Weibing Wang1, Wenbin Chen1, Jianjiang Lin1, Qinsong Shen1, Xile Zhou1, Caizhao Lin2. 1. Department of Colorectal and Anal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79, Qingchun road, 310003 Hangzhou, Zhejiang, PR China. 2. Department of Colorectal and Anal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, 79, Qingchun road, 310003 Hangzhou, Zhejiang, PR China. Electronic address: incz@medsub.cn.
Abstract
BACKGROUND: The incidence of colorectal cancer (CRC) has significantly increased in adults < 50 years old who are below the screening age. OBJECTIVES: The primary objective was to evaluate the age-standardized incidence (ASI) of young-onset CRC from 1988 to 2013. The secondary objective was to assess factors associated with cancer-specific death (CSD). METHODS: We accessed data of 64,854 CRC patients (20-49 years old) from the United States Surveillance, Epidemiology, and End Results Program (SEER) database. RESULTS: A gradual increase in the ASI of CRC in the study population was found: from 3.59/100,000 males in 1988 to 5.21/100,000 males in 2013, and from 3.15/100,000 females in 1988 to 4.45/100,000 females in 2013. ASI adjusted by race revealed a relatively pronounced increase in the white population compared to African American and other races, with an increase from 3.07/100,000 persons in 1988 to 4.79/100,000 persons in 2013. Males had a 19% higher likelihood of CRC-related death compared to females [hazard ratio (HR) = 1.19, 95% confidence interval (CI): 1.16-1.23], and African American had a 1.34-fold higher likelihood of CRC-related death compared to whites (95% CI: 1.28-1.39). CRC-related death was significantly higher in patients with signet ring-cell histology (HR = 1.56, 95% CI: 1.45-1.68), compared to patients with adenocarcinoma. Male gender, and advanced stage predicted a higher likelihood of CRC-related death in African Americans compared to the whole population. Signet ring-cell histology, advanced stage, and advanced grade were significantly associated with CRC-related death in African-American patients. CONCLUSION: This study corroborates emerging data that the (ASI) of young-onset CRC is increasing. It also identified factors associated with cancer-specific death in this population that may aid in targeting screening strategies for adults < 50 years old.
BACKGROUND: The incidence of colorectal cancer (CRC) has significantly increased in adults < 50 years old who are below the screening age. OBJECTIVES: The primary objective was to evaluate the age-standardized incidence (ASI) of young-onset CRC from 1988 to 2013. The secondary objective was to assess factors associated with cancer-specific death (CSD). METHODS: We accessed data of 64,854 CRC patients (20-49 years old) from the United States Surveillance, Epidemiology, and End Results Program (SEER) database. RESULTS: A gradual increase in the ASI of CRC in the study population was found: from 3.59/100,000 males in 1988 to 5.21/100,000 males in 2013, and from 3.15/100,000 females in 1988 to 4.45/100,000 females in 2013. ASI adjusted by race revealed a relatively pronounced increase in the white population compared to African American and other races, with an increase from 3.07/100,000 persons in 1988 to 4.79/100,000 persons in 2013. Males had a 19% higher likelihood of CRC-related death compared to females [hazard ratio (HR) = 1.19, 95% confidence interval (CI): 1.16-1.23], and African American had a 1.34-fold higher likelihood of CRC-related death compared to whites (95% CI: 1.28-1.39). CRC-related death was significantly higher in patients with signet ring-cell histology (HR = 1.56, 95% CI: 1.45-1.68), compared to patients with adenocarcinoma. Male gender, and advanced stage predicted a higher likelihood of CRC-related death in African Americans compared to the whole population. Signet ring-cell histology, advanced stage, and advanced grade were significantly associated with CRC-related death in African-American patients. CONCLUSION: This study corroborates emerging data that the (ASI) of young-onset CRC is increasing. It also identified factors associated with cancer-specific death in this population that may aid in targeting screening strategies for adults < 50 years old.
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