Surveillance and Reporting, Cancer Research and Analytics, Cancer Control Alberta, Alberta Health Services, Edmonton, Alberta, Canada.
Department of Therapeutic Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Ann Epidemiol. 2020 Jul;47:19-24. doi: 10.1016/j.annepidem.2020.05.012. Epub 2020 Jun 3.
Premature mortality offers an alternative approach for monitoring the burden of mortality; however, little is known about its measures for stomach cancer. In the present study, we investigated temporal changes in premature mortality because of stomach cancer in the Japanese population from 1980 to 2015.
Mortality data for stomach cancer were obtained from the World Health Organization mortality database. Years of life lost (YLL) was calculated using Japanese life tables. The average lifespan shortened was calculated and defined as the ratio of YLL in relation to the expected lifespan.
Over a 35-year time frame, the age-standardized rates adjusted to the World Standard Population for deaths from stomach cancer substantially decreased in both sexes. The results from the average YLL (AYLL) measure showed that lifespan of stomach cancer patients was prolonged by about 3 and 5 years in men and women, respectively. The average lifespan shortened measure showed that stomach cancer led to a loss of 18.5% of lifespan among men and of 21.9% among women in 1980, but these numbers were reduced to 13.6% and 14.5%, respectively, in 2015.
Our study demonstrated decreasing trends in premature mortality for stomach cancer in Japan over a 35-year period.
过早死亡率为监测死亡率负担提供了一种替代方法；然而，人们对其胃癌死亡率的衡量指标知之甚少。本研究调查了 1980 年至 2015 年日本人群因胃癌导致的过早死亡率的时间变化。
胃癌死亡率数据来自世界卫生组织死亡率数据库。使用日本生命表计算生命损失年数 (YLL)。计算平均预期寿命缩短的数值，并将其定义为 YLL 与预期寿命的比值。
在 35 年的时间框架内，两性的胃癌死亡年龄标准化率调整至世界标准人口后大幅下降。从平均 YLL（AYLL）衡量标准来看，男性和女性的胃癌患者的预期寿命分别延长了约 3 年和 5 年。平均预期寿命缩短衡量标准显示，1980 年胃癌导致男性寿命缩短 18.5%，女性寿命缩短 21.9%，但到 2015 年，这一数字分别降至 13.6%和 14.5%。
本研究表明，在 35 年期间，日本因胃癌导致的过早死亡率呈下降趋势。
