Association of ambient air pollution with risk of hemorrhagic stroke: A time-stratified case crossover analysis of the Singapore stroke registry

2022 ◽  
Vol 240 ◽  
pp. 113908
Author(s):  
Andrew Fu Wah Ho ◽  
Mervyn Jun Rui Lim ◽  
Huili Zheng ◽  
Aloysius Sheng-Ting Leow ◽  
Benjamin Yong-Qiang Tan ◽  
...  
Keyword(s):  
Air Pollution ◽  
Hemorrhagic Stroke ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Stroke Registry ◽  
Case Crossover ◽  
Crossover Analysis

Ambient air pollution and the hospital outpatient visits for eczema and dermatitis in Beijing: a time-stratified case-crossover analysis

2019 ◽  
Vol 21 (1) ◽  
pp. 163-173 ◽  
Author(s):  
Qun Guo ◽  
Fengchao Liang ◽  
Lin Tian ◽  
Tamara Schikowski ◽  
Wei Liu ◽  
...  
Keyword(s):  
Air Pollution ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Hospital Outpatient ◽  
Case Crossover ◽  
Outpatient Visits ◽  
Crossover Analysis ◽  
Skin Conditions

Consecutive exposure to air pollution increased risks of skin conditions.

scholarly journals Air pollution exposure and risk of spontaneous abortion in the Nurses’ Health Study II

2019 ◽  
Vol 34 (9) ◽  
pp. 1809-1817 ◽  
Author(s):  
Audrey J Gaskins ◽  
Jaime E Hart ◽  
Jorge E Chavarro ◽  
Stacey A Missmer ◽  
Janet W Rich-Edwards ◽  
...  
Keyword(s):  
Air Pollution ◽  
Spontaneous Abortion ◽  
Pregnancy Outcomes ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Health Study ◽  
Case Crossover ◽  
Increased Risk ◽  
Crossover Analysis

Abstract STUDY QUESTION Is there an association between air pollution exposures and the risk of spontaneous abortion (SAB)? SUMMARY ANSWER Higher exposure to particulate matter (PM) air pollution above and beyond a woman’s average exposure may be associated with greater risk of SAB, particularly among women experiencing at least one SAB during follow-up. WHAT IS KNOWN ALREADY There is sufficient biologic plausibility to suggest that air pollution adversely affects early pregnancy outcomes, particularly pregnancy loss; however, the evidence is limited. STUDY DESIGN, SIZE, DURATION Our prospective cohort study included 19 309 women in the Nurses’ Health Study II who contributed a total of 35 025 pregnancies between 1990 and 2008. We also conducted a case-crossover analysis among 3585 women (11 212 pregnancies) with at least one SAB and one live birth during follow-up. PARTICIPANTS/MATERIALS, SETTING, METHODS Proximity to major roadways and exposure to PM <10 microns (PM10), 2.5–10 microns (PM2.5–10) and <2.5 microns (PM2.5) were determined for residential addresses between 1989 and 2007. Pregnancy outcomes were self-reported biannually throughout follow-up and comprehensively in 2009. Multivariable log-binomial regression models with generalized estimating equations were used to estimate the risk ratios and 95% CIs of SAB. Conditional logistic regression was used for the case-crossover analysis. MAIN RESULTS AND THE ROLE OF CHANCE During the 19 years of follow-up, 6599 SABs (18.8% of pregnancies) were reported. In the main analysis, living closer to a major roadway and average exposure to PM10, PM10–2.5 or PM2.5 in the 1 or 2 years prior to pregnancy were not associated with an increased risk of SAB. However, small positive associations between PM exposures and SAB were observed when restricting the analysis to women experiencing at least one SAB during follow-up. In the case-crossover analysis, an increase in PM10 (per 3.9 μg/m3), PM2.5–10 (per 2.3 μg/m3) and PM2.5 (per 2.0 μg/m3) in the year prior to pregnancy was associated with 1.12 (95% CI 1.06, 1.19), 1.09 (95% CI 1.03, 1.14) and 1.10 (95% CI 1.04, 1.17) higher odds of SAB, respectively. LIMITATIONS, REASONS FOR CAUTION We did not have information on the month or day of SAB, which precluded our ability to examine specific windows of susceptibility or acute exposures. We also used ambient air pollution exposures as a proxy for personal exposure, potentially leading to exposure misclassification. WIDER IMPLICATIONS OF THE FINDINGS In our case-crossover analysis (but not in the entire cohort) we observed positive associations between exposure to all size fractions of PM exposure and risk of SAB. This may suggest that changes in PM exposure confer greater risk of SAB or that women with a history of SAB are a particularly vulnerable subgroup. STUDY FUNDING/COMPETING INTEREST(S) The authors are supported by the following NIH grants UM1CA176726, R00ES026648 and P30ES000002. The authors have no actual or potential competing financial interests to disclose.

