Time trends of stomach cancer survival: a systematic review of survival rates from population-based cancer registration.

Aim Population-based survival is important and useful to design public health projects and evaluate the efficacy of stomach cancer control and prevention. We aimed to describe the pattern and time trends of stomach cancer survival worldwide from the population-based cancer registration. Methods A systematic search of PubMed, Web of Science, EMBASE, SEER and SinoMed was conducted before December 31, 2020. All eligible survival analyses of stomach cancer were collected and evaluated by countries or regions, periods, gender and age groups. Results Our review included 76 articles about stomach cancer survival, and found out that the survival rates improved globally with time, although the increase wasn't remarkable. In which, the highest 5-year observed survival rate was occurred in Japan (2004-2007) with 72.1%. For the 5-year relative/net survival rates, ranks were relatively high in Korea and Japan, while fairly poor in Africa and India. The sex-specific survival rates were higher in women than in men in America, Europe and Oceania, whereas inversely in Asia. The poorest age-specific 5-year relative/net survival rates were observed in patients older than 75. Conclusions Over the past decades, the prognosis of stomach cancer has gradually improved worldwide, and the survival rates in developed regions were higher than those in developing regions. White males and Asian females had a poorer survival than white females and Asian males. Younger patients had experienced better survival than patients older than 75 years old globally. This article is protected by copyright. All rights reserved.