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65 歳からの平均余命のうち「健康でない年数」は、何を健康と数えるかで男性 1.58〜4.97 年、女性 3.26〜7.22 年と 3 倍ほど違う——日常生活に影響があるか、健康と思えるか、要介護2〜5か [M061]

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

Abstract

令和6年簡易生命表の 65 歳・75 歳の平均余命を、①日常生活に影響がない(国民生活基礎調査 2025 年)、②健康と思う(同)、③要介護2〜5でない(介護給付費等実態統計 2025 年 7 月・人口推計)の三つの数え方で、サリバン法により健康な年数と健康でない年数に分けた。 65 歳からの平均余命(男性 19.47 年・女性 24.38 年)のうち健康でない年数は、①で男性 4.97・女性 7.22 年、②で 4.05・5.35 年、③で 1.58・3.26 年と、数え方で 3 倍ほど違う(①は③の男性 3.15 倍・女性 2.21 倍)。健康な年数は男女とも ③ > ② > ① の順で、三つの幅は男性 3.39 年・女性 3.96 年。女性は平均余命が長く、健康でない年数もどの数え方でも長い。③を要支援まで広げると健康でない年数は男性 3.10・女性 6.29 年に延び、女性の 75 歳では①との順が入れ替わる。分けるのは、何を「健康」と数えるかである。 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。公表されている健康寿命の値を出し直すものではない。健康を延ばす方法には立ち入らない。①②は入院者を含まない調査の答え、③は申請して認定された人の数である。一人の見通しではない。出典:国民生活基礎調査・簡易生命表・介護給付費等実態統計・人口推計(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。 ----- Life expectancy at 65 and 75 from the 2024 abridged life table was divided by the Sullivan method into healthy and unhealthy years under three ways of counting: (1) no limitation in daily life (Comprehensive Survey of Living Conditions 2025), (2) self-rated healthy (same), and (3) not at care levels 2–5 (Survey of Long-term Care Benefit Expenditures, July 2025, with the Population Estimates). Of life expectancy at 65 (19.47 years for men, 24.38 for women), the unhealthy years are 4.97 for men and 7.22 for women under (1), 4.05 and 5.35 under (2), and 1.58 and 3.26 under (3), differing about threefold (3.15 times for men and 2.21 for women between (1) and (3)). For both sexes, healthy years are in the order (3) > (2) > (1), with a spread of 3.39 years for men and 3.96 for women. Women have longer life expectancy and longer unhealthy years under every way of counting. Extending (3) to the support levels lengthens the unhealthy years to 3.10 for men and 6.29 for women, and for women at 75 the order against (1) changes. What separates them is what is counted as "healthy." 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 This is a preprint that has not been peer reviewed.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 recompute the published healthy life expectancy. It does not go into ways to extend health. (1) and (2) are survey answers excluding people in hospital, and (3) is the number who applied and were certified. It is not an outlook for any one person. Source: processed from the Comprehensive Survey of Living Conditions, the abridged life table, the Survey of Long-term Care Benefit Expenditures, and the Population Estimates (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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