Effects of hourly precipitation and temperature on ambulance response time

Zhan, Zhi-Ying; Yu, Yi-Min; Chen, Tingting; Xu, Lijun; An, Shengli; Ou, Chun Quan

doi:10.1016/j.envres.2019.108946

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…In addition, a report from Shenzhen, China, which has a slightly more subtropical climate than our study region, stated that increased precipitation and temperature were associated with longer ambulance response times (measured in hours). 51 Therefore, it should be noted that analysis by hourly stratification may result in differential misclassification of outcomes and possible underestimation.…”

Section: Discussionmentioning

confidence: 99%

Heat Exposure Following the Rainy Season Is Associated With an Increased Risk of Cardiovascular Emergency Among the Elderly in Japan

Fujimoto

Suzuki

Kashima

et al. 2023

JAHA

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Background Despite the impact of heat exposure caused by global warming, few studies have investigated the hourly effects of heat exposure and the risk of cardiovascular disease (CVD) in the elderly. We examined the associations between short‐term heat exposure and the risk of CVD in the elderly in Japan and evaluated possible effect‐measure modifications by rainy seasons that occur in East Asia. Methods and Results We conducted a time‐stratified case–crossover study. The study included 6527 residents in Okayama City, Japan, aged ≥65 years who were transported to emergency hospitals between 2012 and 2019 for the onset of CVD during and a few months after the rainy seasons. We examined the linear associations between temperature and CVD‐related emergency calls for each year and for hourly preceding intervals before the emergency call during the most relevant months. Heat exposure during 1 month after the end of the rainy season was associated with CVD risk; the odds ratio (OR) for a 1° C increase in temperature was 1.34 (95% CI, 1.29–1.40). When we further explored the nonlinear association by using the natural cubic spline model, we found a J‐shaped relationship. Exposures 0 to 6 hours before the case event (preceding intervals 0–6 hours) were associated with CVD risk, particularly for the preceding interval 0 to 1 hour (OR, 1.33 [95% CI, 1.28–1.39]). For longer periods, the highest risk was at preceding intervals 0 to 23 hours (OR, 1.40 [95% CI, 1.34–1.46]). Conclusions Elderly individuals may be more susceptible to CVD after heat exposure during the month after the rainy season. As shown by finer temporal resolution analyses, short‐term exposure to increasing temperature can trigger CVD onset.

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Section: Discussionmentioning

confidence: 99%

Heat Exposure Following the Rainy Season Is Associated With an Increased Risk of Cardiovascular Emergency Among the Elderly in Japan

Fujimoto

Suzuki

Kashima

et al. 2023

JAHA

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“…In the study of Yannis and Karlaftis [28], an integer autoregressive (INAR) model is used to estimate the effects of weather conditions on different traffic safety categories, and mean daily precipitation height along with its lagged value (1 day) was proved to be the most consistently significant and influential variable. Combining quantile regression with distributed-lag nonlinear models, Zhan et al [34] examined the nonlinear and lagged effects of hourly precipitation and temperature on ambulance response time (ART) at the 50th and 90th percentiles and found that marginal temperature and precipitation have different degrees of lag effects on ART. Zhang et al [35] proposed an impulse response function based on the vector autoregression model to provide insight into the cross effects of the traffic parameters and their responses to weather conditions.…”

Section: Introductionmentioning

confidence: 99%

How Snowfalls Affect the Operation of Taxi Fleets? A Case Study from Harbin, China

Li¹,

Cai

Dan

2022

Journal of Advanced Transportation

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Taxi network plays an important role in urban passenger transportation. However, its operation is greatly affected by weather, especially by snowfalls in cold region. In this study, we focus on the persistent effect of snowfall on taxi operation and propose an autoregressive distribution lag model (ARDL) to quantitatively analyse it. To support our study, the taxi GPS trajectory data collected in Harbin, China, during 61 days from 1 November to 31 December in 2015 is analysed. First, the daily average order volume (DAOV) is acquired through data sampling and processing. Then, combined with the data of daily snowfall during the 61 days, the ARDL model is constructed. The result shows that the snowfall has a lag effect on taxi operation and it lasts about 3 days. To better interpret the result, visualization of total 6 days before and after a heavy snowfall is conducted. The result also indicates that weekends have a positive effect on operation. These results are expected to assist us to better understand the effect of snowfall on taxi operation and provide some policy suggestions for local municipal and transportation management departments to ensure the normal operation of taxi networks.

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“…In addition, each province has set strict time limits for pre-hospital emergency response procedures; for example, a general hospital must dispatch an ambulance within three minutes after receiving an emergency order. And both ambulance personnel and dispatchers were required to record detailed data for each prehospital emergency separately(Zhan et al, 2020), and government departments monitored the response time for each emergency. (Huang et al, 2020).…”

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confidence: 99%

Which is better? Comparing the efficiency and information accuracy of pre-hospital emergency medical services (PEMS) dispatch in two call modes in Sichuan Province, China: a retrospective study

luo¹,

Liu

Li³

et al. 2022

Preprint

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Background China's PEMS system was established in the 1980s. Due to economic and resource inequalities, China's PEMS system does not have a uniform mode, and regions developed their models based on their circumstances, incorporating North America’s and Europe’s experiences. In the Sichuan PEMS model, when someone calls "120" for a pre-hospital emergency, he/she will first access the Medical Emergency Center, a dispatcher will record the incident information and makes a preliminary judgment, then that information and the judgment will be forwarded to a nearby general hospital, which will send an ambulance staffed by medical workers to provide PEMS. Instead, some people prefer to call hospitals directly for pre-hospital emergencies and communicate directly with medical staff. Which call mode is better has long been a point of contention. Methods This retrospective study included a total of 496 PEMS within 8 km of the participating hospital between 2020 and 2021. Cases that called the Emergency Medical Center dispatcher were classified as "referral group" (n = 318) and cases that called the hospital and communicated directly with medical personnel were classified as "direct group" (n = 178), and appropriate metrics were selected to measure efficiency and information accuracy Results There was no significant difference in the efficiency of PEMS between the two groups, but there was a notable difference in the information accuracy between the two groups on all indicators Conclusion Compared with calling ‘120’, direct PEMS calls to general hospitals have obvious advantages in terms of information accuracy. Perhaps the Emergency Medical Center in Sichuan could try to reform as a supervisory agency for PEMS instead of a dispatch agency or adopt the Shenzhen EMS model where the Emergency Medical Center, after receiving a call for help, transfers the call to the appropriate hospital based on the caller's location and situation, allowing the caller to communicate directly with medical personnel.

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Effects of hourly precipitation and temperature on ambulance response time

Cited by 5 publications

References 21 publications

Heat Exposure Following the Rainy Season Is Associated With an Increased Risk of Cardiovascular Emergency Among the Elderly in Japan

Heat Exposure Following the Rainy Season Is Associated With an Increased Risk of Cardiovascular Emergency Among the Elderly in Japan

How Snowfalls Affect the Operation of Taxi Fleets? A Case Study from Harbin, China

Which is better? Comparing the efficiency and information accuracy of pre-hospital emergency medical services (PEMS) dispatch in two call modes in Sichuan Province, China: a retrospective study

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