Evidence map›Paper›PMID 31172295›Full record

SynthesisActa diabetologica2020

The healthy Nordic diet for blood glucose control: a systematic review and meta-analysis of randomized controlled clinical trials.

Alireza Zimorovat, Mohammad Mohammadi, Nahid Ramezani-Jolfaie, Amin Salehi-Abargouei

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Acta diabetologica, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 6 pooled it
–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

19 citing papers in PubMed, 6 syntheses or guidelines pooled it.

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  18. The potential impacts of obesity on COVID-19.Clinical medicine (London, England) · 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

4 authors.

Alireza ZimorovatNutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Mohammad MohammadiNutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Nahid Ramezani-JolfaieNutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Amin Salehi-AbargoueiNutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. abargouei@ssu.ac.ir.ORCID http://orcid.org/0000-0002-7580-6717

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsInvestigations on the possible effect of the Nordic diet (ND) on the glycemic control and the risk of diabetes have led to inconsistent results. The present study tried to determine the effect of the ND on the markers of blood glucose control using a systematic review and meta-analysis of randomized controlled clinical trials (RCTs).

methodsPredefined keywords were used to search PubMed, ISI Web of Science, Scopus and Google Scholar up to April 2019. The random effects model was used to compute the overall estimates.

resultsIn total, six RCTs with 618 participants (6-26 weeks of follow-up period) were included in the present study. The meta-analysis revealed that the ND might not have a considerable effect on fasting blood glucose levels [weighted mean difference (WMD) = -0.05 mmol/l, 95% CI - 0.13, 0.01, P = 0.112]. In contrast, the analyses showed that the ND significantly reduces serum insulin concentrations (WMD = -1.12 mU/l, 95% CI - 1.84, - 0.39, P = 0.002) and the homeostasis model assessment for insulin resistance (HOMA-IR) (WMD = - 0.34, 95% CI - 0.53, - 0.14, P = 0.001) compared to control diets. The effect on serum insulin levels was sensitive to one of the included studies. This dietary pattern did not significantly affect 2-h post-prandial blood glucose and Matsuda index.

conclusionsAdherence to the ND might improve serum insulin and HOMA-IR levels; however, this effect was not confirmed for other markers of blood glucose control. Future well-designed and long-term clinical trials are highly recommended.

Indexed as

AdultAgedBiomarkersBlood GlucoseDiabetes MellitusFemaleHumansInsulinInsulin ResistanceMaleMiddle AgedRandomized Controlled Trials as TopicBiomarkersBlood GlucoseInsulinBaltic sea dietFasting blood sugarHOMA-IRInsulinMeta-analysisNordic diet

Identifiers

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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.