Evidence map›Paper›PMID 31152214›Full record

ArticleEuropean journal of nutrition2020

Vitamin B6 intake and incidence of diabetic retinopathy in Japanese patients with type 2 diabetes: analysis of data from the Japan Diabetes Complications Study (JDCS).

Chika Horikawa, Rei Aida, Chiemi Kamada, Kazuya Fujihara, Shiro Tanaka, Sachiko Tanaka, Atsushi Araki, Yukio Yoshimura, Tatsumi Moriya, Yasuo Akanuma and 2 more

Abstract readMulticenter Study
PubMed Publisher
In one paragraph

Article in European journal of nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 3 pooled it
2.2field-weighted citation impact, top 13% 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

25 citing papers in PubMed, 3 syntheses or guidelines pooled it, 41 citations in OpenAlex.

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  6. B Vitamins and Ocular Health.Clinical ophthalmology (Auckland, N.Z.) · 2026
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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

12 authors at 6 institutions in 1 country.

Chika HorikawaDepartment of Health and Nutrition, University of Niigata Prefecture Faculty of Human Life Studies, 471 Ebigase, Higashi-ku, Niigata, 950-8680, Japan.
Rei AidaDepartment of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
Chiemi KamadaTraining Department of Administrative Dietitians, Shikoku University, 123-1 Ebisuno, Furukawa, Ojin-cho, Tokushima, Tokushima, 771-1151, Japan.
Kazuya FujiharaDepartment of Hematology, Endocrinology, and Metabolism, Niigata University Faculty of Medicine, 1-757 Asahimachi-dori, Chuoh-ku, Niigata, 951-8510, Japan.
Shiro TanakaDepartment of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
Sachiko TanakaDepartment of Public Health, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Sihga, 520-2192, Japan.
Atsushi ArakiDepartment of Endocrinology and Metabolism, Tokyo Metropolitan Geriatric Hospital, 35-2 Sakaecho, Itabashi-ku, Tokyo, 173-0015, Japan.
Yukio YoshimuraDepartment of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
Tatsumi MoriyaHealth Care Center, Kitasato University, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan.
Yasuo AkanumaThe Institute for Adult Diseases, Asahi Life Foundation, 2-2-6 Nihonbashibakurocho, Chuo-ku, Tokyo, 103-0002, Japan.
Hirohito SoneDepartment of Hematology, Endocrinology, and Metabolism, Niigata University Faculty of Medicine, 1-757 Asahimachi-dori, Chuoh-ku, Niigata, 951-8510, Japan. sone@med.niigata-u.ac.jp.ORCID http://orcid.org/0000-0003-1263-2817
Japan Diabetes Complications Study Group
Kyoto University · JPShiga University of Medical Science · JPShikoku University · JPThe Institute of Medical Science, Asahi Life Foundation · JPUniversity of Niigata Prefecture · JPNiigata University Medical and Dental Hospital · JP

Funding

Japan Society for the Promotion of Science 16H03260
6 · The paper itself

Abstract

purposeAlthough vitamin B6 has been suspected to prevent the progression of diabetic retinopathy, evidence of this in patients with type 2 diabetes based on longitudinal studies is sparse. This study investigated the relationship between vitamin B6 intake and the incidence of diabetic retinopathy in Japanese patients with type 2 diabetes.

methodsThe study was part of an examination of a nationwide cohort of patients with type 2 diabetes aged 40-70 years with HbA1c ≥ 48 mmol/mol. After excluding nonresponders to a dietary survey using the Food Frequency Questionnaire based on food groups, 978 patients were analyzed. Primary outcome was the 8-year risk of a diabetic retinopathy event, and Cox regression analyses estimated hazard ratios (HRs) for retinopathy according to vitamin B6 intake adjusted for age, gender, body mass index, HbA1c, smoking, energy intake, and other confounders.

resultsMean vitamin B6 intake in quartiles ranged from 1.1 to 1.6 mg/day, and half of the participants had vitamin B6 intake below the recommended daily dietary allowance according to dietary reference intakes in Japanese adults (men 1.4 mg/day; women 1.2 mg/day). After adjusting for confounders, HRs for diabetic retinopathy in the 2nd, 3rd, and 4th quartile groups of vitamin B6 intake compared with the 1st quartile group were 1.17 (95% confidence interval 0.81-1.69, p = 0.403), 0.88 (0.58-1.34, p = 0.550), and 0.50 (0.30-0.85, p = 0.010), respectively.

conclusionsFindings suggested that high vitamin B6 intake was associated with a lower incidence of diabetic retinopathy in Japanese with type 2 diabetes.

Indexed as

AdultAgedCohort StudiesDiabetes Mellitus, Type 2Diabetic RetinopathyDietFemaleHumansIncidenceJapanMaleMiddle AgedNutritional StatusProspective StudiesVitamin B 6Vitamin B ComplexVitamin B 6Vitamin B ComplexDiabetic retinopathyMedical nutrition therapyType 2 diabetesVitamin B6 intake

Identifiers

PMID31152214
OpenAlexW2947689354

What OpenQuestion holds

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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.