Study on the Correlation between Temperature and Chronic Obstructive Pulmonary Disease in Shijiazhuang, China—Retrospective Cohort

Abstract

Using the chronic obstructive pulmonary disease (COPD) medical records from January 1st to December 31st of 2013 and the Meteorological observation data, the air pollution data in the same time periods, generalized additive models were used to quantitatively analyze the relationship between COPD hospitalizations and temperature with controlling the confounding effects of time trend, meteorological factors and air pollution index (AQI). Results showed: variable temperature in 24 h (BT), 3d lagged minimum temperature (Tm3) and 5d lagged diurnal maximum temperature and minimum temperature range (Tc5) have different effects on COPD hospitalizations. When BT is between −4.4˚C and −0.7˚C, the relative risk (RR) increases to 1.0207 (95% CI: 1.0074 -1.0342）with every 1˚C increase in BT; when Tm3 is between −3.6˚C and 3.2˚C, the relative risk (RR) increases to 1.0118 (95% CI: 1.0015 -1.0222） with every 1˚C increase in Tm3, and when Tm3 is greater than 20.5˚C, the relative risk (RR) increases to 1.0069 (95% CI: 1.0005 -1.0133) with every 1˚C increase in Tm3; when Tc5 is between 0.9˚C and 8.6˚C, if the Tc5 increases 1˚C, the relative risk (RR) increases to 1.0125 (95% CI: 1.0066 -1.0185. There are different effects for weather in different seasons on COPD hospitalizations: in autumn and winter, it is mainly of little BT and heavy air pollution weather; in spring, the large Tc5 weather is a main feature, and in summer, it's mainly of high temperature and low pressure weather. The results help to provide some guidance on COPD forecasting services.

Impact of High-Density Urban Built Environment on Chronic Obstructive Pulmonary Disease: A Case Study of Jing’an District, Shanghai

“…Most studies addressing the association between the environment and COPD have mainly focused on the variation of socio-economic environments [54] and natural environments such as altitude [55], temperature [56], and humidity [57]. Little has been reported yet on how urban-built environment exposure can influence individuals' respiratory health.…”