A reference tool reproducing the National Cancer Center Japan's point-based gastric cancer risk model. It scores sex, age, smoking, high-salt food intake, family history, and H. pylori/atrophic gastritis status into a 10-year reference figure. This result is not an individual probability of developing the disease.
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Calculation basis and official references
Reviewed on:
This calculator is not a diagnosis, treatment plan, or prescription. Please consult a qualified clinician about your medical decisions.
Formula basis
An age-by-sex point value is assigned from six five-year age bands between 40 and 70 (0-5 points for women, 1-10 points for men), plus ABC-classification points (Group A, H. pylori negative with no atrophy = 0; Group B, H. pylori positive only = 8; Groups C/D, H. pylori positive with atrophy or H. pylori negative with atrophy = 11), plus 1 point each for family history, current smoking, and habitual high-salt food intake. The total score (0-24) is then mapped to the published probability table released by the National Cancer Center Japan (0-10 points show 0.4% or below; 11 points and above rise in increments up to 13.4%).
Calculation method
Estimates a 10-year gastric cancer diagnosis rate from a points-based score using sex, age, current smoking, habitual intake of salt-preserved foods, family history of gastric cancer, and H. pylori infection combined with atrophic gastritis status (the ABC classification).
Exclusions and checks required
This reproduces a simplified point-sheet version of the underlying Cox proportional-hazards statistical model built for clinical convenience; it does not guarantee an individual's exact incidence probability.
The underlying cohort was drawn from specific regions of Japan, which limits generalizability to other populations.
This calculator requires a known ABC classification result (pepsinogen level and H. pylori antibody test) and cannot be used without it.
Example input:：Example: male, age 50-54, family history present, current smoker, high-salt diet, H. pylori positive, atrophic gastritis present
sex
Male
age
50-54
family
Present
smoke
Present
salt
High
hp
Positive
atrophy
Present
The total of 18 points displays as a '10-year gastric cancer probability of 3.2%', but this is a population-statistics estimate from a point-based model; it is not a probability of you personally developing cancer.
生活習慣リスク因子とABC分類を用いた個人の胃がん罹患予測モデルの精度についてNational Cancer Center Japan, Institute for Cancer Control, Prevention-related Project (Japan Public Health Center-based Prospective Study, JPHC Study)
Who is this calculator for? 10-Year Gastric Cancer Reference Risk
A reference tool reproducing the National Cancer Center Japan's point-based gastric cancer risk model. It scores sex, age, smoking, high-salt food intake, family history, and H. pylori/atrophic gastritis status into a 10-year reference figure. This result is not an individual probability of developing the disease.
What values should I enter?
Applies to: Risk reference
How should I interpret this estimate?
Estimates a 10-year gastric cancer diagnosis rate from a points-based score using sex, age, current smoking, habitual intake of salt-preserved foods, family history of gastric cancer, and H. pylori infection combined with atrophic gastritis status (the ABC classification).
How to use
Enter your input values and press Calculate.
Review the result and compare it with expected context.
An age-by-sex point value is assigned from six five-year age bands between 40 and 70 (0-5 points for women, 1-10 points for men), plus ABC-classification points (Group A, H. pylori negative with no atrophy = 0; Group B, H. pylori positive only = 8; Groups C/D, H. pylori positive with atrophy or H. pylori negative with atrophy = 11), plus 1 point each for family history, current smoking, and habitual high-salt food intake. The total score (0-24) is then mapped to the published probability table released by the National Cancer Center Japan (0-10 points show 0.4% or below; 11 points and above rise in increments up to 13.4%).