Evidence map›Paper›PMID 37652585›Full record

ArticleBMJ open2023

Impact of the COVID-19 pandemic on mortality trends in Japan: a reversal in 2021? A descriptive analysis of national mortality data, 1995-2021.

Hirokazu Tanaka, Kayo Togawa, Kota Katanoda

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
5.1field-weighted citation impact, top 4% 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, 22 citations in OpenAlex.

  1. Observational
  2. Reassessing Early COVID-19 Strategies in East Asia: Insights From Japan and Korea.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2026
    Review
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  8. Excess Deaths in Korea During the COVID-19 Pandemic: 2020-2022.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2024
    Article
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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

3 authors.

Hirokazu TanakaDivision of Population Data Science, National Cancer Center Institute for Cancer Control, Chuo-ku, Tokyo, Japan hitanak@ncc.go.jp.ORCID 0000-0002-3153-8802
Kayo TogawaDivision of Population Data Science, National Cancer Center Institute for Cancer Control, Chuo-ku, Tokyo, Japan.
Kota KatanodaDivision of Population Data Science, National Cancer Center Institute for Cancer Control, Chuo-ku, Tokyo, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe COVID-19 pandemic led to an increase in mortality in most countries in 2020, deviating from prior decreasing trends. In Japan, however, mortality was suggested to decrease in 2020. This study investigated long-term mortality trends and cause-specific contributions, focusing on the period of the COVID-19 pandemic in Japan.

designWe analysed Japanese age-standardised mortality rates (ASMRs) from 1995 to 2021 using vital statistics.

main outcome measuresThe cause-specific annual ASMR changes were calculated in comparison with the previous year over the abovementioned period.

resultsThere was a general downward trend in overall ASMR for both sexes until 2020 followed by a small increase in 2021. In men, the all-cause ASMR (per 100 000 persons) decreased from 1352.3 to 1328.8 in 2020 (-1.74% from 2019), and increased to 1356.3 in 2021 in men (+2.07% from 2020). In women, the all-cause ASMR decreased from 746.0 to 722.1 in 2020 (-3.20% from 2019), and increased to 737.9 (+2.19% from 2020) in 2021. ASMRs from malignant neoplasms, pneumonia, accidents and suicide (men only) continued to decrease during the COVID-19 pandemic while the trend of cardiovascular mortality increased in 2021. Analysis of ASMR changes revealed that COVID-19, senility, cardiovascular disease and 'other causes not classified as major causes' contributed to the all-cause mortality increase in 2021.

conclusionsIn Japan, the decreasing trend in overall mortality continued in 2020 despite the COVID-19 pandemic. However, approximately 2% mortality increase was observed in 2021, which was attributable to COVID-19, senility, cardiovascular disease and 'other causes'. The year 2021 was a turning point of mortality trends in Japan, although continued monitoring is warranted.

Indexed as

Cardiovascular DiseasesCOVID-19FemaleHumansJapanMalePandemicsSexual BehaviorCOVID-19DemographyEpidemiologyPublic health

Identifiers

PMID37652585
PMCPMC10476106
OpenAlexW4386334082

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.