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Journal of stroke · 2026

Post-Discharge Ambient Sulfur Dioxide Exposure and Stroke Recurrence After Acute Ischemic Stroke.

СтатьяНазвание и аннотация: Перевод пока не подготовлен
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Lee Keon-Joo, Hwang Jeongeun, Kim Seong-Eun, Kim Beom Joon, Han Moon-Ku, Kim Hyunsoo, Kim Joon-Tae, Choi Kang-Ho, Yum Kyu Sun, Shin Dong-Ick, Cha Jae-Kwan, Kim Dae-Hyun, Gwak Dong-Seok, Kim Dong-Eog, Park Jong-Moo, Kang Kyusik, Lee Soo Joo, Kim Jae Guk, Lee Minwoo, Oh Mi-Sun, Yu Kyung-Ho, Park Hong-Kyun, Hong Keun-Sik, Cho Yong-Jin, Kim Joong-Goo, Choi Jay Chol, Park Tai Hwan, Park Sang-Soon, Kwon Jee-Hyun, Kim Wook-Joo, Kwon Doo Hyuk, Lee Jun, Lee Kyungbok, Lee Jeong-Yoon, Sohn Sung Il, Hong Jeong-Ho, Park Kwang-Yeol, Jeong Hae-Bong, Kim Chulho, Lee Sang-Hwa, Lee Juneyoung, Bae Hee-Joon, CRCS-K-NIH Investigators

Аннотация

BACKGROUND AND PURPOSE: Ambient air pollution is an established risk factor for incident stroke, but whether post-discharge pollutant exposure influences stroke recurrence remains unclear. We investigated the association between post-discharge exposure to six ambient air pollutants and stroke recurrence after acute ischemic stroke.

METHODS: We analyzed 27,340 patients in the Clinical Research Collaboration for Stroke in Korea-National Institutes of Health nationwide multicenter registry (2014-2021). The 3-month post-discharge district-level mean concentrations of particulate matter ≤10 μm (PM10), ≤2.5 μm (PM2.5), nitrogen dioxide, sulfur dioxide (SO2), carbon monoxide, and ozone were estimated by inverse-distance-weighted interpolation. The primary outcome was stroke recurrence from 3 to 15 months post-discharge. Cause-specific Cox models with cluster-robust standard errors were used, treating death as a competing risk; non-linear dose-response was assessed by restricted cubic splines.

RESULTS: During follow-up (median 364.8 days), 764 patients had recurrence and 542 died. Only SO2 showed a significant association with recurrence (P for overall association in the spline model= 0.024), with a graded dose-response; the non-linear (J-shaped) pattern did not reach significance (P for non-linearity=0.095), and quartile contrasts were individually non-significant (Q4 vs. Q1: hazard ratio 1.19, 95% confidence interval 0.94-1.50). The association was numerically stronger among older adults (≥75 years; P for interaction=0.051) and women (P for interaction=0.062). The highest SO2 concentrations were observed in harbor cities (Incheon, Ulsan, Busan). No significant associations were observed for the other five pollutants.

CONCLUSIONS: Elevated post-discharge SO2 exposure was associated with increased stroke recurrence, with a graded dose-response, supporting consideration of ambient air quality in secondary stroke prevention.