TY - JOUR
T1 - Impact of ambient temperature, diurnal temperature range on hyperventilation syndrome emergency admission
T2 - a time-series analysis in Beijing, China
AU - Wang, Jianping
AU - Zhang, Yongming
AU - Liu, Xuan
AU - Li, Xuan
AU - Zhao, Qi
AU - Zhao, Jinhua
AU - Ni, Ying
AU - Guo, Yuming
AU - Cui, Zhuang
AU - Zhang, Wenyi
AU - Li, Changping
N1 - Funding Information:
The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for- profit sectors.
Publisher Copyright:
© 2024 Author(s) (or their employer(s)).
PY - 2024/1
Y1 - 2024/1
N2 - Objectives To assess the association between ambient temperature and diurnal temperature range (DTR) on emergency admissions for hyperventilation syndrome (HVS). Design Distributed lag non-linear model design was used with a lag time to 5 days. Setting Emergency admission data used were from the Beijing Red Cross Emergency Centre (2017.2018). Participants and exposure Cases were those with emergency visits to the Beijing Emergency Center during the period 2017.2018 and who were given the primary outcome indicator defined as HVS according to the International Classification of Diseases, 10th edition code F45.303. Ambient temperature and DTR were used as exposure factors with adjustments for relative humidity, wind speed, precipitation, seasonality long-term trend and day of the week. Main outcome measure We used the minimum emergency visits temperature as a reference to indicate the relative risk with 95% CI of exposure.response for the risk of HVS visits at different temperatures. Results A u-shape was described between ambient temperature and HVS visits, with a minimum risk at 12°C. Moderate heat (23°C) at lag (0.3) days, extreme heat at lag 0 days, had greatest relative risks on HVS visits, with 2.021 (95% CI 1.101 to 3.71) and 1.995 (95% CI 1.016 to 3.915), respectively. A stronger association between HVS visits and temperature was found in women and aged .44 years. Notably, the relationship between DTR and HVS visits appeared a reverse u-shaped. Low DTR (4°C) effect appeared at lag (0.1) days with 0.589 (95% CI 0.395 to 0.878), lasting until lag (0.3) days with 0.535 (95% CI 0.319 to 0.897) and was associated with a reduced risk of HVS visits in women and those aged .44 years. Conclusions Ambient temperature and DTR were associated with HVS visits, appearing a differentiation in gender and age groups. Timely prevention strategies during high temperatures and control mild changes in temperature might reduce the risk of HVS.
AB - Objectives To assess the association between ambient temperature and diurnal temperature range (DTR) on emergency admissions for hyperventilation syndrome (HVS). Design Distributed lag non-linear model design was used with a lag time to 5 days. Setting Emergency admission data used were from the Beijing Red Cross Emergency Centre (2017.2018). Participants and exposure Cases were those with emergency visits to the Beijing Emergency Center during the period 2017.2018 and who were given the primary outcome indicator defined as HVS according to the International Classification of Diseases, 10th edition code F45.303. Ambient temperature and DTR were used as exposure factors with adjustments for relative humidity, wind speed, precipitation, seasonality long-term trend and day of the week. Main outcome measure We used the minimum emergency visits temperature as a reference to indicate the relative risk with 95% CI of exposure.response for the risk of HVS visits at different temperatures. Results A u-shape was described between ambient temperature and HVS visits, with a minimum risk at 12°C. Moderate heat (23°C) at lag (0.3) days, extreme heat at lag 0 days, had greatest relative risks on HVS visits, with 2.021 (95% CI 1.101 to 3.71) and 1.995 (95% CI 1.016 to 3.915), respectively. A stronger association between HVS visits and temperature was found in women and aged .44 years. Notably, the relationship between DTR and HVS visits appeared a reverse u-shaped. Low DTR (4°C) effect appeared at lag (0.1) days with 0.589 (95% CI 0.395 to 0.878), lasting until lag (0.3) days with 0.535 (95% CI 0.319 to 0.897) and was associated with a reduced risk of HVS visits in women and those aged .44 years. Conclusions Ambient temperature and DTR were associated with HVS visits, appearing a differentiation in gender and age groups. Timely prevention strategies during high temperatures and control mild changes in temperature might reduce the risk of HVS.
UR - https://www.scopus.com/pages/publications/85185855020
U2 - 10.1136/bmjopen-2023-080318
DO - 10.1136/bmjopen-2023-080318
M3 - Article
C2 - 38388503
AN - SCOPUS:85185855020
SN - 2044-6055
VL - 14
JO - BMJ Open
JF - BMJ Open
IS - 2
M1 - e080318
ER -