Evidence map›Paper›PMID 34721568›Full record

ArticleNeural plasticity2021

Levodopa Challenge Test Predicts STN-DBS Outcomes in Various Parkinson's Disease Motor Subtypes: A More Accurate Judgment.

Zijian Zheng, Zixiao Yin, Bohan Zhang, Houyou Fan, Dan Liu, Yuancheng Zhou, Jian Duan, Dongwei Zhou, Xi Wu, Guohui Lu

Open access · goldAbstract read
In one paragraph

Article in Neural plasticity, 2021. 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
1.1field-weighted citation impact, top 19% 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, 16 citations in OpenAlex.

  1. Pooled it
  2. Preoperative Functional Connectivity Predicts Antiparkinson Drug Change after Deep Brain Stimulation.Movement disorders : official journal of the Movement Disorder Society · 2026
    Article
  3. Article
  4. Impact of deep brain stimulation on cognitive impairment in Parkinson's disease: A retrospective longitudinal study.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Kinect-based objective assessment of the acute levodopa challenge test in parkinsonism: a feasibility study.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Tremor in Parkinson's Disease: From Pathophysiology to Advanced Therapies.Tremor and other hyperkinetic movements (New York, N.Y.) · 2022
    Review
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

10 authors at 2 institutions in 1 country.

Zijian ZhengDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Zixiao YinDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Bohan ZhangDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Houyou FanDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Dan LiuDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Yuancheng ZhouDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Jian DuanDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Dongwei ZhouDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.
Xi WuDepartment of Neurosurgery, Changhai Hospital of the Second Military Medical University of Chinese PLA, Shanghai, China.ORCID 0000-0002-1248-3420
Guohui LuDepartment of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.ORCID 0000-0001-6713-0000
Nanchang University · CNSecond Military Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: The relationship between the levodopa challenge test (LDCT) and postoperative subthalamic nucleus-deep brain stimulation (STN-DBS) benefits is controversial in patients with Parkinson's disease (PD). We aim to evaluate the value of total levodopa response (TLR) and symptom levodopa response (SLR) in predicting postoperative improvement in different PD motor subtypes. Methods: Studies were split into a training set (147 patients) and a validation set (304 patients). We retrospectively collected data from 147 patients who received the Unified Parkinson's Disease Rating Scale- (UPDRS-) III and the Parkinson's Disease Questionnaire- (PDQ-) 39 evaluation. Patients were classified into tremor-dominant (TD), akinetic-rigid-dominant (AR), and mixed (MX) groups. Clinically important difference (CID) was employed to dichotomize DBS effects. For patients in each subtype group from the training set, we used the correlation and receiver operator characteristic (ROC) curve analyses to explore the strength of their relations. Areas under the curve (AUCs) were calculated and compared through the DeLong test. Results developed from the training set were applied into the validation set to predict postoperative improvement in different PD motor subtypes. Results: In the validation cohort, TLR significantly correlated with postoperative motor ( Conclusions: We provide a more accurate judgment for LDCT. TLR strongly correlated with postoperative UPDRS-III and PDQ-39 improvement in MX patients. A TLR > 50% may indicate a higher possibility of clinically meaningful benefits from STN-DBS comparing to medication only. SLR can well predict QOL improvement in AR patients. Similarly, a SLR > 37% may indicate a higher possibility of clinically significant benefits from STN-DBS. LDCT provides limited information for TD patients.

Indexed as

JudgmentAgedAntiparkinson AgentsCohort StudiesDeep Brain StimulationFemaleFollow-Up StudiesHumansLevodopaMaleMiddle AgedParkinson DiseasePredictive Value of TestsReproducibility of ResultsRetrospective StudiesSubthalamic NucleusAntiparkinson AgentsLevodopa

Identifiers

PMID34721568
PMCPMC8553443
OpenAlexW3207156486

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.