Sep 2026· Zenodo (CERN European Organization for Nuclear Research)
Abstract
脳血管疾患の死亡の中で脳梗塞が脳内出血を上回った年が、死亡数で見るときと年齢調整死亡率で見るときで同じかを、人口動態統計の脳血管疾患の内訳(第5.27表)で比べ、人口動態統計特殊報告の年齢別の率(10 歳階級)で年齢ごとの入れ替わりを見た。 男性では、脳梗塞が脳内出血を上回るのが、死亡数と死亡率では 1975→1980 年の間(見積もり 1975.3 年)、年齢調整死亡率では 1970→1975 年の間(見積もり 1970.1 年)で、5 年の区切りが違う。入れ替わりは高い年齢ほど早く、男性の見積もりの年は 90 歳以上で 1965.8 年、60〜69 歳で 1984.2 年、59 歳以下の 3 階級では 2004 年まで入れ替わらない。年齢調整死亡率の重みに使う 2015 年モデル人口は 70 歳以上が 0.192 で、1975 年の人口の 3.61 倍あり、高い年齢で先に起きた入れ替わりを早めに映す。60〜69 歳では、入れ替わったあとに脳内出血が再び上回った。 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。なぜ脳内出血が減り脳梗塞が増えたのかには立ち入らない。1978 年以前の脳内出血は非外傷性頭蓋内出血を含む(表の注)。入れ替わりの年は 5 年の区切りでしか決まらない。一人の見通しではなく、地域を比べない。出典:人口動態統計(e-Stat)を加工して作成、人口動態統計特殊報告(厚生労働省)。 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 whether the year in which cerebral infarction overtook intracerebral hemorrhage among cerebrovascular deaths is the same by death count and by age-standardized death rate, using the Vital Statistics breakdown of cerebrovascular disease (Table 5.27), and looks at the reversal by age using age-specific rates (10-year groups) from a Vital Statistics special report. For men, infarction overtakes hemorrhage between 1975 and 1980 in deaths and crude rates (estimated 1975.3) but between 1970 and 1975 in age-standardized death rates (estimated 1970.1): the 5-year interval differs. The reversal came earlier at older ages; for men the estimated year is 1965.8 at 90 and over and 1984.2 at 60–69, and the three groups aged 59 and under do not reverse by 2004. The 2015 model population used as weights for age standardization has a share of 0.192 aged 70 and over, 3.61 times the 1975 population, and shows early a reversal that came first at older ages. At ages 60–69, hemorrhage exceeded infarction again after the reversal. 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 This is a preprint that has not been peer reviewed.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 does not go into why hemorrhage fell and infarction rose. Intracerebral hemorrhage up to 1978 includes non-traumatic intracranial hemorrhage (table note). Reversal years are fixed only to 5-year intervals. It is not an individual outlook, and does not compare regions. Source: processed from Vital Statistics (e-Stat); Vital Statistics special report (Ministry of Health, Labour and Welfare). 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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