Evidence map›Paper›PMID 38937813›Full record

ArticleBMC musculoskeletal disorders2024

Trends in inpatient orthopedic surgery during the COVID-19 pandemic in Japan: a nationwide data study.

Mitsuhiro Nishizawa, Kosei Nagata, Babapelumi Adejuyigbe, Tomohiro Shinozaki, Koji Yamada

Abstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing 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

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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

6 citing papers in PubMed.

  1. Article
  2. Article
  3. Annual trends in arthroscopic meniscal surgery in Japan: 10-year analysis from 2014 to 2023.Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology · 2026
    Article
  4. Article
  5. Article
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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

5 authors.

Mitsuhiro NishizawaOrthopaedic Trauma Institute, University of California, San Francisco, CA, USA.
Kosei NagataDepartment of Orthopaedic Surgery and Spinal Surgery, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan. knagata-tky@umin.ac.jp.ORCID http://orcid.org/0000-0003-4495-1134
Babapelumi AdejuyigbeDavid Geffen School of Medicineat , The University of California, Los Angeles, CA, USA.
Tomohiro ShinozakiDepartment of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Tokyo, Japan.
Koji YamadaNakanoshima Orthopaedics, 1F, F&F Haimu, 6-26-2, Nakanoshima, Tama-ku, Kawasaki, Kanagawa, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCoronavirus disease 2019 (COVID-19) has resulted in substantial morbidity and mortality globally. The National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) covers 99.9% of health insurance claim receipts by general practitioners. The purpose of this study is to investigate the nationwide number of inpatient orthopedic surgeries in Japan during the effect of state of emergency (SoE) due to COVID-19.

methodThe NDB has been publicly available since 2014. We retrospectively reviewed the NDB from April 2019 to March 2022. We gathered the monthly number of all inpatient orthopedic surgeries. We also classified orthopedic surgeries into the following 11 categories by using K-codes, Japanese original surgery classification: fracture, arthroplasty, spine, arthroscopy, hardware removal, hand, infection/amputation, ligament/tendon, tumor, joint, and others. By using the average number from April to December 2019 as the reference period, we investigated the increase or decrease orthopedic surgeries during the pandemic period.

resultsThe NDB showed that the average number of total inpatient orthopedic surgeries during the reference period was 115,343 per month. In May 2020, monthly inpatient orthopedic surgeries decreased by 29.6% to 81,169 surgeries, accounting for 70.3% of the reference period. The second SoE in 2021 saw no change, while the third and fourth SoEs showed slight decreases compared to the reference period. Hardware removal and tumor surgeries in May 2020 decreased to 45.3% and 45.5%, respectively, while fracture surgeries had relatively small decreases.

conclusionAccording to NDB, approximately 1.3 million orthopedic inpatient surgeries were performed or claimed in a year in Japan. In May 2020, the first SoE period of the COVID-19 pandemic, the number of inpatient orthopedic surgeries in Japan decreased by 30%. Meanwhile, the decrease was relatively small during the SoE periods in 2021.

Indexed as

COVID-19Orthopedic ProceduresDatabases, FactualHospitalizationHumansInpatientsJapanPandemicsRetrospective StudiesSARS-CoV-2COVID-19National Database of Health Insurance Claims and Specific Health Checkups of JapanOrthopedic surgeryStatement of Emergency

Identifiers

PMID38937813
PMCPMC11212153

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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.