Evidence map›Paper›PMID 34424408›Full record

ArticleEJNMMI research2021

Sex correction improves the accuracy of clinical dopamine transporter imaging.

Emma A Honkanen, Tommi Noponen, Risto Hirvilammi, Kari Lindholm, Riitta Parkkola, Juho Joutsa, Andrea Varrone, Valtteri Kaasinen

Open access · goldAbstract read
In one paragraph

Article in EJNMMI research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 18% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 11 citations in OpenAlex.

  1. Pooled it
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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

8 authors at 2 institutions in 2 countries.

Emma A HonkanenClinical Neurosciences, University of Turku, Turku, Finland. ealhonk@utu.fi.ORCID http://orcid.org/0000-0003-3497-5706
Tommi NoponenDepartment of Clinical Physiology and Nuclear Medicine, University of Turku and Turku University Hospital, Turku, Finland.
Risto HirvilammiDepartment of Clinical Physiology and Nuclear Medicine, University of Turku and Turku University Hospital, Turku, Finland.
Kari LindholmClinical Neurosciences, University of Turku, Turku, Finland.
Riitta ParkkolaDepartment of Radiology, University of Turku and Turku University Hospital, Turku, Finland.
Juho JoutsaClinical Neurosciences, University of Turku, Turku, Finland.
Andrea VarroneDepartment of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm Health Care Services, Stockholm, Sweden.
Valtteri KaasinenClinical Neurosciences, University of Turku, Turku, Finland.
University of Turku · FIKarolinska Institutet · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn clinical diagnostic imaging, dopamine transporter (DAT) SPECT scans are commonly evaluated using automated semiquantitative analysis software. Age correction is routinely implemented, but usually no sex correction of DAT binding is performed. Since there are sex differences in presynaptic dopaminergic function, we investigated the effect of DAT sex correction in a sample of healthy volunteers who underwent brain [

methodsForty healthy elderly individuals (21 men and 19 women) underwent brain [

resultsIn the analysis without sex correction, compared to the mean ratio of the reference database, ten healthy individuals (8 men and 2 women) had abnormally low DAT binding ratios, and four individuals (3 men and 1 woman) had borderline low DAT binding ratios in at least one striatal region. When sex correction was implemented, the ratio of one individual was abnormal, and the ratio of one individual was borderline (both males). There were no clinically significant differences in motor or non-motor symptoms between healthy volunteers with abnormal and normal binding.

conclusionsA considerable number of elderly healthy male subjects can be interpreted to be dopaminergically abnormal if no sex correction of DAT binding is performed. Sex differences in striatal dopaminergic function should be taken into account when DAT imaging is used to assist clinical diagnostics in patients with suspected neurological disorders.

Indexed as

Dopamine transporterHealthySex correctionSPECT

Identifiers

PMID34424408
PMCPMC8382816
OpenAlexW3195657824

What OpenQuestion holds

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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.