Evidence map›Paper›PMID 34568970›Full record

ArticleJournal of neural transmission (Vienna, Austria : 1996)2021

Plasma neurofilament light chain level and orthostatic hypotension in early Parkinson's disease.

Don Gueu Park, Jae Whan Kim, Young-Sil An, Jaerak Chang, Jung Han Yoon

Abstract read
PubMed Publisher
In one paragraph

Article in Journal of neural transmission (Vienna, Austria : 1996), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 3 pooled it
1.6field-weighted citation impact, top 14% 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

13 citing papers in PubMed, 3 syntheses or guidelines pooled it, 21 citations in OpenAlex.

  1. Elevated neurofilament light chain (NfL) in blood and CSF as a biomarker for Parkinson's disease cognitive impairment: A meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Pooled it
  2. Prevalence and impact of orthostatic hypotension in Parkinson's disease: a systematic review and meta-analysis.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2025
    Pooled it
  3. Pooled it
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  10. Blood neurofilament light chain in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2023
    Review
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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 1 institution in 1 country.

Don Gueu ParkDepartment of Neurology, Parkinson Center, Ajou University School of Medicine, Suwon, Republic of Korea.
Jae Whan KimDepartment of Biomedical Sciences, Ajou University School of Medicine, Suwon, Republic of Korea.
Young-Sil AnDepartment of Nuclear Medicine, Ajou University School of Medicine, Suwon, Republic of Korea.
Jaerak ChangDepartment of Biomedical Sciences, Ajou University School of Medicine, Suwon, Republic of Korea. jaerakchang@ajou.ac.kr.
Jung Han YoonDepartment of Neurology, Parkinson Center, Ajou University School of Medicine, Suwon, Republic of Korea. jhyoon@ajou.ac.kr.ORCID 0000-0001-6180-9848
Ajou University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To delineate the impact of non-motor markers (REM sleep behavior disorder (RBD), orthostatic hypotension (OH), cardiac sympathetic denervation, hyposmia) on neuronal injury in early-stage Parkinson's disease (PD), we measured the plasma neurofilament light chain (NFL) level of PD patients and evaluated its relationship with these markers. The study population comprised a cohort of 77 patients with PD and 54 controls. OH was assessed using 5-min head-up tilt-table test. Other clinical parameters such as RBD, Unified Parkinson's Disease Rating Scale (UPDRS), cognition, Cross-Cultural Smell Identification Test (CCSIT), white matter hyperintensity (WMH), cardiac metaiodobenzylguanidine (MIBG) and striatal dopamine transporter (DAT) uptake were assessed. Plasma NFL levels were measured using Simoa platform. During mean 24.8 months of follow-up, 70 patients remained PD, 5 patients converted to Parkinson-plus syndrome (P + converter), and 2 were lost to follow-up. NFL level did not differ between PD and control groups (age-adjusted means 10.40 pg/mL vs 9.51 pg/mL, p = 0.151), but PD patients with OH (median 15.31 pg/mL) had higher levels compared with those without OH (median 9.2 pg/mL, p = 0.008), as well as the control group (median 9.7 pg/mL, p = 0.002). P + converter group had the highest plasma NFL level (38.17 pg/mL, p < 0.001). In a multiple regression analysis, OH, age, and disease duration independently correlated with plasma NFL level. This finding adds biomarker-based evidence for poor clinical outcomes associated with OH in patients with PD.

Indexed as

Hypotension, OrthostaticParkinson DiseaseREM Sleep Behavior Disorder3-IodobenzylguanidineHumansIntermediate Filaments3-IodobenzylguanidineMIBGNFLOrthostatic hypotensionParkinson’s diseaseRBD

Identifiers

PMID34568970
OpenAlexW3202416588

What OpenQuestion holds

Textmetadata
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.