Evidence map›Paper›PMID 32973068›Full record

ArticleBMJ open2020

Nationwide incidence of central retinal artery occlusion in Japan: an exploratory descriptive study using the National Database of Health Insurance Claims (2011-2015).

Ai Kido, Hiroshi Tamura, Hanako Ohashi Ikeda, Masahiro Miyake, Shusuke Hiragi, Akitaka Tsujikawa

Abstract read
In one paragraph

Article in BMJ open, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 pooled it
–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

30 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Interventions for acute non-arteritic central retinal artery occlusion.The Cochrane database of systematic reviews · 2023
    Pooled it
  2. Pooled it
  3. Nationwide epidemiology of retinitis pigmentosa in Japan, 2011-2020: a population-based cohort study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Article
  4. Review
  5. Article
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  7. Article
  8. Article
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  10. Article
  11. Antithrombotic use in retinal artery occlusion: A narrative review.The Kaohsiung journal of medical sciences · 2025
    Review
  12. Ankle-Brachial Index as a Predictor of Acute Ischemic Cerebrovascular Event After Central Retinal Artery Occlusion.Medical science monitor : international medical journal of experimental and clinical research · 2025
    Article
  13. Review
  14. Review
  15. National trends in hospitalizations for gastrointestinal bleeding in Japan.Journal of clinical biochemistry and nutrition · 2024
    Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Progress in central retinal artery occlusion: a narrative review.The Journal of international medical research · 2023
    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

6 authors.

Ai Kido *Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.ORCID 0000-0001-7769-0917
Hiroshi Tamura *Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.ORCID 0000-0002-7740-2732
Hanako Ohashi IkedaDepartment of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan hanakoi@kuhp.kyoto-u.ac.jp.ORCID 0000-0001-9572-8659
Masahiro MiyakeDepartment of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.ORCID 0000-0001-7410-3764
Shusuke HiragiDivision of Medical Information Technology and Administration Planning, Kyoto University Hospital, Kyoto, Japan.ORCID 0000-0003-1629-6195
Akitaka TsujikawaDepartment of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.ORCID 0000-0003-0779-7799

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsThe latest evidence in the incidence of central retinal artery occlusion (CRAO) is needed to support the development of novel treatments as orphan drugs. However, up-to-date information on the incidence of CRAO in the ageing or aged population is limited. We aimed to investigate the nationwide epidemiological and clinical characteristics of CRAO in Japan, using nationwide health insurance claims data.

methodsWe analysed a total of 16 069 762 claims data in the sampling dataset of the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB), which is the nationwide health insurance claims database of 127 million whole Japanese individuals. CRAO was identified using the International Classification of Diseases 10th edition diagnostic code H34.1. The crude incidence rates and age-standardised incidence rates of CRAO, according to the standard age-structure population of the WHO, were calculated.

resultsThe crude incidence rate of CRAO in Japan was 5.84 (95% CI, 5.71 to 5.97) per 100 000 person-years. With respect to the sex-related incidence, the rate was higher 1.40 times in men than in women (6.85 (95% CI, 6.65 to 7.06) vs 4.88 (95% CI, 4.71 to 5.05), p<0.001). The age-standardised incidence rate was 2.53 (95% CI, 2.29 to 2.76) per 100 000 person-years.

conclusionsThe crude incidence rate of CRAO was higher in Japan than in other countries, as reported previously, reflecting the Japanese population structure as a super-aged society. These findings can be helpful for the development of appropriate healthcare policies to address the increasing incidence of CRAO with the ageing population.

Indexed as

Retinal Artery OcclusionAgedDatabases, FactualFemaleHumansIncidenceInsurance, HealthJapanMaleepidemiologyophthalmologypublic healthvetreoretinal

Identifiers

PMID32973068
PMCPMC7517576

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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.