Ambient air pollution and daily mortality in Anshan, China: A time-stratified case-crossover analysis

2010 ◽  
Vol 408 (24) ◽  
pp. 6086-6091 ◽  
Author(s):  
Renjie Chen ◽  
Guowei Pan ◽  
Haidong Kan ◽  
Jianguo Tan ◽  
Weimin Song ◽  
...  
Keyword(s):  
Air Pollution ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Daily Mortality ◽  
Case Crossover ◽  
Crossover Analysis

scholarly journals Ambient Air Pollution and Hospital Admissions for Peptic Ulcers in Taipei: A Time-Stratified Case-Crossover Study

2019 ◽  
Vol 16 (11) ◽  
pp. 1916 ◽  
Author(s):  
Shang-Shyue Tsai ◽  
Hui-Fen Chiu ◽  
Chun-Yuh Yang
Keyword(s):  
Air Pollution ◽  
Peptic Ulcer ◽  
Crossover Study ◽  
Air Pollutants ◽  
Hospital Admissions ◽  
Ambient Air ◽  
Air Pollutant ◽  
Ambient Air Pollution ◽  
Research Database ◽  
Case Crossover

Very few studies have been performed to determine whether there is a relationship between air pollution and increases in hospitalizations for peptic ulcer, and for those that have occurred, their results may not be completely relevant to Taiwan, where the mixture of ambient air pollutants differ. We performed a time-stratified case-crossover study to investigate the possible association between air pollutant levels and hospital admissions for peptic ulcer in Taipei, Taiwan. To do this, we collected air pollution data from Taiwan's Environmental Protection Agency and hospital admissions for peptic ulcer data for the years 2009–2013 from Taiwan's National Health Insurance's research database. We used conditional logistic regression to analyze the possible association between the two, taking temperature and relative humidity into account. Risk was expressed as odds ratios and significance was expressed with 95% confidence intervals. In our single pollutant model, peptic ulcer admissions were significantly associated with all pollutants (PM10, PM2.5, SO2, NO2, CO, and O3) on warm days (>23 °C). On cool days (<23 °C), peptic ulcer admissions were significantly associated with PM10, NO2, and O3. In our two-pollutant models, peptic ulcer admissions were significantly associated NO2 and O3 when combined with each of the other pollutants on warm days, and with PM10, NO2, and O3 on cool days. It was concluded that the likelihood of peptic ulcer hospitalizations in Taipei rose significantly with increases in air pollutants during the study period.

scholarly journals The impact of ambient air pollution on suicide mortality: a case-crossover study in Guangzhou, China

2016 ◽  
Vol 15 (1) ◽  
Author(s):  
Guo-Zhen Lin ◽  
Li Li ◽  
Yun-Feng Song ◽  
Ying-Xue Zhou ◽  
Shuang-Quan Shen ◽  
...  
Keyword(s):  
Air Pollution ◽  
Crossover Study ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Suicide Mortality ◽  
Case Crossover ◽  
The Impact

Short-term association between ambient air pollution and pneumonia in children: A systematic review and meta-analysis of time-series and case-crossover studies

2017 ◽  
Vol 230 ◽  
pp. 1000-1008 ◽  
Author(s):  
Nguyen Thi Trang Nhung ◽  
Heresh Amini ◽  
Christian Schindler ◽  
Meltem Kutlar Joss ◽  
Tran Minh Dien ◽  
...  
Keyword(s):  
Systematic Review ◽  
Air Pollution ◽  
Time Series ◽  
Meta Analysis ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Short Term ◽  
Case Crossover ◽  
Crossover Studies ◽  
Analysis Of Time Series
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