Evidence map›Paper›PMID 33832530›Full record

ArticleArthritis research & therapy2021

Change in dietary inflammatory index score is associated with control of long-term rheumatoid arthritis disease activity in a Japanese cohort: the TOMORROW study.

Yoshinari Matsumoto, Nitin Shivappa, Yuko Sugioka, Masahiro Tada, Tadashi Okano, Kenji Mamoto, Kentaro Inui, Daiki Habu, James R Hebert, Tatsuya Koike

Abstract read
In one paragraph

Article in Arthritis research & therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–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

21 citing papers in PubMed.

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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

10 authors.

Yoshinari MatsumotoShirahama Foundation for Health and Welfare, Search Institute for Bone and Arthritis Disease (SINBAD), Nishimuro-gun, Shirahama-cho 1447, Wakayama, 649-2211, Japan.
Nitin ShivappaCancer Prevention and Control Program and Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, 915 Greene Street, Suite 241-2, Columbia, SC, 29208, USA.
Yuko SugiokaCenter for Senile Degenerative Disorders (CSDD), Osaka City University Medical School, Abeno-ku, Asahimachi 1-4-3, Osaka, 545-8585, Japan.
Masahiro TadaDepartments of Orthopaedic Surgery, Osaka City University Medical School, Abeno-ku, Asahimachi 1-4-3, Osaka, 545-8585, Japan.
Tadashi OkanoDepartments of Orthopaedic Surgery, Osaka City University Medical School, Abeno-ku, Asahimachi 1-4-3, Osaka, 545-8585, Japan.
Kenji MamotoDepartments of Orthopaedic Surgery, Osaka City University Medical School, Abeno-ku, Asahimachi 1-4-3, Osaka, 545-8585, Japan.
Kentaro InuiDepartments of Orthopaedic Surgery, Osaka City University Medical School, Abeno-ku, Asahimachi 1-4-3, Osaka, 545-8585, Japan.
Daiki HabuDepartment of Medical Nutrition, Osaka City University Graduate School of Human Life Science, Sumiyoshi-ku, Sugimoto-cho 3-3-138, Osaka, 558-8585, Japan.
James R HebertCancer Prevention and Control Program and Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, 915 Greene Street, Suite 241-2, Columbia, SC, 29208, USA.
Tatsuya KoikeShirahama Foundation for Health and Welfare, Search Institute for Bone and Arthritis Disease (SINBAD), Nishimuro-gun, Shirahama-cho 1447, Wakayama, 649-2211, Japan. tatsuya@med.osaka-cu.ac.jp.ORCID 0000-0002-1522-8740

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe dietary inflammatory index (DII®), a quantitative measure of the inflammatory potential of daily food and nutrient intake, and associations between a variety of health outcomes have been reported. However, the association between DII score and disease activity of rheumatoid arthritis (RA) is unclear. Therefore, this study was designed to test whether higher DII score contributes to disease activity and as a corollary, whether reducing DII score helps to achieve or maintain low disease activity or remission in patients with RA.

methodsWe performed a cross-sectional and longitudinal analysis using 6 years of data (from 2011 to 2017) in TOMORROW, a cohort study consisting of 208 RA patients and 205 gender- and age-matched controls started in 2010. Disease activity of RA patients was assessed annually using DAS28-ESR (disease activity score 28 joints and the erythrocyte sedimentation rate) as a composite measure based on arthritic symptoms in 28 joints plus global health assessment and ESR. Dietary data were collected in 2011 and 2017 using the brief-type self-administered diet history questionnaire (BDHQ). Energy-adjusted DII (E-DII™) score was calculated using 26 nutrients derived from the BDHQ. Data were analyzed with two-group comparisons, correlation analysis, and multivariable logistic regression analysis.

resultsOne hundred and seventy-seven RA patients and 183 controls, for whom clinical and dietary survey data were available, were analyzed. RA patients had significantly higher E-DII (pro-inflammatory) score compared to controls both in 2011 and 2017 (p < 0.05). In RA patients, E-DII score was not a factor associated with significant change in disease activity. However, anti-inflammatory change in E-DII score was associated maintaining low disease activity (DAS28-ESR ≤ 3.2) or less for 6 years (OR 3.46, 95% CI 0.33-8.98, p = 0.011).

conclusionsThe diets of RA patients had a higher inflammatory potential than controls. Although E-DII score was not a factor associated with significant disease activity change, anti-inflammatory change in E-DII score appeared to be associated with maintaining low disease activity in patients with RA.

trial registrationUMIN Clinical Trials Registry, UMIN000003876 . Registered 7 Aug 2010-retrospectively registered.

Indexed as

Arthritis, RheumatoidDietCohort StudiesCross-Sectional StudiesHumansInflammationJapanDietInflammationLifestyleNutritionRheumatoid arthritis

Identifiers

PMID33832530
PMCPMC8028141

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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.