The relationship between diurnal temperature range and COPD hospital admissions in Changchun, China

2018 ◽  
Vol 25 (18) ◽  
pp. 17942-17949 ◽  
Author(s):  
Yuxia Ma ◽  
Yuxin Zhao ◽  
Jianding Zhou ◽  
Yunyan Jiang ◽  
Sixu Yang ◽  
...  
Keyword(s):  
Diurnal Temperature Range ◽  
Hospital Admissions ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
The Relationship

scholarly journals Association of diurnal temperature range with daily hospitalization for exacerbation of chronic respiratory diseases in 21 cities, China

2020 ◽  
Author(s):  
Zihui Wang ◽  
Yumin Zhou ◽  
Ming Luo ◽  
Huajing Yang ◽  
Shan Xiao ◽  
...  
Keyword(s):  
Diurnal Temperature Range ◽  
Respiratory Diseases ◽  
Hospital Admissions ◽  
Cold Season ◽  
Population Characteristics ◽  
Chronic Respiratory Diseases ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Hot Season ◽  
Daily Hospitalization

Abstract Background: The association between diurnal temperature range (DTR) and hospitalization for exacerbation of chronic respiratory diseases (CRD) was rarely reported. Objectives: To examine the association between DTR and daily hospital admission for exacerbations of CRD and find out the potential effect of modifications on this association.Method: Data on daily hospitalization for exacerbation of chronic obstructive pulmonary disease (COPD), asthma and bronchiectasis and meteorology measures from 2013 through 2017 were obtained from 21 cities in South China. After controlling the effects of daily mean temperature, relative humidity (RH), particulate matter < 2.5 µm diameter (PM2.5) and other confounding factors, a standard generalized additive model (GAM) with a quasi-Poisson distribution was performed to evaluate the relationships between DTR and daily hospital admissions of CRD in a two-stage strategy. Subgroup analysis was performed to find potential modifications, including seasonality and population characteristics.Result: Elevated risk of hospitalization for exacerbation of CRD (RR=1.09 [95%CI: 1.08 to 1.11]) was associated with interquartile range (IQR) increase in DTR. The effects of DTR on hospital admissions for CRD were strong at low DTR in the hot season and high DTR in the cold season. The relative risk (RR) of hospitalization was 1.11 (95%CI: 1.08 to 1.12) for exacerbations of COPD and 1.09 (95%CI: 1.05 to 1.13) for asthma per IQR increase in DTR. The adverse effect of DTR on hospitalization for bronchiectasis was only observed in female patients (RR=1.06 [95%CI: 1.03 to 1.10]). Conclusion: Our study provided additional evidence for the association between DTR and daily hospitalization for exacerbation of CRD, and these associations are especially stronger in COPD patients and in the cold season than the hot season. Preventive measures to reduce the adverse impacts of DTR were needed for CRD patients.

scholarly journals Association of diurnal temperature range with daily hospitalization for exacerbation of chronic respiratory diseases in 21 cities, China

2020 ◽  
Author(s):  
Zihui Wang ◽  
Yumin Zhou ◽  
Ming Luo ◽  
Huajing Yang ◽  
Shan Xiao ◽  
...  
Keyword(s):  
Diurnal Temperature Range ◽  
Respiratory Diseases ◽  
Hospital Admissions ◽  
Cold Season ◽  
Population Characteristics ◽  
Chronic Respiratory Diseases ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Hot Season ◽  
Daily Hospitalization

