Seasonal Differences and Circadian Variation in Stroke Occurrence and Stroke Subtypes

Raj, Kishan; Bhatia, Rohit; Prasad, Kameshwar; Srivastava, M. V. Padma; Vishnubhatla, Sreenivas; Singh, Mamta Bhushan

doi:10.1016/j.jstrokecerebrovasdis.2014.07.051

Cited by 47 publications

(44 citation statements)

References 36 publications

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“…In our study, male preponderance (male 62%, female 38%) was observed as with other studies by Raj K et al 2 showing male preponderance (male 71%, female 29%). 3 Similar was observed in a study by Miah et al 4 The prevalence of stroke in our study is more in patients aged between 50-65 years (46%).…”

Section: Discussionsupporting

confidence: 90%

Patient Demographic, Risk Factors and Seasonal Variation in Onset of Stroke

M¹,

D²,

Sreenivas³

2016

jebmh

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BACKGROUNDExistence of particular chronobiological pattern in onset of acute cerebrovascular diseases characterised by circannual rhythms has been detected. India is a subtropical country with clear seasonal variations in weather conditions. Stroke causes death and disability worldwide. Seasons may influence stroke occurrence. The mechanisms underlying these seasonal variations of stroke are not fully understood, but a possible reason may include seasonal variation of biological factors such as arterial blood pressure, serum lipid levels and other blood components. Better understanding and controlling of risk factors associated with onset of stroke will improve the disease prevention. The objective of the present study is to examine the role of possible precipitating or triggering factors. This study reviews records of patients with stroke attending the Department of Medicine, KGH, Visakhapatnam. MATERIALS AND METHODSPatients with diagnosis of stroke attending the Department of Medicine, KGH, Visakhapatnam, were selected. Computed tomographic types of stroke, both ischaemic and haemorrhagic and risk factors associated were considered with tropical seasonal variation. RESULTSA total of 150 stroke patients were included in the study of which 93 (62%) were males, 57 (38%) were females and 46% in 50-65 years age group, 4% in 20-35 years, 28% in 35-50 years, 22% in 65-80 years and above age groups. Of the total, 93.33% presented with 1 st attack and only 6.66% presented with recurrent stroke. The prevalence of types of stroke was: ischaemic stroke 54.66%, haemorrhagic stroke 45.33%. The prevalence of risk factors associated with stroke was -male gender 62%, smoking 56.66%, hypertension 56%, age >50 years 46%, alcohol consumption 43%, hyperlipidaemia 16.66%, consumption of alcohol and smoking together 13.33%, valvular heart diseases 6.66%. A high seasonal prevalence was observed in winter season (50.66%). CONCLUSIONThis study revealed that male gender, smoking, uncontrolled systemic hypertension, elderly age, excessive alcohol consumption and hyperlipidaemia are major risk factors. Further, it showed high seasonal prevalence of stroke during winter season. With better understanding of demographic and risk factors, we can prevent the disease at an early stage and reduce the global burden of disease worldwide. HOW TO CITE THIS ARTICLE:Kathyayani MKM, Babu DV, Sreenivas S. Patient demographic, risk factors and seasonal variation in onset of stroke.

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Section: Discussionsupporting

confidence: 90%

Patient Demographic, Risk Factors and Seasonal Variation in Onset of Stroke

M¹,

D²,

Sreenivas³

2016

jebmh

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“…Seasonal variation has been studied in many neurologic conditions with mixed and often conflicting results [9][10][11]. In addition, explanations for the seasonal variation are often lacking.…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation in hemorrhage and focal neurologic deficit due to intracerebral cavernous malformations

Flemming

Brown

Link

2015

Journal of Clinical Neuroscience

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“…The ten risk factors are associated with 90% of the risk of stroke are history of hypertension, current smoking, waist-to-hip ratio, diet risk score, regular physical activity, diabetes mellitus, alcohol intake, psychosocial stress and depression, cardiac causes and ratio of apolipoproteins B to A1 (1). Moreover, circadian variation has been also shown to have an important effect (2). Recently, more attention has been oriented toward the effect of weather conditions on stroke admissions (3-5).…”

mentioning

confidence: 99%

Relationship between weather conditions and admissions for ischemic stroke and subarachnoid hemorrhage

et al. 2017

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AimTo assess impacts of different weather conditions on hospitalizations of patients with ischemic strokes and subarachnoid hemorrhages (SAH) in South Florida.MethodsDiagnostic data of patients with spontaneous SAH and strokes were recorded between June 2010 and July 2013. Daily synchronous forecast charts were collected from the National Weather Service and the whole data were matched prospectively. The incidence rate ratio (IRR) was calculated.ResultsIncreased incidence rate of ischemic stroke was consistent with the daily lowest and highest air pressure (IRR 1.03, P = 0.128 and IRR 0.98, P = 0.380, respectively), highest air temperature (IRR 0.99, P = 0.375), and presence of hurricanes or storms (IRR 0.65, P = 0.054). Increased incidence of SAH cases was consistent with daily lowest and highest air pressure (IRR 0.87, P < 0.001 and IRR 1.08, P = 0.019, respectively) and highest air temperature (IRR 0.98, P < 0.001). Presence of hurricanes and/or tropical storms did not influence the frequency of SAH. We found no relationship between the presence of fronts and the admissions for ischemic stroke or SAH.ConclusionHigher number of ischemic stroke and SAH cases can be expected with the daily lowest and highest air pressure, highest air temperature. Presence of hurricanes or tropical storms increased the risk of ischemic stroke but not the SAH. These findings can help to develop preventive health plans for cerebrovascular diseases.

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Seasonal Differences and Circadian Variation in Stroke Occurrence and Stroke Subtypes

Cited by 47 publications

References 36 publications

Patient Demographic, Risk Factors and Seasonal Variation in Onset of Stroke

Patient Demographic, Risk Factors and Seasonal Variation in Onset of Stroke

Seasonal variation in hemorrhage and focal neurologic deficit due to intracerebral cavernous malformations

Relationship between weather conditions and admissions for ischemic stroke and subarachnoid hemorrhage

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