Regional clinical practice variation in urology: Usage example of the Open Data of the National Database of Health Insurance Claims and Specific Health Checkups of Japan

Sugihara, Toru; Yasunaga, Hideo; Matsui, Hiroki; Kamei, Jun; Fujimura, Tetsuya; Kume, Haruki

doi:10.1111/iju.13840

Cited by 16 publications

(13 citation statements)

References 3 publications

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“…Ideally, we would have validated the CRAO diagnosis by the medical records and then performed the research with high diagnostic accuracy. Second, a small portion of cases, under 5% of all insured healthcare services of Japan, are not included in the NDB database, 12 which may lead to an underestimation of the actual incidence of CRAO. Third, because a hashed personal identification number was provided only in the outpatient data, we could not exclude any potential preexisting cases of CRAO nor eliminate the overlap between outpatient and inpatient data, although we considered it in the calculation of incidence (online supplemental methods).…”

Section: Discussionmentioning

confidence: 99%

“…11 The National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) developed by the Japanese Ministry of Health, Labor and Welfare (MHLW) contains entire healthcare insurance claims data of almost all (≥95%) medical treatments in Japan. 12 After 2011, more than 1.7 billion records from 127 million individuals are registered annually into the NDB. 13 14 Strengths and limitations of this study ► The current study is the first nationwide, populationbased epidemiological study of central retinal artery occlusion (CRAO) in an ageing or aged society.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…The data are made available for academic use through several options and have led to several significant reports. 11,12 The features of the offering options are briefly summarized in Supplemental Table 1.…”

Section: Databasementioning

confidence: 99%

Incidence and Clinical Practice of Exudative Age-related Macular Degeneration

Kido

Miyake

Tamura

et al. 2022

Ophthalmology Science

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“… 2 9 10 To understand the pathogenesis and ethnic differences of CSC, more epidemiological fundamental information needs to be reported. Herein, under the permission of the Japan Ministry of Health, Labour and Welfare (MHLW), we accessed and analysed all data stored in the National Database of Health Insurance Claims and Specific Health Check-ups of Japan (NDB, 11 12 covering more than 95% of the claims issued in Japan 13 ) managed by the MHLW to evaluate the epidemiological background of CSC.…”

Section: Introductionmentioning

confidence: 99%

Incidence of central serous chorioretinopathy (2011–2018): a nationwide population-based cohort study of Japan

et al. 2021

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AimsThe aim of this study was to elucidate the epidemiological background of central serous chorioretinopathy (CSC), including its incidence and treatment pattern.MethodsThis was a population-based longitudinal cohort study using a nationwide health insurance claims database of the Japan Ministry of Health, Labour and Welfare (MHLW). As Japan employs universal health coverage, the database covers more than 95% of claims issued in Japan. We accessed all data stored in the database with permission from the MHLW. We traced all individuals aged 30 years or older and identified individuals with new onset of CSC between January 2011 and December 2018. CSC cases were categorised by age and sex for each year, and incidence rate was calculated. We also identified major treatments for CSC to elucidate the initial treatment pattern.ResultsDuring the 8-year period, 247 930 incidences of CSC were identified, among which 75.9% were men. The crude incidence rate (per 100 000 person-years) in the general population aged 30 years or older was 34.0 (95% CI 33.9 to 34.2), in men was 54.2 (95% CI 53.9 to 54.4) and in women was 15.7 (95% CI 15.5 to 15.8). The mean age of onset was lower in men than in women (50.5±12.5 years vs 54.7±13.5 years). Most of the patients with newly diagnosed CSC (86.8%) did not receive major treatment.ConclusionsThe current study provides the nationwide population-based evidence to clarify the detailed epidemiology of CSC. These results could help to understand the pathogenesis and mechanisms of CSC in the future.

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Regional clinical practice variation in urology: Usage example of the Open Data of the National Database of Health Insurance Claims and Specific Health Checkups of Japan

Cited by 16 publications

References 3 publications

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

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

Incidence and Clinical Practice of Exudative Age-related Macular Degeneration

Incidence of central serous chorioretinopathy (2011–2018): a nationwide population-based cohort study of Japan

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