Sep 2026· Zenodo (CERN European Organization for Nuclear Research)
Abstract
全国がん登録が公表する「死亡/罹患比(MI 比)」——その年にがんで亡くなった人の数 ÷ その年にがんと診断された人の数——が、何を表し、何を表さないかを確かめた。2023 年の MI 比を、同じ部位の 5 年相対生存率(2018 年診断)、期間法の 5 年と 10 年の生存率、登録の精度の指標と並べた。 表 8-A の MI 比は、人口動態統計の死亡数 ÷ 全国がん登録の罹患数で、19 部位 × 性の 54 組とも差 0.00039 以内で作り直せる(同じ年の二つの別の統計の比)。2023 年の MI 比は皮膚の 0.068 から膵臓の 0.845 まで開く。MI 比を 1 − 5 年相対生存率で割ると、19 部位のうち 10 部位が 0.9〜1.1 に入り(膵臓 0.97・肺 1.01)、前立腺 3.07・乳房 1.48 がいちばん外れる。その 2 組は、期間法で 5 年から 10 年のあいだの死亡の伸びがいちばん大きい 2 組でもあるが、31 組全体の順位相関は 0.254 と弱い。MI 比が高い部位ほど、死亡情報だけで登録された割合(DCO)も高い(順位相関 0.794)。MI 比は「診断された人のうち亡くなる割合」ではない。 本稿は公開の集計データの数の形を述べる構造的解釈であり、医学的な助言・診断・治療の推奨ではない。著者は医師ではない。個人の健康に関する判断は医師・医療機関に相談すること。査読を経ていないプレプリントである。新しい数学定理も新しい法則も主張しない。一人の見通しではなく、とくに膵臓の数は診断された一人ひとりの見通しではない。差の理由を一つに決めず、地域・施設を比べない。出典:全国がん登録・人口動態統計(e-Stat)を加工して作成、国立がん研究センターがん情報サービス。 作成にあたって:本稿の着想と内容は、著者自身の考察に基づくものです。文章の構成整理や英訳、数式の確認には AI(大規模言語モデル)の助力を得ました。最終的な内容の解釈や誤りがあれば、それらはすべて著者の責に帰します。お気づきの点があれば、ご教示いただければ幸いです。 ----- This paper checks what the "mortality-to-incidence ratio" (MI ratio) published by the National Cancer Registry — the number of people who died of cancer in a year ÷ the number diagnosed with cancer in that year — does and does not show. It sets the 2023 MI ratios beside 5-year relative survival for the same sites (diagnosed 2018), period-analysis 5- and 10-year survival, and registration-quality indicators. The MI ratios of Table 8-A can be rebuilt as Vital Statistics deaths ÷ National Cancer Registry incidence within 0.00039 for all 54 groups of 19 sites × sex (a ratio of same-year numbers from two different statistics). The 2023 MI ratio runs from 0.068 for skin to 0.845 for pancreas. Dividing it by 1 − 5-year relative survival, 10 of 19 sites fall within 0.9–1.1 (pancreas 0.97, lung 1.01), and prostate (3.07) and breast (1.48) depart the most. Those two are also the two with the largest period-analysis growth in death between 5 and 10 years, but the rank correlation across 31 groups is weak at 0.254. The higher a site's MI ratio, the higher its share of cases registered from death information only (DCO; rank correlation 0.794). The MI ratio is not "the share of diagnosed people who die." This paper is a structural interpretation of the shape of numbers in public aggregate data; it is not medical advice, not a diagnosis, and not a treatment recommendation. The author is not a physician. Decisions about individual health should be discussed with a physician or a medical institution. This is a preprint that has not been peer reviewed. No new mathematical theorem and no new law are claimed. It is not an individual outlook; in particular, the pancreas figures are not the outlook of any one person diagnosed. It does not settle a single reason for the gap and does not compare regions or facilities. Source: processed from the National Cancer Registry and Vital Statistics (e-Stat); National Cancer Center Japan, Cancer Information Service. On the making of this work: The ideas and content of this work stem from the author's own considerations. Assistance from an AI (a large language model) was used for structuring, English translation, and checking the algebra. Any remaining errors or misinterpretations are solely the author's. Feedback and corrections are sincerely appreciated.
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