Evidence map›Paper›PMID 30176950›Full record

ArticlePublic health nutrition2018

Estimated vitamin D synthesis and dietary vitamin D intake among Asians in two distinct geographical locations (Kuala Lumpur, 3°N v. Aberdeen, 57°N) and climates.

Nor Aini Jamil, Meng Hooi Yew, Yatiman Noor Hafizah, Stuart R Gray, Bee Koon Poh, Helen M Macdonald

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Public health nutrition, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 18% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.

  1. Pooled it
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  4. Observational
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  6. Review
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  12. Sunscreen photoprotection and vitamin D status.The British journal of dermatology · 2019
    Review
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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 at 2 institutions in 2 countries.

Nor Aini Jamil1School of Medicine,Medical Sciences and Nutrition,University of Aberdeen,Foresterhill,Aberdeen AB25 2ZD,UK.
Meng Hooi Yew2School of Healthcare Sciences,Faculty of Health Sciences,Universiti Kebangsaan Malaysia,Kuala Lumpur 50300,Malaysia.
Yatiman Noor Hafizah2School of Healthcare Sciences,Faculty of Health Sciences,Universiti Kebangsaan Malaysia,Kuala Lumpur 50300,Malaysia.
Stuart R Gray1School of Medicine,Medical Sciences and Nutrition,University of Aberdeen,Foresterhill,Aberdeen AB25 2ZD,UK.
Bee Koon Poh2School of Healthcare Sciences,Faculty of Health Sciences,Universiti Kebangsaan Malaysia,Kuala Lumpur 50300,Malaysia.
Helen M Macdonald1School of Medicine,Medical Sciences and Nutrition,University of Aberdeen,Foresterhill,Aberdeen AB25 2ZD,UK.
National University of Malaysia · MYUniversity of Aberdeen · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo compare the contributions of UVB exposure and diet to total vitamin D among Asians living in Kuala Lumpur (KL) and Aberdeen (AB).

designLongitudinal study.

settingUVB exposure (using polysulfone film badges) and skin colour and dietary vitamin D intake (by web-based questionnaire) were measured at each season in AB and during south-west (SWM) and north-east monsoons (NEM) in KL. SUBJECTS: One hundred and fifteen Asians in KL and eighty-five Asians in AB aged 20-50 years.

resultsMedian summer UVB exposure of Asians in AB (0·25 SED/d) was higher than UVB exposure for the KL participants (SWM=0·20 SED/d, P=0·02; NEM= 0·14 SED/d, P<0·01). UVB exposure was the major source of vitamin D in KL year-round (60%) but only during summer in AB (59%). Median dietary vitamin D intake was higher in AB (3·50 µg/d (140 IU/d)), year-round, than in KL (SWM=2·05 µg/d (82 IU/d); NEM=1·83 µg/d (73 IU/d), P<0·01). Median total vitamin D (UVB plus diet) was higher in AB only during summer (8·45 µg/d (338 IU/d)) compared with KL (SWM=6·03 µg/d (241 IU/d), P=0·04; NEM=5·35 µg/d (214 IU/d), P<0·01), with a comparable intake across the full year (AB=5·75 µg/d (230 IU/d); KL=6·15 µg/d (246 IU/d), P=0·78).

conclusionsUVB exposure among Asians in their home country is low. For Asians residing at the northerly latitude of Scotland, acquiring vitamin D needs from UVB exposure alone (except in summer) may be challenging due to low ambient UVB in AB (available only from April to October).

Indexed as

Asian PeopleClimateDietSeasonsSunlightVitamin DVitamin D DeficiencyAdultFemaleHumansLongitudinal StudiesMalaysiaMaleMiddle AgedNutritional StatusRainVitamin DVitaminsEthnicPolysulfone badgesSunlight exposure behaviourUVB exposure

Identifiers

PMID30176950
PMCPMC10261077
OpenAlexW2891930399

What OpenQuestion holds

Textmetadata
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.