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Related Concept Videos

Cancer Prevention02:59

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Preventive Healthcare Services01:30

Preventive Healthcare Services

Preventive healthcare services keep people healthy via frequent check-ups, screening, and counseling. They primarily aid in disease prevention rather than treating an acute or chronic illness. Preventive treatment also keeps individuals productive and energetic, allowing them to work well into their retirement years. Examples of preventive care services include:
Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

Assessment of the Gastrointestinal System II: Health Perception Pattern

Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...

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Comparison of Predictive Performance of Three Lymph Node Staging Systems in Colorectal Signet Ring Cell Carcinoma Based on Machine Learning Model
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Comparison of Predictive Performance of Three Lymph Node Staging Systems in Colorectal Signet Ring Cell Carcinoma Based on Machine Learning Model

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Colorectal Cancer Screening Uptake Across Age Groups in an Academic Health System.

Patrick Casebolt1, Kathleen Rice2, Victoria Harris2

  • 1American Cancer Society, Atlanta, Georgia.

American Journal of Preventive Medicine
|May 27, 2026
PubMed
Summary

Colorectal cancer screening adherence increased for adults aged 45-49 years after new guidelines, though it remains lower than for older adults. Screening disparities persisted despite overall adherence improvements across racial and ethnic groups.

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Published on: August 1, 2019

Area of Science:

  • Public Health
  • Gastroenterology
  • Health Services Research

Background:

  • Updated guidelines recommend initiating colorectal cancer (CRC) screening at age 45.
  • This study evaluates CRC screening uptake in an academic setting post-guideline change.
  • Focus is on differences between age groups (45-49 vs. 50-75) and sociodemographic factors.

Purpose of the Study:

  • To assess colorectal cancer screening uptake in adults aged 45-75 following updated screening guidelines.
  • To compare screening adherence between younger adults (45-49) and older adults (50-75).
  • To examine the impact of updated guidelines on screening disparities across sociodemographic characteristics.

Main Methods:

  • Retrospective cohort study of insured, average-risk adults aged 45-75 at UC San Diego Health (2021-2023).
  • Utilized electronic health records to capture CRC screening uptake, modality, and sociodemographic data.
  • Linked individual data with ZIP code-level social vulnerability measures; used Poisson regression to compare adherence.

Main Results:

  • Screening adherence for adults aged 45-49 increased from 20% (2021) to 46% (2023).
  • This younger group consistently showed lower adherence likelihood compared to those aged 50-75 (aPRs ranging from 0.27 to 0.59).
  • Colonoscopy was primary, but stool-based testing increased among 45-49 year olds; adherence rose across all racial/ethnic groups, but disparities remained.

Conclusions:

  • Adults aged 45-49 demonstrated lower CRC screening adherence than older adults, with a growing preference for stool-based tests.
  • Despite guideline changes, CRC screening adherence increased across all racial and ethnic groups, yet existing disparities were not reduced.
  • Findings indicate successful screening promotion efforts at the academic center but highlight the need for targeted interventions to further reduce disparities and improve adherence.