School of Public Health, Lanzhou University, Lanzhou, 730000, PR China.
School of Public Health, Lanzhou University, Lanzhou, 730000, PR China.
Int J Hyg Environ Health. 2021 Jan;231:113658. doi: 10.1016/j.ijheh.2020.113658. Epub 2020 Nov 7.
Significant progress has been made in air pollution control Lanzhou, China recently, however, there was only one study so far on the assessment on health gains from air quality improvement after adopting strict air pollution control measures. The present study aimed to estimate the short-term effects of six criteria air pollutants including PM, PM, NO, SO, CO and O on respiratory admissions in Lanzhou, China, then compare the results of our study with those earlier studies conducted in Lanzhou before the implementation of air pollution control measures. Data on daily hospital admissions from the three largest hospitals in Lanzhou and daily air pollution concentration and meteorological variable were collected during a 4-year period (2014-2017). A generalized additive model; adjusted for long-term trend, seasonality, and other potential confounders was done to quantitatively assess the influences of air pollutants on daily respiratory admissions and analyze the influences of different seasons, sexes, and age groups. The most apparent effects for PM, PM, SO, CO and O on respiratory hospitalizations were observed at lag6, and lag7, respectively, and a 10μg/m increase in PM, PM, SO, CO and O concentration were associated with 0.885% (95%CI: 0.414%1.358%), 0.328% (95%CI: 0.145%0.511%), 3.005% (95%CI: 1.689%4.339%), 3.199% (95%CI: 0.912%5.537%) for CO, 0.733% (95%Cl: 0.263%~1.205%) increase in respiratory admission, respectively. No remarkable association was found between NO and respiratory disease hospitalisation. Females and younger groups were more susceptible to air pollutant than males and elderly groups. Together, we demonstrated that the positive associations were more pronounced in the cold season than in the warm season. The findings in present study suggest that even in Lanzhou, where air quality has been improved dramatically, positive associations still exist between air pollution and daily number of total respiratory admission.
中国兰州在空气污染治理方面取得了显著进展，但迄今为止，仅有一项研究评估了在采取严格的空气污染控制措施后，空气质量改善对健康带来的收益。本研究旨在评估六项空气污染物（PM、PM、NO、SO、CO 和 O）对兰州市呼吸道疾病住院的短期影响，并将研究结果与兰州在实施空气污染控制措施前的早期研究结果进行比较。本研究收集了兰州市三家最大医院的呼吸道疾病住院人数、每日空气污染浓度和气象变量的 4 年数据（2014-2017 年）。采用广义加性模型，调整长期趋势、季节性和其他潜在混杂因素，定量评估了空气污染物对每日呼吸道疾病住院人数的影响，并分析了不同季节、性别和年龄组的影响。对于 PM、PM、SO、CO 和 O，呼吸道疾病住院的最明显影响出现在滞后 6 天和滞后 7 天，PM、PM、SO、CO 和 O 浓度每增加 10μg/m，呼吸道疾病住院的风险分别增加 0.885%（95%CI：0.414%1.358%）、0.328%（95%CI：0.145%0.511%）、3.005%（95%CI：1.689%4.339%）、3.199%（95%CI：0.912%5.537%）和 0.733%（95%CI：0.263%~1.205%）。NO 与呼吸道疾病住院之间没有显著关联。女性和年轻人群比男性和老年人群更容易受到空气污染物的影响。总的来说，我们发现，在寒冷季节，这种正相关关系比在温暖季节更为明显。本研究表明，即使在空气质量得到显著改善的兰州，空气污染与每日呼吸道疾病总住院人数之间仍存在正相关关系。