Abstract Background: The association between diurnal temperature range (DTR) and hospitalization for exacerbation of chronic respiratory diseases (CRD) was rarely reported. Objectives: To examine the association between DTR and daily hospital admission for exacerbations of CRD and find out the potential effect of modifications on this association.Method: Data on daily hospitalization for exacerbation of chronic obstructive pulmonary disease (COPD), asthma and bronchiectasis and meteorology measures from 2013 through 2017 were obtained from 21 cities in South China. After controlling the effects of daily mean temperature, relative humidity (RH), particulate matter < 2.5 µm diameter (PM2.5) and other confounding factors, a standard generalized additive model (GAM) with a quasi-Poisson distribution was performed to evaluate the relationships between DTR and daily hospital admissions of CRD in a two-stage strategy. Subgroup analysis was performed to find potential modifications, including seasonality and population characteristics.Result: Elevated risk of hospitalization for exacerbation of CRD (RR=1.09 [95%CI: 1.08 to 1.11]) was associated with interquartile range (IQR)the increase in DTR (the 75th percentile versus the 25th percentile of DTR at lag0-6). The effects of DTR on hospital admissions for CRD were strong at low DTR in the hot season and high DTR in the cold season. The relative risk (RR (the 75th percentile versus the 25th percentile of DTR at lag0-6)) of hospitalization was 1.11 (95%CI: 1.08 to 1.12) for exacerbations of COPD and 1.09 (95%CI: 1.05 to 1.13) for asthma per IQR increase in DTR. The adverse effect of DTR on hospitalization for bronchiectasis was only observed in female patients (RR=1.06 [95%CI: 1.03 to 1.10]). Conclusion: Our study provided additional evidence for the association between DTR and daily hospitalization for exacerbation of CRD, and these associations are especially stronger in COPD patients and in the cold season than the hot season. Preventive measures to reduce the adverse impacts of DTR were needed for CRD patients.

scholarly journals Impact of Diurnal Temperature Range on Cardiovascular Disease Hospital Admissions among Chinese Farmers in Dingxi(the Northwest China)

2021 ◽  
Author(s):  
Jintao Qi ◽  
Guangyu Zhai ◽  
Guorong Chai
Keyword(s):  
Cardiovascular Disease ◽  
Rural Areas ◽  
Diurnal Temperature Range ◽  
Hospital Admissions ◽  
Meteorological Data ◽  
Northwest China ◽  
Gansu Province ◽  
Cvd Risk ◽  
Diurnal Temperature ◽  
Temperature Range

Abstract Background: Diurnal temperature range (DTR), an important index of climate change, has been widely applied in exploring its effect on cardiovascular disease (CVD). However, few studies have investigated the correlations between DTR and CVD in poor rural areas in China. Methods: Therefore, using a distributed lag nonlinear model and a Poisson regression model, we evaluated this relationship among farmers living in the city of Dingxi (Northwest China). From 2016 to 2019, we obtained outpatient visits for CVD and meteorological data from the New Rural Cooperative Medical Insurance of Gansu Province (NRCMI) and Meteorological Science Data Sharing Service, respectively. The effects of DTR were examined in subgroups stratified by gender and age. Results: We observed nonlinear M-patterns between DTR and CVD hospitalizations among all subgroups when DTR was at the median level (13°C). Estimated effect of a relatively low DTR (5th percentile, 4°C) on the hospital admissions of CVD was stronger than the effect of a relatively high DTR (95th percentile, 19°C). We also found that the adverse effect of DTR on CVD risk was more pronounced in females and elderly than males and younger adults at the low DTR, and vice versa at the high DTR. Conclusions: These results could guide the local authorities to improve CVD preventive strategies in the rural areas.

scholarly journals A Comparison of The Effect of Diurnal Temperature Range And Apparent Temperature On Cardiovascular Disease Among Farmers In Qingyang, Northwest China

2021 ◽  
Author(s):  
Guangyu Zhai ◽  
Jintao Qi ◽  
Xuemei Zhang ◽  
Wenjuan Zhou ◽  
Jiancheng Wang
Keyword(s):  
Cardiovascular Disease ◽  
Rural Areas ◽  
Diurnal Temperature Range ◽  
Hospital Admissions ◽  
Northwest China ◽  
Gansu Province ◽  
Apparent Temperature ◽  
Science Data ◽  
Diurnal Temperature ◽  
Temperature Range

Abstract Background: Apparent temperature (AT) and diurnal temperature range (DTR) have been extensively used to evaluate the effects of temperature on cardiovascular disease (CVD). However, few studies have analyzed and compared their effects on CVD in less-developed, rural areas of China.Methods: A case-only analysis was conducted of 43,567 cases of CVD morbidity in Qingyang (Northwest China) in 2011–2017 and the effects of thermal indicators were assessed using distributed lag nonlinear modelling and a Poisson regression model. Data on CVD morbidity originated from the New Rural Cooperative Medical Insurance of Gansu Province and meteorological variables were provided by the Meteorological Science Data Sharing Service.Results: Both AT and DTR had significant nonlinear and delayed impacts on hospital admissions for CVD. DTR had a stronger and more persistent effect on CVD incidence than AT. Women were more affected by high AT and low DTR than were men, while men were more vulnerable to low AT and high DTR. Temperature effects were not significantly different between people above and below 65 years of age.Conclusions: These findings provide local public health authorities with reference data concerning sensitive temperature indices for susceptible populations with a view to improving CVD preventive strategies in rural areas.

