Evidence map›Paper›PMID 31640634›Full record

SynthesisBMC psychiatry2019

Serum folate levels in bipolar disorder: a systematic review and meta-analysis.

Yung-Chi Hsieh, Li-Shiu Chou, Ching-Hua Lin, Hung-Chi Wu, Dian-Jeng Li, Ping-Tao Tseng

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC psychiatry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing 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

16 citing papers in PubMed.

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  14. Weissella: An Emerging Bacterium with Promising Health Benefits.Probiotics and antimicrobial proteins · 2021
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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

6 authors.

Yung-Chi HsiehKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan.
Li-Shiu ChouKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan.
Ching-Hua LinKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan.
Hung-Chi WuKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan.
Dian-Jeng LiKaohsiung Municipal Kai-Syuan Psychiatric Hospital, No.130, Kaisyuan 2nd Rd., Lingya Dist, Kaohsiung City, 802, Taiwan. edcrfvm45@gmail.com.ORCID 0000-0002-6036-045X
Ping-Tao TsengWinShine Clinics in Specialty of Psychiatry, Kaohsiung City, Taiwan. ducktseng@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBipolar disorder (BD) is a major psychiatric illness, however its physiopathology is unclear. The role of folate in the physiopathology of BD is controversial. We conducted this systematic review and meta-analysis to investigate the effect of folate in BD patients.

methodsWe performed a thorough literature study of the PubMed, Embase, ScienceDirect, ClinicalKey, Cochrane Library, ProQuest, Web of Science, and ClinicalTrials.gov databases until December 21st, 2018. Random effects meta-analysis was conducted.

resultsSix articles involving 481 patients with BD and 760 controls were included. The meta-analysis results suggested that serum folate levels in the patients with BD were significantly lower than those in the controls (Hedges' g = - 0.211, 95% confidence interval = - 0.391 to - 0.031, p = 0.021).

conclusionThe current meta-analysis show it might be association between lower serum folate levels and patient with BD. However, we could not distinguish the potentially confounding effects of mood states on the folate levels. Further prospective studies including subjects with different mood states and possible physiopathology are warranted to investigate the association between folate deficiency and the etiology of BD.

Indexed as

Nutritional StatusBipolar DisorderFemaleFolic AcidHumansMaleFolic AcidBiomarkerBipolar disorderFolateFolic acidMeta-analysis

Identifiers

PMID31640634
PMCPMC6805488

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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.