Evidence map›Paper›PMID 34006944›Full record

ArticleScientific reports2021

The risk of fibromyalgia in patients with iron deficiency anemia: a nationwide population-based cohort study.

Wei-Cheng Yao, Hsuan-Ju Chen, Kam-Hang Leong, Kai-Lan Chang, Yu-Ting Tina Wang, Li-Chin Wu, Po-Ya Tung, Chien-Feng Kuo, Che-Chen Lin, Shin-Yi Tsai

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.5field-weighted citation impact, top 7% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Prevalence of Risk of Iron Deficiency.Canadian journal of pain = Revue canadienne de la douleur · 2026
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  19. Oxidative Stress in Fibromyalgia: From Pathology to Treatment.Oxidative medicine and cellular longevity · 2022
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 6 institutions in 1 country.

Wei-Cheng YaoDepartment of Anesthesiology and Pain Medicine, Min-Sheng General Hospital, Taoyuan City, Taiwan.
Hsuan-Ju ChenCollege of Medicine, China Medical University, Taichung City, Taiwan.
Kam-Hang LeongDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Kai-Lan ChangDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Yu-Ting Tina WangDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Li-Chin WuDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Po-Ya TungDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan.
Chien-Feng KuoDivision of Infectious Diseases, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan.
Che-Chen LinHealthcare Service Research Center (HSRC), Taichung Veterans General Hospital, Taichung, Taiwan.
Shin-Yi TsaiDepartment of Medicine, Mackay Medical College, New Taipei City, Taiwan. stsai22@jhu.edu.
Mackay Memorial Hospital · TWMackay Medical College · TWChina Medical University · TWMackay Junior College of Medicine, Nursing and Management · TWMin Sheng General Hospital · TWTaichung Veterans General Hospital · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Since iron is essential for neurotransmitter synthesis, decreased iron stores might lead to reduced production of biogenic amines which phenomenon was shown in Fibromyalgia (FM) patients. The aims are to investigate the association of iron deficiency anemia (IDA) and FM and to find the effects of different interventions. We conducted a study using the Taiwan National Health Insurance Research Database. The IDA cohort consisted of 13,381 patients with newly diagnosed IDA between 2000 and 2008. Each patient with IDA was frequency-matched with one people without IDA, by sex, age and index year. The Cox proportional hazards regression analysis was conducted to estimate the association between IDA and FM risk. The event was the occurrence of FM. The overall incidence density rate of FM in the IDA cohort was higher than in the non-IDA cohort with a multivariable Cox proportional hazards model measured adjusted hazard ratio [HR], 1.19; 95% confidence interval [CI], 1.13-1.25). When using non-IDA group as reference, we compared with different therapies for IDA. The adjusted HRs of FM were 1.38 (95% CI = 1.30-1.47), 1.10 (95% CI = 1.03-1.16), 1.18 (95% CI = 0.98-1.43) and 0.73 (95% CI = 0.58-0.90) for IDA patient without therapy, iron supplement alone, blood transfusion alone and both iron supplement and blood transfusion respectively. Our results suggest IDA is associated with an increased risk of FM. All patients should have iron supplementation both to correct anemia and replenish body stores.

Indexed as

AdolescentAdultAnemia, Iron-DeficiencyFemaleFibromyalgiaHumansMaleMiddle AgedProportional Hazards ModelsRetrospective StudiesRisk FactorsTaiwan

Identifiers

PMID34006944
PMCPMC8131369
OpenAlexW3163258336

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.