Evidence map›Paper›PMID 31558164›Full record

ArticleBMC neurology2019

The impact of C-reactive protein levels on headache frequency in the HUNT study 2006-2008.

Knut Hagen, Lars Jacob Stovner, Kristian Bernhard Nilsen, Espen Saxhaug Kristoffersen, Bendik Slagsvold Winsvold

Open access · goldAbstract read
In one paragraph

Article in BMC neurology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 22% 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.

  1. Pooled it
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  3. Association between serum high-sensitivity C-reactive protein levels and migraine: a REFORM study.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
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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

5 authors at 3 institutions in 1 country.

Knut HagenDepartment of Neuromedicine and Movement science, NTNU Norwegian University of Science and Technology, 7491, Trondheim, Norway. knut.hagen@ntnu.no.ORCID http://orcid.org/0000-0003-2111-8895
Lars Jacob StovnerDepartment of Neuromedicine and Movement science, NTNU Norwegian University of Science and Technology, 7491, Trondheim, Norway.
Kristian Bernhard NilsenDepartment of Neurology, Oslo University Hospital, Oslo, Norway.
Espen Saxhaug KristoffersenDepartment of General Practice, HELSAM, University of Oslo, Oslo, Norway.
Bendik Slagsvold WinsvoldDepartment of Neurology and FORMI, Oslo University Hospital, Oslo, Norway.
Norwegian University of Science and Technology · NOOslo University Hospital · NOUniversity of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIncreased high sensitivity C- reactive protein (hs-CRP) levels have been found in many earlier studies on migraine, and recently also in persons with migraine and insomnia. The aim of this study was to see whether these findings could be reproduced in a large-scale population-based study.

methodsA total of 50,807 (54%) out of 94,194 invited aged ≥20 years or older participated in the third wave of the Nord-Trøndelag Health Study study performed in 2006-2008. Among these, 38,807 (41%) had valid measures of hs-CRP and answered questions on headache and insomnia. Elevated hs-CRP was defined as > 3.0 mg/L. The cross-sectional association with headache was estimated by multivariate analyses using multiple logistic regression. The precision of the odds ratio (OR) was assessed with 95% confidence interval (CI).

resultsIn the fully adjusted model, elevated hs-CRP was associated with migraine (OR 1.14, 95% CI 1.04-1.25) and migraine with aura (OR 1.15, 95% CI 1.03-1.29). The association was strongest among individuals with headache ≥15 days/month for any headache (OR 1.26, 95% CI 1.08-1.48), migraine (OR 1.62, 95% CI 1.21-2.17), and migraine with aura (OR 1.84, 95% CI 1.27-2.67). No clear relationship was found between elevated hs-CRP and headache less than 7 days/month or with insomnia.

conclusionsCross-sectional data from this large-scale population-based study showed that elevated hs-CRP was associated with headache ≥7 days/month, especially evident for migraine with aura.

Indexed as

C-Reactive ProteinSleep Initiation and Maintenance DisordersAdultAgedComorbidityCross-Sectional StudiesFemaleHumansMaleMiddle AgedMigraine DisordersNorwayYoung AdultC-Reactive Protein

Identifiers

PMID31558164
PMCPMC6764126
OpenAlexW2975873376

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.