Le Duc-Cuong, Pham Truong-Minh, Quy Pham Nguyen, Hamanishi Junzo, Le Thi Thu Huong, Crocker Alysha, Bu Jingyu, Kubo Tatsuhiko
Faculty of Public Health, Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam.
Surveillance and Reporting, Cancer Advanced Analytics, Cancer Research and Analytics, Cancer Care Alberta, Alberta Health Services, Edmonton and Calgary, Alberta, Canada.
J Obstet Gynaecol Res. 2025 May;51(5):e16327. doi: 10.1111/jog.16327.
Using the national Japanese mortality data, we investigated whether there has been an improvement in the lifespan among Japanese women who died from cervical and ovarian cancers from the years 2000 through 2020.
The number of deaths due to cervical and ovarian cancers in Japan was obtained from the World Health Organization mortality database. We calculated age standardized rates (ASR) using the direct method adjusted to the World Standard Population. Years of life lost (YLL) due to those cancers were calculated using Japanese life tables. Average lifespan shortened (ALSS) measure was calculated as a ratio of YLL to the expected lifespan. We used the bootstrap method to calculate the 95% confidence interval (95% CI) for the ALSS measure.
The ASR for death remained mostly stable over the study at about two deaths per 100 000 women for cervical cancer, and three deaths for ovarian cancer. The ALSS values report that women who died from cervical cancer lost on average 28.3% of their lifespan (95% CI: 27.7-28.9) in 2000 and 26.6% (26.1-27.2) in 2020. Women who died from ovarian cancer lost on average 26.9% (26.5-27.4) and 23.5% (23.1-23.9) of their lifespan in 2000 and 2020, respectively.
The ALSS results show that over a 20-year period, women who died of cervical and ovary cancers in Japan had their lifespans prolonged by about two and three percentage points, respectively.
利用日本全国死亡率数据，我们调查了2000年至2020年期间死于宫颈癌和卵巢癌的日本女性的寿命是否有所改善。
日本宫颈癌和卵巢癌死亡人数来自世界卫生组织死亡率数据库。我们使用根据世界标准人口调整的直接法计算年龄标准化率（ASR）。使用日本生命表计算这些癌症导致的寿命损失年数（YLL）。平均寿命缩短（ALSS）指标计算为YLL与预期寿命的比值。我们使用自助法计算ALSS指标的95%置信区间（95%CI）。
在研究期间，宫颈癌的死亡ASR大多保持稳定，约为每10万名女性中有2例死亡，卵巢癌为3例死亡。ALSS值表明，死于宫颈癌的女性在2000年平均损失其寿命的28.3%（95%CI：27.7-28.9），在2020年为26.6%（26.1-27.2）。死于卵巢癌的女性在2000年和2020年分别平均损失其寿命的26.9%（26.5-27.4）和23.5%（23.1-23.9）。
ALSS结果表明，在20年的时间里，日本死于宫颈癌和卵巢癌的女性的寿命分别延长了约2个和3个百分点。
