Evidence map›Paper›PMID 34620927›Full record

ArticleScientific reports2021

Higher hemoglobin levels are an independent risk factor for adverse metabolism and higher mortality in a 20-year follow-up.

Joona Tapio, Hannu Vähänikkilä, Y Antero Kesäniemi, Olavi Ukkola, Peppi Koivunen

Abstract 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. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
–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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
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  7. Article
  8. Observational
  9. Association between hemoglobin-to-creatinine ratio and all-cause mortality in patients with coronary artery disease.The Egyptian heart journal : (EHJ) : official bulletin of the Egyptian Society of Cardiology · 2025
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  19. Association of hemoglobin levels with metabolic traits in women with PCOS.Acta obstetricia et gynecologica Scandinavica · 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.

Joona TapioBiocenter Oulu and Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, P.O. Box 5400, 90014, Oulu, Finland.
Hannu VähänikkiläNorthern Finland Birth Cohorts, Arctic Biobank, Infrastructure for Population Studies, Faculty of Medicine, University of Oulu, 90014, Oulu, Finland.
Y Antero KesäniemiMedical Research Center Oulu, Faculty of Medicine, Oulu University Hospital and Research Unit of Internal Medicine, University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.
Olavi UkkolaMedical Research Center Oulu, Faculty of Medicine, Oulu University Hospital and Research Unit of Internal Medicine, University of Oulu, P.O. Box 5000, 90014, Oulu, Finland. olavi.ukkola@oulu.fi.
Peppi KoivunenBiocenter Oulu and Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, P.O. Box 5400, 90014, Oulu, Finland. peppi.koivunen@oulu.fi.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The aim of this study was to cross-sectionally and longitudinally examine whether higher hemoglobin (Hb) levels within the normal variation associate with key components of metabolic syndrome and total and cardiovascular mortality. The study included 967 Finnish subjects (age 40-59 years) followed for ≥ 20 years. The focus was on Hb levels, cardiovascular diseases (CVDs) and mortality rates. Higher Hb levels associated positively with key anthropometric and metabolic parameters at baseline. At the follow-up similar associations were seen in men. The highest Hb quartile showed higher leptin levels and lower adiponectin levels at baseline and follow-up (p < 0.05) and lower plasma ghrelin levels at baseline (p < 0.05). Higher baseline Hb levels associated independently with prevalence of type 2 diabetes at follow-up (p < 0.01). The highest Hb quartile associated with higher serum alanine aminotransferase levels (p < 0.001) and independently with increased risk for liver fat accumulation (OR 1.63 [1.03; 2.57]) at baseline. The highest Hb quartile showed increased risk for total (HR = 1.48 [1.01; 2.16]) and CVD-related mortality (HR = 2.08 [1.01; 4.29]). Higher Hb levels associated with an adverse metabolic profile, increased prevalence of key components of metabolic syndrome and higher risk for CVD-related and total mortality.

Indexed as

AdiponectinAdultAgedCardiovascular DiseasesCause of DeathDiabetes Mellitus, Type 2FemaleFinlandFollow-Up StudiesGhrelinHemoglobinsHumansLeptinMaleMetabolic SyndromeMiddle AgedAdiponectinGhrelinHemoglobinsLeptin

Identifiers

PMID34620927
PMCPMC8497471

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.