Nine-Year Incidence and Risk Factors for Age-Related Macular Degeneration in a Defined Japanese Population. The Hisayama Study

Miho Yasuda, Yutaka Kiyohara, Yasuaki Hata, Satoshi Arakawa, Koji Yonemoto, Yasufumi Doi, Mitsuo Iida, Tatsuro Ishibashi

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Purpose: To estimate the 9-year incidence and risk factors for age-related macular degeneration (AMD) in a general Japanese population. Design: Population-based, cohort study. Participants: In 1998, a total of 1775 Hisayama residents aged ≥40 years underwent a baseline eye examination. Of those, 1401 subjects (78.9%) took part in the follow-up eye examination in 2007 and were enrolled in the present study. Methods: At both time points, the characteristics of AMD were determined by grading color fundus photographs using the Wisconsin Age-Related Maculopathy Grading System. Main Outcome Measures: Incident early and late AMD. Results: The age-standardized, 9-year cumulative incidence of early AMD was 10.0%, and that of late AMD was 1.4%. Men were found to have a significantly higher incidence of late AMD than women (age-adjusted odds ratio [OR], 2.97; 95% confidence interval [CI], 1.25-7.09). The incidence of both early and late AMD increased significantly with age. Multiple logistic regression analysis showed that older age (per 1 year; OR, 1.10; 95% CI, 1.05-1.16), smoking habits (OR, 3.98; 95% CI, 1.07-14.7), and higher circulating white blood cell (WBC) count (per 1000 cells/mm3) (OR, 1.38; 95% CI, 1.07-1.79) were significantly associated with the development of late AMD. Conclusions: Our findings suggest that the 9-year incidences of late AMD are lower among the Japanese than among white people in Western countries, and it is higher than among black people. Smoking habits and higher circulating WBC count are significant risk factors for the development of late AMD in the Japanese. Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.

Original languageEnglish
Pages (from-to)2135-2140
Number of pages6
JournalOphthalmology
Volume116
Issue number11
DOIs
Publication statusPublished - Nov 1 2009

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Macular Degeneration
Incidence
Population
Odds Ratio
Confidence Intervals
Leukocyte Count
Habits
Smoking
Disclosure
Cohort Studies
Color
Logistic Models
Regression Analysis
Outcome Assessment (Health Care)

All Science Journal Classification (ASJC) codes

  • Ophthalmology

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Nine-Year Incidence and Risk Factors for Age-Related Macular Degeneration in a Defined Japanese Population. The Hisayama Study. / Yasuda, Miho; Kiyohara, Yutaka; Hata, Yasuaki; Arakawa, Satoshi; Yonemoto, Koji; Doi, Yasufumi; Iida, Mitsuo; Ishibashi, Tatsuro.

In: Ophthalmology, Vol. 116, No. 11, 01.11.2009, p. 2135-2140.

Research output: Contribution to journalArticle

Yasuda, Miho ; Kiyohara, Yutaka ; Hata, Yasuaki ; Arakawa, Satoshi ; Yonemoto, Koji ; Doi, Yasufumi ; Iida, Mitsuo ; Ishibashi, Tatsuro. / Nine-Year Incidence and Risk Factors for Age-Related Macular Degeneration in a Defined Japanese Population. The Hisayama Study. In: Ophthalmology. 2009 ; Vol. 116, No. 11. pp. 2135-2140.
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abstract = "Purpose: To estimate the 9-year incidence and risk factors for age-related macular degeneration (AMD) in a general Japanese population. Design: Population-based, cohort study. Participants: In 1998, a total of 1775 Hisayama residents aged ≥40 years underwent a baseline eye examination. Of those, 1401 subjects (78.9{\%}) took part in the follow-up eye examination in 2007 and were enrolled in the present study. Methods: At both time points, the characteristics of AMD were determined by grading color fundus photographs using the Wisconsin Age-Related Maculopathy Grading System. Main Outcome Measures: Incident early and late AMD. Results: The age-standardized, 9-year cumulative incidence of early AMD was 10.0{\%}, and that of late AMD was 1.4{\%}. Men were found to have a significantly higher incidence of late AMD than women (age-adjusted odds ratio [OR], 2.97; 95{\%} confidence interval [CI], 1.25-7.09). The incidence of both early and late AMD increased significantly with age. Multiple logistic regression analysis showed that older age (per 1 year; OR, 1.10; 95{\%} CI, 1.05-1.16), smoking habits (OR, 3.98; 95{\%} CI, 1.07-14.7), and higher circulating white blood cell (WBC) count (per 1000 cells/mm3) (OR, 1.38; 95{\%} CI, 1.07-1.79) were significantly associated with the development of late AMD. Conclusions: Our findings suggest that the 9-year incidences of late AMD are lower among the Japanese than among white people in Western countries, and it is higher than among black people. Smoking habits and higher circulating WBC count are significant risk factors for the development of late AMD in the Japanese. Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.",
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T1 - Nine-Year Incidence and Risk Factors for Age-Related Macular Degeneration in a Defined Japanese Population. The Hisayama Study

