Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.

<h4>Background</h4>The definition of incident type 2 diabetes varies across studies; hence, the actual incidence of type 2 diabetes in Japan is unclear. Here, we reviewed the various definitions of incident type 2 diabetes used in previous epidemiologic studies and estimated the diabetes...

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Autores principales:	Atsushi Goto, Maki Goto, Mitsuhiko Noda, Shoichiro Tsugane
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f258384a12a2484fab35a663bd80bb03
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spelling	oai:doaj.org-article:f258384a12a2484fab35a663bd80bb032021-11-18T08:56:27ZIncidence of type 2 diabetes in Japan: a systematic review and meta-analysis.1932-620310.1371/journal.pone.0074699https://doaj.org/article/f258384a12a2484fab35a663bd80bb032013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24040326/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The definition of incident type 2 diabetes varies across studies; hence, the actual incidence of type 2 diabetes in Japan is unclear. Here, we reviewed the various definitions of incident type 2 diabetes used in previous epidemiologic studies and estimated the diabetes incidence rate in Japan.<h4>Methods</h4>We searched for related literature in the MEDLINE, EMBASE, and Ichushi databases through September 2012. Two reviewers selected studies that evaluated incident type 2 diabetes in the Japanese population.<h4>Results</h4>From 1824 relevant articles, we included 33 studies with 386,803 participants. The follow-up period ranged from 2.3 to 14 years and the studies were initiated between 1980 and 2003. The random-effects model indicated that the pooled incidence rate of diabetes was 8.8 (95% confidence interval, 7.4-10.4) per 1000 person-years. We observed a high degree of heterogeneity in the results (I(2) = 99.2%; p < 0.001), with incidence rates ranging from 2.3 to 52.6 per 1000 person-years. Three studies based their definition of incident type 2 diabetes on self-reports only, 10 on laboratory data only, and 20 on self-reports and laboratory data. Compared with studies defining diabetes using laboratory data (n = 30; pooled incidence rate = 9.6; 95% confidence interval = 8.3-11.1), studies based on self-reports alone tended to show a lower incidence rate (n = 3; pooled incidence rate = 4.0; 95% confidence interval = 3.2-5.0; p for interaction < 0.001). However, stratified analyses could not entirely explain the heterogeneity in the results.<h4>Conclusions</h4>Our systematic review and meta-analysis indicated the presence of a high degree of heterogeneity, which suggests that there is a considerable amount of uncertainty regarding the incidence of type 2 diabetes in Japan. They also suggested that laboratory data may be important for the accurate estimation of the incidence of type 2 diabetes.Atsushi GotoMaki GotoMitsuhiko NodaShoichiro TsuganePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 9, p e74699 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Atsushi Goto Maki Goto Mitsuhiko Noda Shoichiro Tsugane Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
description	<h4>Background</h4>The definition of incident type 2 diabetes varies across studies; hence, the actual incidence of type 2 diabetes in Japan is unclear. Here, we reviewed the various definitions of incident type 2 diabetes used in previous epidemiologic studies and estimated the diabetes incidence rate in Japan.<h4>Methods</h4>We searched for related literature in the MEDLINE, EMBASE, and Ichushi databases through September 2012. Two reviewers selected studies that evaluated incident type 2 diabetes in the Japanese population.<h4>Results</h4>From 1824 relevant articles, we included 33 studies with 386,803 participants. The follow-up period ranged from 2.3 to 14 years and the studies were initiated between 1980 and 2003. The random-effects model indicated that the pooled incidence rate of diabetes was 8.8 (95% confidence interval, 7.4-10.4) per 1000 person-years. We observed a high degree of heterogeneity in the results (I(2) = 99.2%; p < 0.001), with incidence rates ranging from 2.3 to 52.6 per 1000 person-years. Three studies based their definition of incident type 2 diabetes on self-reports only, 10 on laboratory data only, and 20 on self-reports and laboratory data. Compared with studies defining diabetes using laboratory data (n = 30; pooled incidence rate = 9.6; 95% confidence interval = 8.3-11.1), studies based on self-reports alone tended to show a lower incidence rate (n = 3; pooled incidence rate = 4.0; 95% confidence interval = 3.2-5.0; p for interaction < 0.001). However, stratified analyses could not entirely explain the heterogeneity in the results.<h4>Conclusions</h4>Our systematic review and meta-analysis indicated the presence of a high degree of heterogeneity, which suggests that there is a considerable amount of uncertainty regarding the incidence of type 2 diabetes in Japan. They also suggested that laboratory data may be important for the accurate estimation of the incidence of type 2 diabetes.
format	article
author	Atsushi Goto Maki Goto Mitsuhiko Noda Shoichiro Tsugane
author_facet	Atsushi Goto Maki Goto Mitsuhiko Noda Shoichiro Tsugane
author_sort	Atsushi Goto
title	Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
title_short	Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
title_full	Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
title_fullStr	Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
title_full_unstemmed	Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.
title_sort	incidence of type 2 diabetes in japan: a systematic review and meta-analysis.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/f258384a12a2484fab35a663bd80bb03
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Incidence of type 2 diabetes in Japan: a systematic review and meta-analysis.

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