMC5613507

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.