Evidence map›Paper›PMID 25889014›Full record

ArticleThe international journal of behavioral nutrition and physical activity2015

Categorisation of built environment characteristics: the trouble with tertiles.

Karen E Lamb, Simon R White

Open access · goldAbstract read
In one paragraph

Article in The international journal of behavioral nutrition and physical activity, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 4 pooled it
9.1field-weighted citation impact, top 3% 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

17 citing papers in PubMed, 4 syntheses or guidelines pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. The neighbourhood physical environment and active travel in older adults: a systematic review and meta-analysis.The international journal of behavioral nutrition and physical activity · 2017
    Pooled it
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  11. The use and misuse of ratio and proportion exposure measures in food environment research.The international journal of behavioral nutrition and physical activity · 2020
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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

2 authors at 2 institutions in 2 countries.

Karen E LambCentre for Physical Activity and Nutrition Research, Deakin University, Burwood, VIC, 3125, Australia. karen.lamb@deakin.edu.au.
Simon R WhiteMedical Research Council Biostatistics Unit, Cambridge Institute of Public Health, Cambridge, CB2 0SR, UK. simon.white@mrc-bsu.cam.ac.uk.
Deakin University · AUMedical Research Council · GB

Funding

Medical Research Council MC_U105292687Medical Research Council U105292687
6 · The paper itself

Abstract

backgroundIn the analysis of the effect of built environment features on health, it is common for researchers to categorise built environment exposure variables based on arbitrary percentile cut-points, such as median or tertile splits. This arbitrary categorisation leads to a loss of information and a lack of comparability between studies since the choice of cut-point is based on the sample distribution. DISCUSSION: In this paper, we highlight the various drawbacks of adopting percentile categorisation of exposure variables. Using data from the SocioEconomic Status and Activity in Women (SESAW) study from Melbourne, Australia, we highlight alternative approaches which may be used instead of percentile categorisation in order to assess built environment effects on health. We discuss these approaches using an example which examines the association between the number of accessible supermarkets and body mass index. We show that alternative approaches to percentile categorisation, such as transformations of the exposure variable or factorial polynomials, can be implemented easily using standard statistical software packages. These procedures utilise all of the available information available in the data, avoiding a loss of power as experienced when categorisation is adopted.We argue that researchers should retain all available information by using the continuous exposure, adopting transformations where necessary.

Indexed as

Environment DesignHealth BehaviorObesityResearch DesignResidence CharacteristicsAustraliaBody Mass IndexCommerceFemaleHumansModels, BiologicalTransportation

Identifiers

PMID25889014
PMCPMC4335683
OpenAlexW2096368700

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.