Abstract
Ambulance dispatch is a proxy of acute health outcomes, and growing epidemiological evidence documented its relation to extreme temperature events. Research, however, on short-term temperature change and ambulance dispatches is scarce. We aimed to investigate the effect of short-term temperature change on ambulance dispatches and potential modification by season. Daily data on ambulance dispatch and weather factors were collected in Huainan, a Chinese inland city from December 2011 through December 2013. A Poison generalized linear regression model combined with distributed lag nonlinear model was constructed to examine the association of temperature change between neighboring days (TCN) with ambulance dispatches. The effect modification by season was also examined. There were 48,700 ambulance attendances during the study period. A statistically significant association of TCN with ambulance dispatches was observed. Temperature rise between neighboring days (TCN > 0) was associated with elevated adverse risk of ambulance dispatches, and the effects appeared to be acute (lag0, on the current day) and could last for at least a week, while temperature drop between neighboring days (TCN < 0) had a protective effect. For a 1 °C increase of TCN at lag0 and lag06 (on the 7-day moving average), the risk of ambulance dispatches increased by 2 % (95 % CI 1–3 %) and 7 (95 % CI 1–13 %), respectively. Extreme TCN increase (95th percentile, 3.3 °C vs. 0 °C) at lag0 and lag05 was accompanied by 6 (95 % CI 3–8 %) and 27 % (95 % CI 12–44 %) increase in ambulance dispatches. Ambulance dispatches were more vulnerable to extremely great temperature rise in summer and autumn. TCN was adopted for the first time to quantify the impact of short-term temperature change on ambulance dispatches. Temperature drop between neighboring days (TCN < 0) had a protective effect on ambulance dispatches, while temperature rise between neighboring days (TCN > 0) could acutely trigger the increase in ambulance dispatches, and TCN effect differs by season.
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References
Alessandrini E, Zauli Sajani S, Scotto F, Miglio R, Marchesi S, Lauriola P (2011) Emergency ambulance dispatches and apparent temperature: a time series analysis in Emilia–Romagna, Italy. Environ Res 111(8):1192–1200
Bassil KL, Cole DC, Moineddin R, Lou W, Craig AM, Schwartz B, Rea E (2011) The relations hip between temperature and ambulance response calls for heat-related illness in Toronto, Ontario, 2005. J Epidemiol Community Health 65(9):829–831
Belsley DA, Kuh E, RE W (2005) Regression diagnostics: identifying influential data and sources of collinearity, vol 571. Wiley-Interscience, New York
Cheng J, Xu Z, Zhu R, Wang X, Jin L, Song J, Su H (2014a) Impact of diurnal temperature range on human health: a systematic review. Int J Biometeorol 58(9):2011–2024
Cheng J, Zhu R, Xu Z, Xu X, Wang X, Li K, Su H (2014b) Temperature variation between neighboring days and mortality: a distributed lag non-linear analysis. Int J Public Health 59(6):923–931
Faergeman O (2008) Climate change, disease and public health. Ugeskr Laeger 170(35):2667–2668
Gasparrini A, Armstrong B, Kenward MG (2010) Distributed lag non-linear models. Stat Med 29(21):2224–2234
Gasparrini A, Guo Y, Hashizume M, Lavigne E, Zanobetti A, Schwartz J (2015) Mortality risk attributable to high and low ambient temperature: a multi-country study. Lancet 386(9991):369–375
Golden JS, Hartz D, Brazel A, Luber G, Phelan P (2008) A biometeorology study of climate and heat-related morbidity in Phoenix from 2001 to 2006. Int J Biometeorol 52(6):4714–4780
Guo Y, Barnett AG, Yu W, Pan X, Ye X, Huang C, Tong S (2011) A large change in temperature between neighbouring days increases the risk of mortality. PLoS ONE 6(2):e16511
Guo Y, Punnasiri K, Tong S (2012) Effects of temperature on mortality in Chiang Mai city, Thailand: a time series study. Environ Health 11:36
Hansen J, Sato M, Ruedy R (2012) Perception of climate change. Proc Natl Acad Sci U S A 109(37):E2415–E2423
IPCC (2013) Summary for policymakers. In: Climate change 2013: the physical science basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge
Lim YH, Park AK, Kim H (2012) Modifiers of diurnal temperature range and mortality association in six Korean cities. Int J Biometeorol 56(1):33–42
Lin H, Zhang Y, Xu Y, Xu X, Liu T, Luo Y, Xiao J, Wu W, Ma W (2013) Temperature changes between neighboring days and mortality in summer: a distributed lag non-linear time series analysis. PLoS ONE 8(6):e66403
McGeehin MA, Mirabelli M (2001) The potential impacts of climate variability and change on temperature-related morbidity and mortality in the United States. Environ Health Perspect 109(Suppl 2):185–189
Michikawa T, Ueda K, Takeuchi A, Kinoshita M, Hayashi H, Ichinose T, Nitta H (2015) Impact of short-term exposure to fine particulate matter on emergency ambulance dispatches in Japan. J Epidemiol Community Health 69(1):86–91
Ng CF, Ueda K, Ono M, Nitta H, Takami A (2014) Characterizing the effect of summer temperature on heatstroke-related emergency ambulance dispatches in the Kanto area of Japan. Int J Biometeorol 58(5):941–948
Schneider A, Schuh A, Maetzel FK, Ruckerl R, Breitner S, Peters A (2008) Weather-induced ischemia and arrhythmia in patients undergoing cardiac rehabilitation: another difference between men and women. Int J Biometeorol 52(6):535–547
Seposo XT, Dang TN, Honda Y (2015) Evaluating the effects of temperature on mortality in Manila City (Philippines) from 2006 to 2010 using a distributed lag nonlinear model. Int J Environ Res Public Health 12(6):6842–6857
Sun X, Sun Q, Yang M, Zhou X, Li X, Yu A, Geng F, Guo Y (2014) Effects of temperature and heat waves on emergency department visits and emergency ambulance dispatches in Pudong new area, China: a time series analysis. Environ Health 13:76
Turner LR, Connell D, Tong S (2012) Exposure to hot and cold temperatures and ambulance attendances in Brisbane, Australia: a time-series study. BMJ Open 2(4)
Turner LR, Connell D, Tong S (2013) The effect of heat waves on ambulance attendances in Brisbane, Australia. Prehosp Disaster Med 28(5):482–487
Wong HT, Lai PC (2014) Weather factors in the short-term forecasting of daily ambulance calls. Int J Biometeorol 58(5):669–678
Xu Z, Hu W, Tong S (2014) Temperature variability and childhood pneumonia: an ecological study. Environ Health 13(1):51
Ye X, Wolff R, Yu W, Vaneckova P, Pan X, Tong S (2012) Ambient temperature and morbidity: a review of epidemiological evidence. Environ Health Perspect 120(1):19–28
Zanobetti A, O’Neill MS, Gronlund CJ, Schwartz JD (2012) Summer temperature variability and long-term survival among elderly people with chronic disease. Proc Natl Acad Sci U S A 109(17):6608–6613
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This research was funded by Anhui Natural Science Fund (No. 1408085MH159).
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J.C. and H.S. designed this study. J.C. analyzed the data and wrote the first draft. J.C., Z.X., D.Z., M.X., H.Y., L.W., K.L., and H.S. contributed to the manuscript revision.
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Cheng, J., Xu, Z., Zhao, D. et al. Impacts of temperature change on ambulance dispatches and seasonal effect modification. Int J Biometeorol 60, 1863–1871 (2016). https://doi.org/10.1007/s00484-016-1173-4
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DOI: https://doi.org/10.1007/s00484-016-1173-4