Population-Based Observational Study of Adverse Drug Event-Related Mortality in the Super-Aged Society of Japan

Tomoko Funahashi, Toshihiro Koyama (), Hideharu Hagiya, Ko Harada, Syunya Iinuma, Soichiro Ushio, Yoshito Zamami, Takahiro Niimura, Kazuaki Shinomiya, Keisuke Ishizawa, Toshiaki Sendo, Shiro Hinotsu and Mitsunobu R. Kano
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Tomoko Funahashi: Okayama University
Toshihiro Koyama: Okayama University
Hideharu Hagiya: Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
Ko Harada: Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
Syunya Iinuma: Okayama University
Soichiro Ushio: Okayama University Hospital
Yoshito Zamami: Tokushima University Graduate School
Takahiro Niimura: Tokushima University Graduate School
Kazuaki Shinomiya: Tokushima Bunri University
Keisuke Ishizawa: Tokushima University Graduate School
Toshiaki Sendo: Okayama University Hospital
Shiro Hinotsu: Sapporo Medical University
Mitsunobu R. Kano: Okayama University

Drug Safety, 2021, vol. 44, issue 5, No 3, 539 pages

Abstract: Abstract Introduction Adverse drug events (ADEs) are a major cause of mortality. Objective We examined long-term trends for ADE-related deaths in Japan. Methods This observational study was conducted using the Japanese Vital Statistics from 1999 to 2016. Data for all ADE-related deaths were extracted using International Classification of Diseases, Tenth Revision codes. We analysed ADE-related deaths by age and sex and calculated crude and age-standardised mortality rates (ASMR) per 100,000 people. We used Joinpoint regression analysis to identify significant changing points in mortality trends and to estimate annual percentage change (APC). Results In total, 16,417 ADE-related deaths were identified. The crude mortality rate for individuals aged ≥ 65 years was higher than that of young individuals. The ASMR per 100,000 people increased from 0.44 in 1999 to 0.64 in 2016. The crude mortality rate increased from 0.44 in 1999 to 1.01 in 2016. The APC of ASMR increased at a rate of 2.8% (95% confidence interval [CI] 1.4–4.2) throughout the study period. In addition, crude mortality increased at a rate of 5.7% (95% CI 4.2–7.3) annually from 1999 to 2016. The ADE-related mortality rate was higher for men than for women during the study period. Conclusions The number of and trend in ADE-related deaths increased in Japan from 1999 to 2016, particularly in the older population.

Date: 2021
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DOI: 10.1007/s40264-020-01037-9

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