Evidence map›Paper›PMID 34351927›Full record

ArticlePloS one2021

Prospective cohort study of exposure to tobacco imagery in popular films and smoking uptake among children in southern India.

Muralidhar M Kulkarni, Asha Kamath, Veena G Kamath, Sarah Lewis, Ilze Bogdanovica, Manpreet Bains, Jo Cranwell, Andrew Fogarty, Monika Arora, Gaurang P Nazar and 4 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. 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
0.5field-weighted citation impact, top 37% of its field
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, 5 citations in OpenAlex.

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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

14 authors at 4 institutions in 2 countries.

Muralidhar M KulkarniCommunity Medicine, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, India.
Asha KamathDepartment of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Udupi, Karnataka, India.ORCID 0000-0003-0727-8067
Veena G KamathCommunity Medicine, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, India.
Sarah LewisUK Centre for Tobacco and Alcohol Studies, University of Nottingham, Nottingham, United Kingdom.
Ilze BogdanovicaUK Centre for Tobacco and Alcohol Studies, University of Nottingham, Nottingham, United Kingdom.
Manpreet BainsUK Centre for Tobacco and Alcohol Studies, University of Nottingham, Nottingham, United Kingdom.
Jo CranwellDepartment for Health, Tobacco Control Research Group, University of Bath, Bath, United Kingdom.
Andrew FogartyUK Centre for Tobacco and Alcohol Studies, University of Nottingham, Nottingham, United Kingdom.
Monika AroraHRIDAY, Delhi, India.
Gaurang P NazarHRIDAY, Delhi, India.
Kirthinath BallalCommunity Medicine, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, India.
Ashwath K NaikDepartment of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Udupi, Karnataka, India.
Rohith BhagawathCommunity Medicine, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, India.
John BrittonUK Centre for Tobacco and Alcohol Studies, University of Nottingham, Nottingham, United Kingdom.
Manipal Academy of Higher Education · INUniversity of Nottingham · GBPublic Health Foundation of India · INUniversity of Bath · GB

Funding

Medical Research Council MR/P008933/1
6 · The paper itself

Abstract

backgroundExposure to tobacco imagery in films causes young people to start smoking. Popular Indian films contain high levels of tobacco imagery, but those that do are required by law to display onscreen health warnings when smoking imagery occurs and to include other health promotion messaging before and during the film. We report a prospective cohort study of incident smoking in relation to exposure to film tobacco imagery and anti-tobacco messaging in a cohort of children in southern India.

methodsWe carried out a one-year longitudinal follow up questionnaire survey in 2018 of a cohort of 39,282 students in grades 6, 7 and 8 (aged between 10 and 15 years) in schools in the Udupi district of Karnataka State in India who participated in a 2017 cross-sectional study of exposure to smoking in films and ever smoking status.

resultsWe obtained usable linked data in 2018 from 33,725 of the 39,282 (86%) participants with data from 2017. Incident smoking was reported by 382 (1.1%) participants. After adjusting for age, sex and common confounders significantly associated with incident smoking there was no significant independent effect of exposure to film smoking, either as a binary (Odds Ratio 1.6, 95% Confidence Interval (CI) 0.5 to 4.9) or as a graded variable, on smoking uptake. An exploratory analysis indicated that the presence of on-screen health warnings that complied fully with Indian law was associated with a significantly lower odds of smoking uptake (Odds Ratio 0.8 (0.6 to 1.0, p = 0.031) relative to the same exposure sustained in absence of compliant warnings.

conclusionExposure to tobacco imagery in Indian films was not associated with a significantly increased risk of incident smoking in South Indian children. While it is possible that this finding is a false negative, it is also possible that the effect of film exposure has been attenuated by the presence of on-screen health warnings or other Indian tobacco-free film rules. Our findings therefore support the wider implementation of similar tobacco-free film measures in other countries.

Indexed as

Mass MediaMotion PicturesTobacco ProductsTobacco SmokingAdolescentChildFemaleHumansIndiaMale

Identifiers

PMID34351927
PMCPMC8341541
OpenAlexW3189890757

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.