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介護が必要になった主な原因の 1 位は認知症(10 万対 16,743)だが、当てはまるものを全部選ぶと高齢による衰弱(26,100)——年齢では脳血管疾患(65〜79 歳)・認知症(80〜89 歳)・高齢による衰弱(90 歳以上)と入れ替わり、女性は 1〜3 位が 98 の差に並ぶ [M059]

Sep 2026 · Zenodo (CERN European Organization for Nuclear Research)

Abstract

令和7年国民生活基礎調査(介護票)で、介護が必要になった原因を、主な原因(一つ)と原因(複数回答)の二つの表で、性と年齢ごとに並べた(数は介護を要する者 10 万対)。 男女計の 1 位は、主な原因では認知症(16,743)、複数回答では高齢による衰弱(26,100)で、選び方で 1 位が替わる。男性はどちらでも脳血管疾患が 1 位、女性の主な原因は高齢による衰弱・骨折・転倒・認知症が 98 の差に並ぶ。年齢では、主な原因の 1 位が 65〜79 歳の脳血管疾患、80〜89 歳の認知症、90 歳以上の高齢による衰弱(0.298)と入れ替わり、複数回答でも順は同じ。複数回答 ÷ 主な原因は視覚・聴覚障害 3.50・糖尿病 3.12・呼吸器疾患 2.61・心疾患 2.53 と大きく、挙がっても主な原因にはなりにくい。要介護3〜5だけを数えると、高齢による衰弱は 2 位から 4 位になる。分けるのは、原因を一つだけ選ぶか、当てはまるものを全部選ぶかである。 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。原因を減らす方法・予防には立ち入らない。抽出の調査の推計で、差の小さい順位は揺れの中にあるかもしれない。原因は調査の答えで、診断の記録ではない。一人の見通しではない。出典:国民生活基礎調査(e-Stat)を加工して作成。 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。 ----- Using the 2025 Comprehensive Survey of Living Conditions (long-term care questionnaire), the causes for needing care were lined up by sex and age in two tables: the main cause (one) and causes (multiple answers) (numbers per 100,000 people needing care). For both sexes the leader is dementia (16,743) as the main cause and frailty due to old age (26,100) in multiple answers, so the leader changes with how causes are chosen. Men are led by cerebrovascular disease in both, and for women frailty, fracture or fall, and dementia are within 98 as main causes. By age, the leading main cause shifts from cerebrovascular disease at 65–79 to dementia at 80–89 and frailty due to old age at 90+ (0.298), in the same order in multiple answers. Multiple answers ÷ main cause is large for visual or hearing impairment 3.50, diabetes 3.12, respiratory disease 2.61, and heart disease 2.53: often named but rarely the main cause. Counting only care levels 3–5, frailty moves from 2nd to 4th. What separates them is whether one cause is chosen or all that apply. 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 This is a preprint that has not been peer reviewed.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 ways to reduce or prevent the causes. These are estimates from a sample survey, and ranks with small differences may be within the variation. The causes are survey answers, not diagnostic records. It is not an outlook for any one person. Source: processed from the Comprehensive Survey of Living Conditions (e-Stat). 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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