ObjectiveTo quantify the global burden of chronic obstructive pulmonary disease (COPD) attributable to high temperature, low temperature, and non-optimal temperature from 1990 to 2021 using the Global Burden of Disease (GBD) 2021 data. MethodsBased on the GBD 2021 data, we analyzed global, regional, and national COPD mortality and disability-adjusted life years (DALYs) from COPD attributable to high, low, and non-optimal temperatures. Joinpoint regression, age-period-cohort modeling, and Bayesian prediction models were employed. ResultsGlobally, age-standardized mortality rates (ASMR) and age-standardized DALYs rates (ASDR) for COPD attributable to low temperature and non-optimal temperature declined. However, the burden from high temperature increased. Low temperature consistently exerted a greater burden than high temperature across all metrics. Significant geographical disparities emerged: high-temperature mortality was highest in South Asia; low-temperature burden was most severe in East Asia; and high-income North America exhibited accelerated high-temperature mortality growth. The highest low-temperature burden occurred in middle-SDI region, while high-temperature impacts predominated in low-middle-SDI region. Age patterns showed rising high-temperature burden in the 15-39 age group and increasing low-temperature burden among adults ≥80 years old. Bayesian projections revealed divergent gender trajectories: a continuing decline in low-temperature burden for males versus a decelerated decline for females (2020-2030). ConclusionLow temperature exposure remains the primary risk factor for COPD within non-optimal temperatures globally, although high-temperature impacts are increasing. Significant regional variations necessitate targeted interventions for three key populations: older adults vulnerable to cold, working-age adults with occupational heat exposure, and older women requiring rehabilitative support.
Objective To know more about the correlation between patent foramen ovale (PFO) and ischemic stroke among young and middle-aged people through analysis on various risk factors of ischemic stroke. Methods Eighty-three patients with cerebral infarction from 15 to 55 years old diagnosed for the first time in the Department of Neurology of Xianyang Hospital between January 2016 and January 2017 were selected as the study subjects. They were divided into two groups, PFO group (n=42) and non-PFO group (n=41). Seventy-eight heathy people from the Physical Examination Department of the same hospital were selected as controls. All patients and heathy subjects underwent transcranial Doppler (TCD) foaming experiments, and the occurrence and shunt volume of PFO were observed. General information and cerebrovascular disease risk factors of the patients were investigated. Results The age of subjects in PFO and non-PFO groups was not significantly different (P>0.05). Among the risk factors, there was no significant difference between the PFO and non-PFO groups in drinking history (P>0.05). The incidences of other ischemic stroke risk factors (hypertension, diabetes, smoking, hyperlipidemia, hyperhomocysteinemia, and carotid arteriosclerosis) in the PFO group were significantly lower than those in the non-PFO group (P<0.05). The rank sum test results showed that large and medium shunt rates of the cerebral infarction group were significantly higher than those of the control group (P<0.05). Conclusions PFO may be one of the cause of ischemic stroke in young and middle-aged people. Pathogenesis of ischemic stroke is likely to have a relationship with the severity of the shunt from right to left.