Evidence map›Paper›PMID 32004828›Full record

ArticleEnvironmental research2020

Estimating and mapping cigarette butt littering in urban environments: A GIS approach.

Roberto Valiente, Francisco Escobar, Jamie Pearce, Usama Bilal, Manuel Franco, Xisca Sureda

Abstract read
In one paragraph

Article in Environmental research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing 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

25 citing papers in PubMed.

  1. Mapping the Distribution of Tobacco Litter During the Haridwar Kumbh Mela 2021: A Compliance Assessment of Tobacco-Free Kumbh Mela.Indian journal of community medicine : official publication of Indian Association of Preventive & Social Medicine · 2026
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  19. Clean environment index: A new approach for litter assessment.Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA · 2023
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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

6 authors.

Roberto ValientePublic Health and Epidemiology Research Group, School of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain; Department of Geology, Geography and Environmental Sciences, University of Alcalá, Alcalá de Henares, Madrid, Spain. Electronic address: roberto.valiente@uah.es.
Francisco EscobarDepartment of Geology, Geography and Environmental Sciences, University of Alcalá, Alcalá de Henares, Madrid, Spain. Electronic address: francisco.escobar@uah.es.
Jamie PearceCentre for Research on Environment, Society and Health, School of GeoSciences, University of Edinburgh, Edinburgh, Scotland, United Kingdom. Electronic address: jamie.pearce@ed.ac.uk.
Usama BilalPublic Health and Epidemiology Research Group, School of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain; Urban Health Collaborative, Drexel Dornsife School of Public Health, Philadelphia, PA, United States. Electronic address: ubilal@drexel.edu.
Manuel FrancoPublic Health and Epidemiology Research Group, School of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States; Department of Epidemiology & Biostatistics, Graduate School of Public Health & Health Policy, City University of New York, New York, NY, 10027, USA. Electronic address: mfranco@uah.es.
Xisca SuredaPublic Health and Epidemiology Research Group, School of Medicine, University of Alcalá, Alcalá de Henares, Madrid, Spain; Department of Epidemiology & Biostatistics, Graduate School of Public Health & Health Policy, City University of New York, New York, NY, 10027, USA; Tobacco Control Research Group, Institut d'Investigació Biomèdica de Bellvitge-IDIBELL, l'Hospitalet de Llobregat, Barcelona, Spain; Consortium for Biomedical Research in Respiratory Diseases, CIBER en Enfermedades Respiratorias, CIBERES, Madrid, Spain. Electronic address: francisca.sureda@uah.es.

Funding

The Health Consequences of Urban ScalingDP5OD026429 · OD · DREXEL UNIVERSITY · PI BILAL, USAMA · 2018 to 2022
$2.7M
NIH HHS DP5 OD026429
6 · The paper itself

Abstract

backgroundCigarette butts are some of the most common form of litter in the World, causing severe environmental damage. Analysing spatial distribution of cigarette butts in the urban environment may lead to useful insights for further interventions to reduce this form of litter. In this study, we present a GIS-based methodology to estimate the density of cigarette butts across a large urban area.

methodsWe collected information about discarded cigarette butts in outdoor public spaces by systematic social observation in a diverse sample of areas in Madrid, Spain. We used these data to estimate the density of cigarette butts in public spaces around the entire city by performing GIS analyses based on Kernel Density Estimations. Last, we validated these measures using on-field observations in a set of locations across the city.

resultsHospitality venues and public transportation stops were the places with the highest concentrations of cigarette butts, followed by the entrances to educational venues and playgrounds. Central districts showed the highest amount of cigarette butts in contrast to peripheral ones. We found that our measure had good validity, with a correlation coefficient of 0.784. DISCUSSION: This is the first study estimating and mapping cigarette butt litter in a large urban area. We identified a set of outdoor public places with high concentrations of cigarette butts and found geographical unevenness in the distribution of this pervasive form of litter across the study area. Our findings demonstrate the ubiquitous nature of cigarette butts in the urban environment and the need for interventions to reduce its impact on both people's health and the environment.

Indexed as

SmokingSolid WasteTobacco ProductsCitiesEnvironmental MonitoringGeographic Information SystemsSpainSolid WasteCigarette butt densityCigarette buttsGISKernel density estimation

Identifiers

PMID32004828
PMCPMC7167348

What OpenQuestion holds

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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.