Evidence map›Paper›PMID 32003493›Full record

ArticleAddiction (Abingdon, England)2020

The effect of wine glass size on volume of wine sold: a mega-analysis of studies in bars and restaurants.

Mark Pilling, Natasha Clarke, Rachel Pechey, Gareth J Hollands, Theresa M Marteau

Open access · hybridAbstract read
In one paragraph

Article in Addiction (Abingdon, England), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
20.7field-weighted citation impact, top 1% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 71 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

5 authors at 1 institution in 1 country.

Mark PillingBehaviour and Health Research Unit, University of Cambridge, Cambridge, UK.
Natasha ClarkeBehaviour and Health Research Unit, University of Cambridge, Cambridge, UK.ORCID 0000-0003-2375-4510
Rachel PecheyBehaviour and Health Research Unit, University of Cambridge, Cambridge, UK.
Gareth J HollandsBehaviour and Health Research Unit, University of Cambridge, Cambridge, UK.
Theresa M MarteauBehaviour and Health Research Unit, University of Cambridge, Cambridge, UK.ORCID 0000-0003-3025-1129
University of Cambridge · GB

Funding

Wellcome Research Fellowship 106679/Z/14/ZWellcome Trust 206853/Z/17/Z
6 · The paper itself

Abstract

aimTo estimate the effects of wine glass size on volume of wine sold in bars and restaurants.

designA mega-analysis combining raw (as opposed to aggregate-level) data from eight studies conducted in five establishments. A multiple treatment reversal design was used for each data set, with wine glass size changed fortnightly while serving sizes were unaffected, in studies lasting between 14 and 26 weeks. SETTING AND

participantsFive bars and restaurants in England participated in studies between 2015 and 2018, using wine glasses of five sizes: 250, 300, 370, 450 and 510 ml, with the largest size only used in bars. MEASUREMENTS: Daily volume of wine sold by the glass, bottle or carafe for non-sparkling wine were recorded at bars (594 days) and restaurants (427 days), averaging 4 months per study.

findingsMega-analysis combining data from bars did not find a significant effect of glass size on volume of wine sold compared with 300-ml glasses: the volume of wine sold using 370-ml glasses was 0.5% lower [95% confidence interval (CI) = -8.1% to 6.1%], using 450-ml glasses was 1.0% higher (95% CI = -9.1 to 12.2) and using 510-ml glasses was 0.4% lower (95% CI = -9.4 to 9.4). For restaurants, compared with 300-ml glasses, the volume of wine sold using 250-ml glasses did not show a significant difference: 9.6% lower (95% CI = -19.0 to 0.7). Using 370-ml glasses the volume of wine sold was 7.3% higher (95% CI = 1.5% to 13.5%); no significant effect was found using 450-ml glasses: 0.9% higher (95% CI = -5.5 to 7.7).

conclusionsThe volume of wine sold in restaurants in England may be greater when 370-ml glasses are used compared with 300-ml wine glasses, but may not be in bars. This might be related to restaurants compared with bars selling more wine in bottles and carafes, which require free-pouring.

Indexed as

Alcohol DrinkingEnglandHumansPortion SizeRestaurantsWineAlcoholchoice architectureglass sizemega-analysismultiple treatment reversal designportion sizepurchasingreplicationsaleswine

Identifiers

PMID32003493
PMCPMC7496108
OpenAlexW3004413172

What OpenQuestion holds

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LicenceCC BY
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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.