Evidence map›Paper›PMID 29971976›Full record

ArticleJournal of clinical neurology (Seoul, Korea)2018

Effect of Vitamin D Deficiency on the Frequency of Headaches in Migraine.

Tae Jin Song, Min Kyung Chu, Jong Hee Sohn, Hong Yup Ahn, Sun Hwa Lee, Soo Jin Cho

Open access · diamondAbstract read
In one paragraph

Article in Journal of clinical neurology (Seoul, Korea), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
4.1field-weighted citation impact, top 5% 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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 56 citations in OpenAlex.

  1. Pooled it
  2. Vitamin D in migraine headache: a comprehensive review on literature.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2019
    Pooled it
  3. Review
  4. Article
  5. Vitamin D and Brain Health.Advances in experimental medicine and biology · 2026
    Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Review
  11. Article
  12. Review
  13. Vitamin D receptor and binding protein genes variants in patients with migraine.Annals of clinical and translational neurology · 2023
    Article
  14. Review
  15. Article
  16. Observational
  17. Vitamin D in Neurological Diseases.International journal of molecular sciences · 2022
    Review
  18. Elevated Bone Resorption Markers in Patients With Migraine: A Case Series.Journal of clinical neurology (Seoul, Korea) · 2022
    Article
  19. Review on Headache Related to Dietary Supplements.Current pain and headache reports · 2022
    Review
  20. Article
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 5 institutions in 1 country.

Tae Jin SongDepartment of Neurology, College of Medicine, Ewha Womans University, Seoul, Korea.
Min Kyung ChuDepartment of Neurology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
Jong Hee SohnDepartment of Neurology, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea.
Hong Yup AhnDepartment of Statistics, Dongguk University, Seoul, Korea.
Sun Hwa LeeDepartment of Neurology, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
Soo Jin ChoDepartment of Neurology, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea. dowonc@naver.com.
Hallym University Dongtan Sacred Heart Hospital · KRDongguk University · KREwha Womans University · KRHallym University Chuncheon Sacred Heart Hospital · KRHallym University Kangnam Sacred Heart Hospital · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeThe risk of vitamin D deficiency varies with the season. The frequency of vitamin D deficiency in migraine patients and its association with migraine are unclear.

methodsWe retrospectively evaluated first-visit migraine patients between January 2016 and May 2017, and investigated the demographics, season, migraine subtypes, frequency, severity, and impact of migraine, psychological and sleep variables, climate factors, and vitamin D levels. The nonfasting serum 25-hydroxyvitamin D concentration was measured to determine the vitamin D level, with deficiency of vitamin D defined as a concentration of <20 ng/mL.

resultsIn total, 157 patients with migraine aged 37.0±8.6 years (mean±standard deviation) were analyzed. Their serum level of vitamin D was 15.9±7.4 ng/mL. Vitamin D deficiency was present in 77.1% of the patients, and occurred more frequently in spring and winter than in summer and autumn (89.1%, 85.7%, 72.4%, and 61.7%, respectively; p=0.008). In multivariate Poisson regression analysis, monthly headache was 1.203 times (95% confidence interval=1.046-1.383, p=0.009) more frequent in patients with vitamin D deficiency than in those without deficiency after adjusting for demographics, season, migraine subtype, depression, anxiety, and sleep quality. These associations were consistently noted in subgroup analysis of episodic migraine (odds ratio=1.266, p=0.033) and chronic migraine (odds ratio=1.390, p=0.041).

conclusionsOur study found that a larger number of monthly days with headache was related to vitamin D deficiency among migraineurs. Future studies should attempt to confirm the causal relationship between vitamin D deficiency and migraine.

Indexed as

migraineseasonal variationsummervitamin Dwinter

Identifiers

PMID29971976
PMCPMC6031995
OpenAlexW2810861445

What OpenQuestion holds

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LicenceCC BY-NC
Read underepoch 390

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.