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<p>Obstructive sleep apnea (OSA) and hypertension form a vicious cycle. While sedentary behavior is an emerging risk factor for OSA, and the dietary approaches to stop hypertension (DASH) diet offers cardiometabolic benefits, their interplay in non-obese hypertensive patients remains unclear. This study investigates whether DASH adherence moderates the association between sedentary time and OSA risk in a rural Chinese hypertensive population with predominantly normal BMI. A cross-sectional study was conducted among rural Chinese hypertensive adults. We examined the associations of DASH diet adherence (quartiles, Q1–Q4) and daily sedentary time with OSA risk categories (low, intermediate, high) using a generalized ordered logit model. The risk of OSA was assessed via the STOP-BANG questionnaire. The interaction effect between DASH quartiles and sedentary time on OSA risk was examined. 797 participants were recruited, of whom 62.2% had a normal body mass index. A significant interaction between DASH quartiles and sedentary time was observed (<i>P</i> &lt; 0.001). Higher DASH adherence progressively attenuated the adverse association between sedentary time and the elevated risk of OSA, the effect size diminished from 0.305 in the lowest diet quartile to 0.008 in the highest. Key threshold-specific determinants of elevated OSA risk included age (60–74: Threshold 1:AOR 6.04; ≥ 75: Threshold 1:AOR 4.84) and waist circumstance (Threshold 1: AOR 1.05). High DASH adherence may attenuate the elevated OSA risk associated with sedentary behavior. This suggests an actionable lifestyle strategy for managing both hypertension and OSA risk in predominantly normal-weight individuals.</p>

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Adherence to the DASH diet moderates the association between sedentary time and the risk of obstructive sleep apnea in a hypertensive rural Chinese population: a cross-sectional study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月31日

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  • Yong Lin,
  • Lijuan Bao,
  • Yanli Zhao,
  • Shaolian Huang,
  • Yuhua Ruan,
  • Li Wang,
  • Yi Chen

摘要

Obstructive sleep apnea (OSA) and hypertension form a vicious cycle. While sedentary behavior is an emerging risk factor for OSA, and the dietary approaches to stop hypertension (DASH) diet offers cardiometabolic benefits, their interplay in non-obese hypertensive patients remains unclear. This study investigates whether DASH adherence moderates the association between sedentary time and OSA risk in a rural Chinese hypertensive population with predominantly normal BMI. A cross-sectional study was conducted among rural Chinese hypertensive adults. We examined the associations of DASH diet adherence (quartiles, Q1–Q4) and daily sedentary time with OSA risk categories (low, intermediate, high) using a generalized ordered logit model. The risk of OSA was assessed via the STOP-BANG questionnaire. The interaction effect between DASH quartiles and sedentary time on OSA risk was examined. 797 participants were recruited, of whom 62.2% had a normal body mass index. A significant interaction between DASH quartiles and sedentary time was observed (P < 0.001). Higher DASH adherence progressively attenuated the adverse association between sedentary time and the elevated risk of OSA, the effect size diminished from 0.305 in the lowest diet quartile to 0.008 in the highest. Key threshold-specific determinants of elevated OSA risk included age (60–74: Threshold 1:AOR 6.04; ≥ 75: Threshold 1:AOR 4.84) and waist circumstance (Threshold 1: AOR 1.05). High DASH adherence may attenuate the elevated OSA risk associated with sedentary behavior. This suggests an actionable lifestyle strategy for managing both hypertension and OSA risk in predominantly normal-weight individuals.