閉経後女性における睡眠時間と抑うつとのU字型関連:集団ベース研究からのエビデンス
Yue Zhu1, Feng Chen2, Xianyu Fang1
1Public Health College, Wenzhou Medical University, Wenzhou, Zhejiang, China.
Journal of affective disorders
|December 20, 2025
まとめ
短すぎる睡眠と長すぎる睡眠の両方が閉経後女性の抑うつリスクを高める。睡眠時間は、この集団における抑うつ予防と管理のための潜在的に修正可能な要因である。
科学分野:
- 生殖器系の健康
- 睡眠医学
- 精神医学
背景:
- 睡眠障害とうつ病は閉経後女性に一般的である。
- この人口集団における睡眠時間とうつ病重症度との正確な関係はよく理解されていない。
研究 の 目的:
- 閉経後女性における睡眠時間と抑うつ症状との関連を調査すること。
- 睡眠時間と抑うつ重症度との間の用量反応関係および潜在的なU字型曲線を探求すること。
主な方法:
- 4891人の閉経後女性を対象とした大規模な米国全国健康調査(2007-2016年)のデータを利用した。
- PHQ-9を使用して抑うつを評価し、睡眠時間を7時間未満(不十分)、7〜8時間(正常)、8時間超(長い)に分類した。
- 睡眠とうつ病の関連を調べるために、ロジスティック回帰、一般化加法モデル(GAM)、および制限立方スプライン分析を使用した。
主要な成果:
- 睡眠時間と抑うつとの間にはU字型の関連が観察され、転換点は7.5時間であった。
- 不十分な睡眠(OR=2.313)と長い睡眠(OR=1.600)の両方が、通常の睡眠時間と比較して抑うつ確率の上昇と関連していた。
- 不十分な睡眠は抑うつ重症度との用量反応関係を示したが、長い睡眠も中等度から重度の抑うつと関連していた。
結論:
- 睡眠時間は閉経後女性の抑うつとのU字型の関連を示す。
- 短い睡眠時間と長い睡眠時間の両方が、抑うつ確率の増加と相関している。
- 睡眠時間は、この集団における抑うつに対処するための潜在的に修正可能な要因を表す。
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