Abstract
ObjectiveCompare the urban-rural disparity in cancer mortality and changing trend during the past 18 years in Tianjin, China.MethodsCancer death data were obtained from Tianjin All Cause of Death Registration System (CDRS), which covers the whole population of Tianjin. We calculated and compared the constituent ratio of cancer deaths, age-standardized mortality rate(ASR)and changing trends between urban and rural areas.ResultsFrom 1999 to 2016, a total of 245,744 cancer deaths were reported, accounting 21.7% of all deaths in Tianjin. The ASR of total cancer mortality was higher in urban areas than in rural areas. A total of 33,739 persons were avoided dying of cancers in rural area compared to the urban death level from 1999 to 2016, which was 40.1% compare to the current level of rural areas. But the gap between urban and rural areas became narrowed gradually. The urban-rural ratios (urban/rural) of total cancer mortality changed from 1.76 (125.7/71.5)[95%CI,1.67,1.84] in 1999 to 1.11 (99.6/90.0)[95%CI,1.06,1.15] in 2016. The ASR of lung, liver and esophagus cancer became higher in rural areas than in urban areas in 2016.ConclusionCancer transition was obviously occurred in Tianjin and showed different speeds and big gap between urban and rural areas. Much more attention was needed to pay in rural areas which still have increasing trends in most cancers mortality recently.
Highlights
According to the estimate from the World Health Organization (WHO) in 2015, cancer is the first or second leading cause of death before 70 years old in 91 of 172 countries [1]
A total of 33,739 persons were avoided dying from cancers in rural area compare to the urban death level from 1999 to 2016, which was 40.1% compare to the current level of rural areas
The results in our study showed that the cancer prevalent pattern in 2016 was more closed to high developed countries than that in 1999
Summary
According to the estimate from the World Health Organization (WHO) in 2015, cancer is the first or second leading cause of death before 70 years old in 91 of 172 countries [1]. In China, cancer became the leading cause of death since 2010 and an important issue affect public health [2]. Human development and urbanization have a closed affect on cancer’s incidence and mortality. Cancers of the female breast, lung, colorectum, and prostate are the most common leading causes of cancer death in more developed countries, liver, stomach and esophagus cancer among males and cervical cancer among females are more popular in less developed countries [3, 4]. The ongoing displacement of infection-related and poverty-related cancers by those cancers that are already highly frequent in the most developed countries were observed in several studies at the country levels [4,5,6,7], but merely at city levels.
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