A rapid literature search strategy was conducted for all English language literature published before July 2017. The search was conducted using the electronic databases PubMed, Scopus and Web of Science. The search strategy included the keywords 'colorectal cancer', 'epidemiology', 'incidence', 'mortality', 'risk factor', and 'world'. In 2012, the highest CRC incidence rates were observed in the Republic of Korea, Slovakia and Hungary while the lowest incidence rates were seen in Singapore, Serbia and Japan. The highest CRC mortality rates in both sexes were seen in Central and Eastern Europe and the lowest mortality rates were found in Middle Division of Africa. The main risk factors for CRC include nutritional factors, past medical history, smoking, socioeconomic status, and family medical history. According to the increasing trend of CRC incidence and mortality in the world, implementation of prevention programs such as screening programs, diet modification, and healthy lifestyle education is necessary.
Bladder cancer (BC) is the sixth most common cancer in the world. An increase in the incidence and recurrence of BC has led to massive pressure on health care systems. Studies have shown that the geographical and ethical distributions of BC are variable in different parts of the world. However, most studies have focused more on clinical challenges and treatment strategies in BC management. Due to the limited number of studies conducted on the incidence rate, mortality and risk factors of BC worldwide, it is necessary to carry out studies in these areas. Therefore, the aim of this study was to determine the global incidence rate, mortality rate and risk factors for BC.
One of the main challenges of the 21st century is tobacco consumption, and in particular cigarette smoking (Control and Prevention, 2012). Cigarette smoking is a leading cause of death worldwide (Control and Prevention, 2011).About 1 billion people around the world (800 million men and 200 million women) are addicted to cigarette (WHO, 2015). The prevalence of smoking varies across different parts of the world; this variation is due to economic development and income levels. More than 80% of adult male smokers and half of adult female smokers live in low or middle-income countries (Ng et al., 2014).Tobacco use kills more than 7 million people every year worldwide, and nearly 80% of these deaths occur in low-income countries (WHO, 2017). It is estimated that this figure will increase in 2030 (WHO, 2011). Tobacco use caused 100 million deaths in the 20th worldwide, if this trend continues, this figure will reach 1 billion by the end of the 21st century (Thun et al., 2013). Peer Review Details Peer review method: NO Peer-review policy Plagiarism software screening?: Yes Date of Original Submission: 7 September 2017 Date accepted: 13 September 2017 Peer reviewers approved by: Dr. Lili Hami Editor who approved publication: Dr. Phuc Van Pham
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