Abstract：
OBJECTIVE: Our aim is to evaluate the impact of surface ultraviolet radiation intensity on hospital admissions for stroke and to compare the correlation and differences among different subtypes of strokes.
METHODS: We collected daily data on surface ultraviolet radiation intensity, temperature, air pollution, and hospital admissions for stroke in Harbin from 2015 to 2022. Using a distributed lag non-linear model, we determined the correlation between daily surface ultraviolet radiation intensity and the stroke admission rate. Relative risks (RR) with 95% confidence intervals (CI) and attributable fractions (AF) with 95% CI were calculated based on stroke subtypes, gender, and age groups.
RESULTS: A total of 132,952 hospitalized stroke cases (including hemorrhagic and ischemic strokes) were included in the study. We assessed the non-linear effects of ultraviolet intensity on hospitalized patients with ischemic and hemorrhagic strokes. Compared to the maximum morbidity benchmark ultraviolet intensity (19.2 × 10^5 for ischemic stroke and 20.25 for hemorrhagic stroke), over the 0-10 day lag period, the RR for extreme low radiation (1st percentile) was 0.86 (95% CI: 0.77, 0.96), and the RR for extreme high radiation (99th percentile) was 0.86 (95% CI: 0.77, 0.96). In summary, -4.842% (95% CI: -7.721%, -2.167%) and -1.668% (95% CI: -3.061%, -0.33%) of ischemic strokes were attributed to extreme low radiation intensity with a lag of 0 to 10 days and extreme high radiation intensity with a lag of 0 to 5 days, respectively. The reduction in stroke hospitalization rates due to low or high ultraviolet intensity was more pronounced in females and younger individuals compared to males and older individuals. None of the mentioned ultraviolet intensity intensities and lag days had a statistically significant impact on hemorrhagic stroke.
CONCLUSIONS: Our study fundamentally suggests that both lower and higher levels of surface ultraviolet radiation intensity in Harbin, China, contribute to a reduced incidence of ischemic stroke, with this effect lasting approximately 10 days. This finding holds significant potential for public health and clinical relevance.
METHODS: We collected daily data on surface ultraviolet radiation intensity, temperature, air pollution, and hospital admissions for stroke in Harbin from 2015 to 2022. Using a distributed lag non-linear model, we determined the correlation between daily surface ultraviolet radiation intensity and the stroke admission rate. Relative risks (RR) with 95% confidence intervals (CI) and attributable fractions (AF) with 95% CI were calculated based on stroke subtypes, gender, and age groups.
RESULTS: A total of 132,952 hospitalized stroke cases (including hemorrhagic and ischemic strokes) were included in the study. We assessed the non-linear effects of ultraviolet intensity on hospitalized patients with ischemic and hemorrhagic strokes. Compared to the maximum morbidity benchmark ultraviolet intensity (19.2 × 10^5 for ischemic stroke and 20.25 for hemorrhagic stroke), over the 0-10 day lag period, the RR for extreme low radiation (1st percentile) was 0.86 (95% CI: 0.77, 0.96), and the RR for extreme high radiation (99th percentile) was 0.86 (95% CI: 0.77, 0.96). In summary, -4.842% (95% CI: -7.721%, -2.167%) and -1.668% (95% CI: -3.061%, -0.33%) of ischemic strokes were attributed to extreme low radiation intensity with a lag of 0 to 10 days and extreme high radiation intensity with a lag of 0 to 5 days, respectively. The reduction in stroke hospitalization rates due to low or high ultraviolet intensity was more pronounced in females and younger individuals compared to males and older individuals. None of the mentioned ultraviolet intensity intensities and lag days had a statistically significant impact on hemorrhagic stroke.
CONCLUSIONS: Our study fundamentally suggests that both lower and higher levels of surface ultraviolet radiation intensity in Harbin, China, contribute to a reduced incidence of ischemic stroke, with this effect lasting approximately 10 days. This finding holds significant potential for public health and clinical relevance.
摘要：
目的：我们的目的是评估表面紫外线辐射强度对中风入院的影响，并比较中风不同亚型之间的相关性和差异。
方法：我们收集了表面紫外线辐射强度的每日数据，温度,空气污染,2015年至2022年哈尔滨因中风入院。使用分布滞后非线性模型，我们确定了每日表面紫外线辐射强度与中风入院率之间的相关性。根据卒中亚型计算95%置信区间(CI)的相对风险(RR)和95%CI的归因分数(AF)。性别,和年龄组。
结果：本研究共纳入132,952例住院卒中病例（包括出血性和缺血性卒中）。我们评估了紫外线强度对缺血性和出血性中风住院患者的非线性影响。与最大发病率基准紫外线强度（缺血性中风为19.2×10^5，出血性中风为20.25）相比，在0-10天的滞后期内，极低辐射的RR(第1百分位数)为0.86(95%CI：0.77，0.96)，极端高辐射的RR（第99百分位数）为0.86（95％CI：0.77，0.96）。总之,-4.842%（95%CI：-7.721%，-2.167%）和-1.668%（95%CI：-3.061%，-0.33％）的缺血性中风归因于极低辐射强度，滞后0至10天和极高辐射强度，滞后0至5天，分别。与男性和老年人相比，女性和年轻人因紫外线强度低或高而导致的中风住院率降低更为明显。上述紫外线强度和滞后日均未对出血性中风产生统计学上的显着影响。
结论：我们的研究从根本上表明，哈尔滨较低和较高的表面紫外线辐射强度，中国,有助于降低缺血性中风的发病率，这种效果持续约10天。这一发现对公共卫生和临床相关性具有重大潜力。
方法：我们收集了表面紫外线辐射强度的每日数据，温度,空气污染,2015年至2022年哈尔滨因中风入院。使用分布滞后非线性模型，我们确定了每日表面紫外线辐射强度与中风入院率之间的相关性。根据卒中亚型计算95%置信区间(CI)的相对风险(RR)和95%CI的归因分数(AF)。性别,和年龄组。
结果：本研究共纳入132,952例住院卒中病例（包括出血性和缺血性卒中）。我们评估了紫外线强度对缺血性和出血性中风住院患者的非线性影响。与最大发病率基准紫外线强度（缺血性中风为19.2×10^5，出血性中风为20.25）相比，在0-10天的滞后期内，极低辐射的RR(第1百分位数)为0.86(95%CI：0.77，0.96)，极端高辐射的RR（第99百分位数）为0.86（95％CI：0.77，0.96）。总之,-4.842%（95%CI：-7.721%，-2.167%）和-1.668%（95%CI：-3.061%，-0.33％）的缺血性中风归因于极低辐射强度，滞后0至10天和极高辐射强度，滞后0至5天，分别。与男性和老年人相比，女性和年轻人因紫外线强度低或高而导致的中风住院率降低更为明显。上述紫外线强度和滞后日均未对出血性中风产生统计学上的显着影响。
结论：我们的研究从根本上表明，哈尔滨较低和较高的表面紫外线辐射强度，中国,有助于降低缺血性中风的发病率，这种效果持续约10天。这一发现对公共卫生和临床相关性具有重大潜力。
