Background: The effect of short-term exposure to fine particulate matter (PM2.5) on the incidence of acute noncardiovascular critical illnesses (ANCIs) and clinical outcomes is unknown in patients with acute cardiovascular diseases.
Methods: We conducted a retrospective study in 2,337 admissions to an intensive cardiac care unit (ICCU) from June 2016 to May 2017. We used the 2-day average PM2.5 concentration before ICCU admission to estimate the individual exposure level, and patients were divided into 3 groups according to the concentration tertiles. Major ANCI was defined as the composite of acute respiratory failure, acute kidney injury, gastrointestinal hemorrhage, or sepsis. The primary endpoint was all-cause death or discharge against medical advice in extremely critical condition.
Results: More than 20 percent of admissions were complicated by major ANCI, and primary endpoints occurred in 7.6% of patients during their hospitalization. The association of short-term PM2.5 exposure levels with the incidence of acute respiratory failure (adjusted OR [odds ratio] =1.31, 95%CI [confidence interval]1.12-1.54) and acute kidney injury (adjusted OR=1.20, 95%CI 1.02-1.41) showed a significant trend. Additionally, there were numerically more cases of sepsis (adjusted OR=1.21, 95%CI 0.92-1.60) and gastrointestinal hemorrhage (adjusted OR=1.29, 95%CI 0.94-1.77) in patients with higher exposure levels. After further multivariable adjustment, short-term PM2.5 exposure levels were still significantly associated with the incidence of major ANCI (adjusted OR=1.32, 95%CI 1.12-1.56), as well as with in-hospital outcomes (adjusted OR=1.52, 95%CI 1.09-2.12).
Conclusion: Short-term PM2.5 exposure before ICCU admission was associated with an increased risk of incident major ANCI and worse in-hospital outcomes in patients receiving intensive cardiac care.
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On 21 Apr, 2020
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Received 24 Feb, 2020
On 13 Feb, 2020
On 06 Jan, 2020
Invitations sent on 06 Jan, 2020
On 06 Jan, 2020
On 31 Dec, 2019
On 30 Dec, 2019
On 11 Dec, 2019
On 21 Apr, 2020
Received 20 Apr, 2020
On 30 Mar, 2020
Received 29 Mar, 2020
Invitations sent on 29 Mar, 2020
On 29 Mar, 2020
On 08 Mar, 2020
On 07 Mar, 2020
On 07 Mar, 2020
Posted 03 Jan, 2020
On 25 Feb, 2020
Received 24 Feb, 2020
Received 24 Feb, 2020
On 13 Feb, 2020
On 06 Jan, 2020
Invitations sent on 06 Jan, 2020
On 06 Jan, 2020
On 31 Dec, 2019
On 30 Dec, 2019
On 11 Dec, 2019
Background: The effect of short-term exposure to fine particulate matter (PM2.5) on the incidence of acute noncardiovascular critical illnesses (ANCIs) and clinical outcomes is unknown in patients with acute cardiovascular diseases.
Methods: We conducted a retrospective study in 2,337 admissions to an intensive cardiac care unit (ICCU) from June 2016 to May 2017. We used the 2-day average PM2.5 concentration before ICCU admission to estimate the individual exposure level, and patients were divided into 3 groups according to the concentration tertiles. Major ANCI was defined as the composite of acute respiratory failure, acute kidney injury, gastrointestinal hemorrhage, or sepsis. The primary endpoint was all-cause death or discharge against medical advice in extremely critical condition.
Results: More than 20 percent of admissions were complicated by major ANCI, and primary endpoints occurred in 7.6% of patients during their hospitalization. The association of short-term PM2.5 exposure levels with the incidence of acute respiratory failure (adjusted OR [odds ratio] =1.31, 95%CI [confidence interval]1.12-1.54) and acute kidney injury (adjusted OR=1.20, 95%CI 1.02-1.41) showed a significant trend. Additionally, there were numerically more cases of sepsis (adjusted OR=1.21, 95%CI 0.92-1.60) and gastrointestinal hemorrhage (adjusted OR=1.29, 95%CI 0.94-1.77) in patients with higher exposure levels. After further multivariable adjustment, short-term PM2.5 exposure levels were still significantly associated with the incidence of major ANCI (adjusted OR=1.32, 95%CI 1.12-1.56), as well as with in-hospital outcomes (adjusted OR=1.52, 95%CI 1.09-2.12).
Conclusion: Short-term PM2.5 exposure before ICCU admission was associated with an increased risk of incident major ANCI and worse in-hospital outcomes in patients receiving intensive cardiac care.
Figure 1
Figure 2
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