AU - Yasuda, Miho

AU - Kiyohara, Yutaka

AU - Hata, Yasuaki

AU - Arakawa, Satoshi

AU - Yonemoto, Koji

AU - Doi, Yasufumi

AU - Iida, Mitsuo

AU - Ishibashi, Tatsuro

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N2 - Purpose: To estimate the 9-year incidence and risk factors for age-related macular degeneration (AMD) in a general Japanese population. Design: Population-based, cohort study. Participants: In 1998, a total of 1775 Hisayama residents aged ≥40 years underwent a baseline eye examination. Of those, 1401 subjects (78.9%) took part in the follow-up eye examination in 2007 and were enrolled in the present study. Methods: At both time points, the characteristics of AMD were determined by grading color fundus photographs using the Wisconsin Age-Related Maculopathy Grading System. Main Outcome Measures: Incident early and late AMD. Results: The age-standardized, 9-year cumulative incidence of early AMD was 10.0%, and that of late AMD was 1.4%. Men were found to have a significantly higher incidence of late AMD than women (age-adjusted odds ratio [OR], 2.97; 95% confidence interval [CI], 1.25-7.09). The incidence of both early and late AMD increased significantly with age. Multiple logistic regression analysis showed that older age (per 1 year; OR, 1.10; 95% CI, 1.05-1.16), smoking habits (OR, 3.98; 95% CI, 1.07-14.7), and higher circulating white blood cell (WBC) count (per 1000 cells/mm3) (OR, 1.38; 95% CI, 1.07-1.79) were significantly associated with the development of late AMD. Conclusions: Our findings suggest that the 9-year incidences of late AMD are lower among the Japanese than among white people in Western countries, and it is higher than among black people. Smoking habits and higher circulating WBC count are significant risk factors for the development of late AMD in the Japanese. Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.

AB - Purpose: To estimate the 9-year incidence and risk factors for age-related macular degeneration (AMD) in a general Japanese population. Design: Population-based, cohort study. Participants: In 1998, a total of 1775 Hisayama residents aged ≥40 years underwent a baseline eye examination. Of those, 1401 subjects (78.9%) took part in the follow-up eye examination in 2007 and were enrolled in the present study. Methods: At both time points, the characteristics of AMD were determined by grading color fundus photographs using the Wisconsin Age-Related Maculopathy Grading System. Main Outcome Measures: Incident early and late AMD. Results: The age-standardized, 9-year cumulative incidence of early AMD was 10.0%, and that of late AMD was 1.4%. Men were found to have a significantly higher incidence of late AMD than women (age-adjusted odds ratio [OR], 2.97; 95% confidence interval [CI], 1.25-7.09). The incidence of both early and late AMD increased significantly with age. Multiple logistic regression analysis showed that older age (per 1 year; OR, 1.10; 95% CI, 1.05-1.16), smoking habits (OR, 3.98; 95% CI, 1.07-14.7), and higher circulating white blood cell (WBC) count (per 1000 cells/mm3) (OR, 1.38; 95% CI, 1.07-1.79) were significantly associated with the development of late AMD. Conclusions: Our findings suggest that the 9-year incidences of late AMD are lower among the Japanese than among white people in Western countries, and it is higher than among black people. Smoking habits and higher circulating WBC count are significant risk factors for the development of late AMD in the Japanese. Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.

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