Evidence map›Paper›PMID 36604693›Full record

ArticleMalaria journal2023

Estimating population ITN access at council level in Tanzania.

Hannah Koenker, Matt Worges, Joshua Yukich, Peter Gitanya, Frank Chacky, Samwel Lazaro, Charles Dismas Mwalimu, Sijenunu Aaron, Raya Ibrahim, Faiza Abbas and 8 more

Abstract read
In one paragraph

Article in Malaria journal, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–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

5 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
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

18 authors.

Hannah KoenkerUSAID Tanzania Vector Control Activity, Tropical Health, Baltimore, MD, USA. hannah@trophealth.com.
Matt WorgesUSAID Tanzania Vector Control Activity, Tropical Health, New Orleans, LA, USA.
Joshua YukichUSAID Tanzania Vector Control Activity, Tropical Health, New Orleans, LA, USA.
Peter GitanyaNational Malaria Control Programme, Ministry of Health, Dodoma, Tanzania.
Frank ChackyNational Malaria Control Programme, Ministry of Health, Dodoma, Tanzania.
Samwel LazaroNational Malaria Control Programme, Ministry of Health, Dodoma, Tanzania.
Charles Dismas MwalimuNational Malaria Control Programme, Ministry of Health, Dodoma, Tanzania.
Sijenunu AaronNational Malaria Control Programme, Ministry of Health, Dodoma, Tanzania.
Raya IbrahimZanzibar Malaria Elimination Programme, Zanzibar, Tanzania.
Faiza AbbasZanzibar Malaria Elimination Programme, Zanzibar, Tanzania.
Mwinyi KhamisZanzibar Malaria Elimination Programme, Zanzibar, Tanzania.
Deodatus MwingiziUSAID Tanzania Vector Control Activity, Johns Hopkins University School of Public Health Center for Communication Programs, Dar Es Salaam, Tanzania.
David DadiUSAID Tanzania Vector Control Activity, Johns Hopkins University School of Public Health Center for Communication Programs, Dar Es Salaam, Tanzania.
Ato SelbyUSAID Tanzania Vector Control Activity, Johns Hopkins University School of Public Health Center for Communication Programs, Dar Es Salaam, Tanzania.
Naomi SerbantezU.S. President's Malaria Initiative, Dar Es Salaam, Tanzania.
Lulu MsangiU.S. President's Malaria Initiative, Dar Es Salaam, Tanzania.
Dana LollUSAID Tanzania Vector Control Activity, Johns Hopkins University School of Public Health Center for Communication Programs, Baltimore, MD, USA.
Benjamin KamalaUSAID Tanzania Vector Control Activity, Johns Hopkins University School of Public Health Center for Communication Programs, Dar Es Salaam, Tanzania.

Funding

United States Agency for International Development 72062120C00001
6 · The paper itself

Abstract

backgroundSince 2013, the National Malaria Control Programme in mainland Tanzania and the Zanzibar Malaria Elimination Programme have implemented mass insecticide-treated net (ITN) distribution campaigns, routine ITN distribution to pregnant women and infants, and continuous distribution through primary schools (mainland) and community leaders (Zanzibar) to further malaria control efforts. Mass campaigns are triggered when ITN access falls below 40%. In this context, there is a need to monitor ITN access annually to assess whether it is below threshold and inform quantification of ITNs for the following year. Annual estimates of access are needed at the council level to inform programmatic decision-making.

methodsAn age-structured stock and flow model was used to predict annual net crops from council-level distribution data in Tanzania from 2012 to 2020 parameterized with a Tanzania-specific net median lifespan of 2.15 years. Annual nets-per-capita (NPC) was calculated by dividing each annual net crop by mid-year council projected population. A previously fit nonparametric conditional quantile function for the proportion of the population with access to an ITN (ITN access) as a function of NPC was used to predict ITN access at the council level based on the predicted NPC value. These estimates were compared to regional-level ITN access from large household surveys.

resultsFor regions with the same ITN strategy for all councils, predicted council-level ITN access was consistent with regional-level survey data for 79% of councils. Regions where ITN strategy varied by council had regional estimates of ITN access that diverged from the council-specific estimates. Predicted ITN access reached 60% only when "nets issued as a percentage of the council population" (NPP) exceeded 15%, and approached 80% ITN access when NPP was at or above 20%.

conclusionModelling ITN access with country-specific net decay rates, council-level population, and ITN distribution data is a promising approach to monitor ITN coverage sub-regionally and between household surveys in Tanzania and beyond.

Indexed as

InsecticidesInsecticide-Treated BednetsMalariaChild, PreschoolFemaleHumansMosquito ControlPregnancyTanzaniaInsecticidesBed netCommunity-basedDistributionInsecticide-treated netITNMalaria controlQuantificationSchoolSub-regionalTanzaniaVector controlZanzibar

Identifiers

PMID36604693
PMCPMC9815063

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.