Evidence map›Paper›PMID 33380779›Full record

ArticleMolecular vision2020

A hospital-based five-year prospective study on the prevalence of Leber's hereditary optic neuropathy with genetic confirmation.

Poigaialwar Gowri, Shanmugam Mahesh Kumar, Ayyasamy Vanniarajan, Devarajan Bharanidharan, Periasamy Sundaresan

Open access · greenAbstract read
In one paragraph

Article in Molecular vision, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
0.7field-weighted citation impact, top 32% 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

9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Maculopapillary Bundle Degeneration in Optic Neuropathies.Current neurology and neuroscience reports · 2024
    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.

Poigaialwar GowriDepartment of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.
Shanmugam Mahesh KumarNeuro Ophthalmology Clinic, Aravind Eye Hospital, Madurai, Tamil Nadu, India.
Ayyasamy VanniarajanDepartment of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.
Devarajan BharanidharanDepartment of Bioinformatics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.
Periasamy SundaresanDepartment of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.
Alagappa University · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Purpose: To estimate the prevalence of Leber hereditary optic neuropathy (LHON) along with genetic screening at a tertiary eye care center in southern India. Methods: Patients with LHON were identified at the Neuro-Ophthalmology Clinic, Aravind Eye Hospital (AEH; Madurai, India) from 2015 to 2019. Clinical data were collected along with blood samples. Genetic testing was performed for the confirmation of LHON using a multiplex PCR restriction fragment length polymorphism (RFLP) approach to detect the primary mutations 3460A, 11778A, and 14484C in mitochondrial DNA (mtDNA). Results: During the study period, 1,598,441 outpatients attended AEH of whom 40,527 were referred to the Neuro-Ophthalmology Clinic. Among them, 55 patients were diagnosed with LHON. The male to female ratio was 8.2:1.0, and the mean age at onset was 20.95 years (SD 8.940). The estimated prevalence was 1:737 or 13.57 per 10,000 (95% confidence intervals [CI] 10.23-17.66) at the Neuro-Ophthalmology Clinic. The frequency of primary mutations in the patients with LHON was determined as 43.6% (24/55), giving a prevalence of 1:1689 or 5.92 per 10,000 (95% CI 3.78-8.81). Conclusions: The high prevalence of LHON observed at a single hospital highlights the impact of the disease in southern India. As the epidemiology of LHON remains unexplored in this region, these findings will pave the way to evaluate the national prevalence. Further, screening the whole mitochondrial genome may help to increase the detection of mutations to estimate the accurate prevalence of the disease.

Indexed as

HospitalsAdolescentAdultAge of OnsetBase SequenceChildChild, PreschoolFemaleGenome, MitochondrialHumansIndiaMaleMiddle AgedMutationOptic Atrophy, Hereditary, LeberPolymorphism, Restriction Fragment Length

Identifiers

PMID33380779
PMCPMC7769124
OpenAlexW3114246218

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.