Ann Surg Treat Res.  2018 Jan;94(1):36-43. 10.4174/astr.2018.94.1.36.

Anatomical distribution and detection rate of colorectal neoplasms according to age in the colonoscopic screening of a Korean population

• Lee SY
• Song WH
• Oh SC
• Min BW
• Lee SI

• KMID: 2405337
• DOI: http://doi.org/10.4174/astr.2018.94.1.36

Abstract

PURPOSE
Because data as a basis for the determination of proper age and modality for screening of colorectal neoplasms is lacking, we evaluated detection rates and anatomical distribution of colorectal neoplasms according to age in healthy individuals who underwent total colonoscopy for health checkup.
METHODS
A total of 16,100 cases that had received the colonoscopic examination from January to December in 2014 were analyzed. The total number of individuals who received total colonoscopy were divided by the number of individuals harboring colorectal adenoma to calculate the detection rate of colorectal adenoma. Individuals ≤50 years old were classified as young-age group and aged >50 were old-age group. Differences in anatomical locations of colorectal neoplasms were analyzed in the 2 age groups by chi-square test. Risk factors for colorectal adenoma in each age group were analyzed using univariate and multivariate logistic regression analyses.
RESULTS
Detection rates of colorectal adenoma were 13.7% in all cases and 12.8% for those in their 40"²s. The main anatomical location of colorectal adenoma was proximal colon in both age groups (P < 0.001). Hyperplastic polyp was mainly distributed to the distal colon in both age groups (P < 0.001). Distal colon was the major site for colorectal cancer in the old-age group (P = 0.001). Proximal location of neoplasms was a risk factor for colorectal adenoma in both age groups with multivariate analysis.
CONCLUSION
These data could be the bases for earlier initiation of screening for colorectal neoplasms with total colonoscopy to detect clinically significant colorectal polyps.

Keyword

Colorectal neoplasms; Adenoma; Distribution

MeSH Terms

Adenoma
Colon
Colonoscopy
Colorectal Neoplasms*
Humans
Logistic Models
Mass Screening*
Multivariate Analysis
Polyps
Risk Factors

Figure

• 

  Fig. 1 Detection rates of colorectal adenoma according to age.

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