<p>Stroke is the second leading cause of death globally. Oxidative stress plays a critical role in the development of stroke. The Oxidative Balance Score (OBS) is a tool used to assess the combined impact of diet and lifestyle on the body’s antioxidant capacity. The study included stroke survivors from the National Health and Nutrition Examination Survey (1999–2018), with a total of 1,781 participants and a median follow-up duration of 6.5 years, during which 786 participants (39.59%) died. The relationship between OBS and all-cause mortality was assessed using the Cox proportional hazards model. The results indicated that individuals in higher OBS quartiles had lower mortality rates. Specifically, patients in the fourth quartile had a 41% reduced risk of all-cause mortality compared to those in the first quartile (HR = 0.59, 95% CI = 0.42–0.84, <i>p</i> = 0.003). Restricted cubic spline analysis revealed a linear inverse relationship between OBS and all-cause mortality. Subgroup analysis further demonstrated that the inverse association persisted across various population subgroups. Overall, our study suggests that higher levels of OBS can reduce the risk of all-cause mortality in stroke survivors and provides new evidence for their diet and lifestyle.</p>

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Association between oxidative balance score and all-cause mortality in stroke survivors

  • Jinglin Lei,
  • Zhiyi Liao,
  • Wentao Duan,
  • Qiuli Li,
  • Lili Duan,
  • Hailiang Tang,
  • Hanyao Luo,
  • Hao Huang,
  • Haipeng Li

摘要

Stroke is the second leading cause of death globally. Oxidative stress plays a critical role in the development of stroke. The Oxidative Balance Score (OBS) is a tool used to assess the combined impact of diet and lifestyle on the body’s antioxidant capacity. The study included stroke survivors from the National Health and Nutrition Examination Survey (1999–2018), with a total of 1,781 participants and a median follow-up duration of 6.5 years, during which 786 participants (39.59%) died. The relationship between OBS and all-cause mortality was assessed using the Cox proportional hazards model. The results indicated that individuals in higher OBS quartiles had lower mortality rates. Specifically, patients in the fourth quartile had a 41% reduced risk of all-cause mortality compared to those in the first quartile (HR = 0.59, 95% CI = 0.42–0.84, p = 0.003). Restricted cubic spline analysis revealed a linear inverse relationship between OBS and all-cause mortality. Subgroup analysis further demonstrated that the inverse association persisted across various population subgroups. Overall, our study suggests that higher levels of OBS can reduce the risk of all-cause mortality in stroke survivors and provides new evidence for their diet and lifestyle.