Effect of Climatic Factors on the Seasonal Fluctuation of Pulmonary Embolism

NCT ID: NCT04419194

Last Updated: 2020-06-05

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 10000 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2014-07-31
• Study Completion Date: 2019-07-31

Brief Summary

To estimate the risks of daily hospital admissions for pulmonary embolism associated with short term exposure to climatic factors (temperature, precipitation, air pressure, sunshine duration, relative humidity, wind speed, and ambient fine particulate matter [aerodynamic diameter ≤2.5 μm; PM2.5]) in China.

Detailed Description

Hospital admissions for pulmonary embolism were identified based on the primary diagnosis. The central adjudication committee at Peking Union Medical College Hospital (Beijing, China) reviewed all medical and death records and determined the final diagnosis. Two adjudication committee members verified events independently, and discrepancies were resolved by discussion involving additional committee members.For each admission, we extracted data on the date of admission, sex, age, and location of the patient from hospital information system.

All the data of daily meteorological variables for the same period, including temperature variables (°C) (the min, max and mean temperature), relative humidity (%), air pressure (hPa), precipitation (mm), wind speed (m/s) and sunshine duration (h), were collected from the China Meteorological Data Sharing Service System (http://www.escience.gov.cn/metdata/page/index.html). The data on PM2.5 levels in each city was collected from the National Air Pollution Monitoring System.

An overdispersed generalised additive model was used to estimate associations between climatic factors and pulmonary embolism admissions. A distributed lag non-linear model (DLNM) was employed to examine their lagged effects.

Conditions

Pulmonary Embolism

Study Design

• Observational Model Type: CASE_CROSSOVER
• Study Time Perspective: RETROSPECTIVE

Study Groups

Observation

Observation

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• Males and females.
• With a primary diagnosis of pulmonary embolism based on clinical symptoms, with or without radiologic features.

Exclusion Criteria

• Lack of important data.

• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Peking Union Medical College Hospital

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Shi Juhong, M.D

Role: STUDY_CHAIR

Peking Union Medical College Hospital

Locations

Peking Union Medical College Hospital

Beijing, Beijing Municipality, China

Countries

China

Other Identifiers

PUMCH-PE-Climatic factors

Identifier Type: -

Identifier Source: org_study_id