Characteristics of and risk factors for colorectal neoplasms in young adults in a screening population

Seung Eun Lee, Hee Bum Jo, Won Gun Kwack, Yun Jin Jeong, Yeo Jin Yoon, Hyoun Woo Kang

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6 Scopus citations


AIM: To investigate prevalence and risk factors for colorectal neoplasms in adults aged < 50 years, for whom screening is not recommended. METHODS: This cross-sectional study compared prevalence and characteristics of colorectal and advanced adenomas in patients aged < 50 years who underwent colonoscopy screening with subjects aged ≥ 50 years. To evaluate risk factors for colorectal and advanced adenoma in young adults, we used multivariable logistic regression models. Colorectal neoplasm characteristics were evaluated and compared with those in older patients. RESULTS: Among 2819 patients included, prevalences of colorectal adenoma and advanced adenoma were 19.7% and 1.5%, respectively. As patient age increased, so did the prevalence of colorectal neoplasm. However, prevalence of advanced adenoma did not differ between age-groups 45-49 years and ≥ 50 years (OR = 0.43, 95%CI: 0.17-1.07, p = 0.070). In younger age-group (< 50 years), colorectal adenoma was significantly associated with older age, waist circumference (OR = 1.72, 95%CI: 1.15-2.55, p = 0.008), and current smoking (OR = 1.60, 95%CI: 1.07-2.41, p = 0.023). Alcohol consumption was an independent risk factor for colorectal advanced adenoma (OR = 3.69, 95%CI: 1.08-12.54, p = 0.037). Multiple neoplasms and large neoplasms (≥ 1 cm) were more prevalent in subjects ≥ 50 years. CONCLUSION: Current screening strategies for colorectal cancer may need to be amended to account for patient age, especially in young subjects with abdominal obesity, current smoking and alcohol consumption.

Original languageEnglish
Pages (from-to)2981-2992
Number of pages12
JournalWorld Journal of Gastroenterology
Issue number10
StatePublished - 14 Mar 2016
Externally publishedYes



  • Advanced adenoma
  • Cancer screening
  • Colorectal adenoma
  • Colorectal cancer
  • Young patients

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