Evidence map›Paper›PMID 35987635›Full record

ArticleOrphanet journal of rare diseases2022

Incidence of Leber hereditary optic neuropathy in 2019 in Japan: a second nationwide questionnaire survey.

Fumio Takano, Kaori Ueda, Daniel A Godefrooij, Akiko Yamagami, Hiroto Ishikawa, Hideki Chuman, Hitoshi Ishikawa, Yasuhiro Ikeda, Taiji Sakamoto, Makoto Nakamura

Abstract read
In one paragraph

Article in Orphanet journal of rare diseases, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–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

15 citing papers in PubMed.

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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

10 authors.

Fumio TakanoDivision of Ophthalmology, Department of Surgery, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan.
Kaori UedaDivision of Ophthalmology, Department of Surgery, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan.
Daniel A GodefrooijDepartment of Ophthalmology, University Medical Center Utrecht, Utrecht, The Netherlands.
Akiko YamagamiInoue Eye Hospital, Chiyoda, Tokyo, Japan.
Hiroto IshikawaDepartment of Ophthalmology, Hyogo College of Medicine, Nishinomiya, Japan.
Hideki ChumanDepartment of Ophthalmology, University of Miyazaki, Miyazaki, Japan.
Hitoshi IshikawaDepartment of Ophthalmology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
Yasuhiro IkedaDepartment of Ophthalmology, University of Miyazaki, Miyazaki, Japan.
Taiji SakamotoDepartment of Ophthalmology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
Makoto NakamuraDivision of Ophthalmology, Department of Surgery, Kobe University Graduate School of Medicine, 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan. manakamu@med.kobe-u.ac.jp.ORCID 0000-0002-6464-4302

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLeber hereditary optic neuropathy (LHON) is an acute or subacute optic neuropathy that mainly affects young males. The first nationwide epidemiological survey of LHON was conducted in 2014 in Japan, and LHON was officially designated as a rare intractable disease by the Japanese government in 2015. We conducted a second survey of the annual incidence of LHON in 2019, and estimated the total number of patients with LHON in Japan.

resultsA questionnaire was sent to 997 facilities accredited by the Japanese Ophthalmological Society and/or affiliated with the councilors of the Japanese Neuro-Ophthalmology Society. Responses were received from 791 facilities, with a response rate of 79%. Fifty-five newly diagnosed cases (49 males and 6 females) of LHON were reported from 35 institutions in 2019, with a median age of 28.5 for males and 49.5 years for females. The total number of newly diagnosed cases was calculated as 69 (62 were males and 7 were females, 95% confidence interval 55-83), and the total number of patients was estimated to be 2491 (95% confidence interval: 1996-2986), suggesting a prevalence of LHON in Japan of 1:50,000.

conclusionThe incidence of LHON in 2019 was lower than the estimate in 2014, whereas its prevalence may be similar to that reported in other countries. The accurate estimation of the incidence and prevalence of patients with LHON requires prospective registration.

Indexed as

Optic Atrophy, Hereditary, LeberDNA, MitochondrialFemaleHumansIncidenceJapanMaleMutationProspective StudiesSurveys and QuestionnairesDNA, MitochondrialAnnual incidenceEpidemiologyIntractable diseaseLeber hereditary optic neuropathyMitochondrial DNAPrevalence

Identifiers

PMID35987635
PMCPMC9392235

What OpenQuestion holds

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LicenceCC BY
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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.