Joana Gomes1, Albertino Damasceno2, Carla Carrilho3, Vitória Lobo3, Hélder Lopes3, Tavares Madede3, Pius Pravinrai3, Carla Silva-Matos3, Domingos Diogo3, Ana Azevedo4, Nuno Lunet4. 1. Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal; Institute of Public Health, University of Porto (ISPUP), Porto, Portugal. Electronic address: joanacostabgomes@hotmail.com. 2. Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal; Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique. 3. Faculty of Medicine, Eduardo Mondlane University, Maputo, Mozambique. 4. Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal; Institute of Public Health, University of Porto (ISPUP), Porto, Portugal.
Abstract
OBJECTIVES: The effect of ambient temperature as a stroke trigger is likely to differ by type of stroke and to depend on non-transient exposures that influence the risk of this outcome. We aimed to quantify the association between ambient temperature variation and stroke, according to clinical characteristics of the events, and other risk factors for stroke. METHODS: We conducted a case-crossover study based on a 1-year registry of the hospital admissions due to newly occurring ischemic and hemorrhagic stroke events in Maputo, Mozambique's capital city (N=593). The case-period was defined as the 7 days before the stroke event, which was compared to two control periods (14-21 days and 21-28 days before the event). We computed humidity- and precipitation-adjusted odds ratios (OR) and 95% confidence intervals (95%CI) using conditional logistic regression. RESULTS: An association between minimum temperature declines higher than 2.4 °C in any two consecutive days in the previous week and the occurrence of stroke was observed only for first events (OR=1.43, 95%CI: 1.15-1.76). Stronger and statistically significant associations were observed for hemorrhagic stroke (OR=1.50, 95%CI: 1.07-2.09) and among subjects not exposed to risk factors, including smoking, high serum cholesterol or atrial fibrillation. No differences in the effect of temperature were found according to the patients' vital status 28 days after the event. CONCLUSIONS: First stroke events, especially of the hemorrhagic type, were triggered by declines in the minimum temperature between consecutive days of the preceding week.
OBJECTIVES: The effect of ambient temperature as a stroke trigger is likely to differ by type of stroke and to depend on non-transient exposures that influence the risk of this outcome. We aimed to quantify the association between ambient temperature variation and stroke, according to clinical characteristics of the events, and other risk factors for stroke. METHODS: We conducted a case-crossover study based on a 1-year registry of the hospital admissions due to newly occurring ischemic and hemorrhagic stroke events in Maputo, Mozambique's capital city (N=593). The case-period was defined as the 7 days before the stroke event, which was compared to two control periods (14-21 days and 21-28 days before the event). We computed humidity- and precipitation-adjusted odds ratios (OR) and 95% confidence intervals (95%CI) using conditional logistic regression. RESULTS: An association between minimum temperature declines higher than 2.4 °C in any two consecutive days in the previous week and the occurrence of stroke was observed only for first events (OR=1.43, 95%CI: 1.15-1.76). Stronger and statistically significant associations were observed for hemorrhagic stroke (OR=1.50, 95%CI: 1.07-2.09) and among subjects not exposed to risk factors, including smoking, high serum cholesterol or atrial fibrillation. No differences in the effect of temperature were found according to the patients' vital status 28 days after the event. CONCLUSIONS: First stroke events, especially of the hemorrhagic type, were triggered by declines in the minimum temperature between consecutive days of the preceding week.
Authors: Kathryn C Conlon; Nicholas B Rajkovich; Jalonne L White-Newsome; Larissa Larsen; Marie S O'Neill Journal: Maturitas Date: 2011-05-17 Impact factor: 4.342
Authors: María Cristina Zurrú; Claudia Alonzo; Laura Brescacín; Marina Romano; Luis Alberto Cámera; Gabriel Waisman; Edgardo Cristiano; Bruce Ovbiagele Journal: Stroke Date: 2009-04-09 Impact factor: 7.914
Authors: Danni Zheng; Hisatomi Arima; Shoichiro Sato; Antonio Gasparrini; Emma Heeley; Candice Delcourt; Serigne Lo; Yining Huang; Jiguang Wang; Christian Stapf; Thompson Robinson; Pablo Lavados; John Chalmers; Craig S Anderson Journal: PLoS One Date: 2016-02-09 Impact factor: 3.240
Authors: Xia Wang; Yongjun Cao; Daqing Hong; Danni Zheng; Sarah Richtering; Else Charlotte Sandset; Tzen Hugh Leong; Hisatomi Arima; Shariful Islam; Abdul Salam; Craig Anderson; Thompson Robinson; Maree L Hackett Journal: Int J Environ Res Public Health Date: 2016-07-12 Impact factor: 3.390
Authors: Yang Shen; Xudong Zhang; Cai Chen; Qianqian Lin; Xiyuan Li; Wenxiu Qu; Xuejian Liu; Li Zhao; Shijie Chang Journal: Environ Sci Pollut Res Int Date: 2021-01-06 Impact factor: 5.190