The Relationship between Diurnal Temperature Range (DTR) and Rainfall over Northern Thailand

2014 ◽  
Vol 931-932 ◽  
pp. 614-618
Author(s):  
Lukas Beule ◽  
Sarintip Tantanee
Keyword(s):  
Diurnal Temperature Range ◽  
Surface Air Temperature ◽  
Lag Time ◽  
Maximum Temperature ◽  
Northern Thailand ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Rainfall Prediction ◽  
The Impact ◽  
The Relationship

Since 1950, it has been found that the global diurnal temperature range (DTR), the difference between the minimum temperature (Tmin) and the maximum temperature (Tmax) of daily surface air temperature, has been temporally decreasing in several places all over the world. The aim of this study is to investigate the effect of DTR on the amount of total monthly rainfall (TRF) and the number of rainy days per month (RD), as well as to evaluate the possibility of using DTR as a parameter in the rainfall prediction process. The study area is in northern Thailand, which covers about one third of the total area of the country. The impact of DTR on rainfall over the studied area is evaluated from the relationship between DTR and TRF, as well as DTR and RD, by using long-term meteorological monthly data over 30 years (1978-2007). Besides, the relationships of RD, TRF, and the temperature of mean monthly Tmax and Tmin are also analysed. The significance of the correlation between the two parameters is identified by the coefficient of correlation. The possibility of using DTR is evaluated by estimating the relationships between DTR and a one month-lag time of RD and TRF. It is found that the DTR has a strong statistically significant ( > 99%) negative correlation with TRF and RD, as well as with the one month-lag time of TRF and RD. Therefore, it is possible to consider DTR as a significant parameter for rainfall prediction.

scholarly journals Impact of diurnal temperature range on cardiovascular disease hospital admissions among Chinese farmers in Dingxi (the Northwest China)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Guangyu Zhai ◽  
Jintao Qi ◽  
Guorong Chai
Keyword(s):  
Cardiovascular Disease ◽  
Rural Areas ◽  
Diurnal Temperature Range ◽  
Hospital Admissions ◽  
Rural China ◽  
Northwest China ◽  
Cvd Risk ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Distributed Lag

Abstract Background Diurnal temperature range (DTR) has been widely applied in exploring its effect on cardiovascular disease (CVD). However, few studies have investigated the correlations between DTR and CVD in poor rural areas in China. This study aimed to examine the association between DTR and CVD in rural China. Methods A distributed lag nonlinear model was used to evaluate the relationship between DTR and CVD risk among farmers living in the city of Dingxi (Northwest China) in the period from January 1, 2016 to December 31, 2019. Results We observed nonlinear M-patterns between the relative risk (RR) of DTR (reference: median DTR, 12 °C) and CVD hospitalizations in all subgroups. The peak RR of CVD was noticed at DTR of 6 °C (total: 1.418; men: 1.546; women: 1.403; young: 1.778; old: 2.549) and 17 °C (total: 1.781; men: 1.937; women: 1.712; young: 2.233; old: 1.798). The adverse effect of DTR on CVD risk was more pronounced in females (RR 1.438) and elderly (RR 2.034) than males (RR 1.141) and younger adults (RR 1.852) at the extremely low (5th, 4 °C) DTR. The reverse was observed at the extremely high DTR (95th, 19 °C) (male: 1.267; females: 0.993; young: 1.586; old: 1.212). Conclusions DTR is associated with CVD morbidity. This association was more pronounced in women and elderly, but men and younger peoples at extremely high DTR (19 °C). Future measures should take DTR into account to prevent CVD among susceptible populations.

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