Readmissions and Mortality During the First Year After Stroke-Data From a Population-Based Incidence Study

Determination of spectroscopy marker of atherosclerotic carotid stenosis using FTIR-ATR combined with machine learning and chemometrics analyses

Atherosclerotic carotid stenosis (ACS) is a recognized risk factor for ischemic stroke. Currently, the gold diagnostic standard is Doppler ultrasound, the results of which do not provide certainty whether a given person should be qualified for surgery or not, because in some patients, carotid artery stenosis, for example at the level of 70 %, does not cause ischemic stroke in others yes. Therefore, there is a need for new methods that will clearly indicate the marker qualifying the patient for surgery. In this article we used Fourier Transform InfraRed Attenuated Total Reflectance (FTIR-ATR) spectra of serum collected from healthy and patients suffering from ACS, which had surgery were analyzed by machine learning and Principal Component Analysis (PCA) to determine chemical differences and spectroscopy marker of ACS. PCA demonstrate clearly differentiation between serum collected from healthy and non-healthy patients. Obtained results showed that in serum collected from ACS patients, higher absorbance of PO2- stretching symmetric, CH2 and CH3 symmetric and asymmetric and amide I vibrations were noticed than in control group. Moreover, lack of peak at 1106 cm-1 was observed in spectrum of serum from non-control group. As a result of spectral shifts analysis was found that the most important role in distinguishing between healthy and unhealthy patients is played by FTIR ranges caused by vibrations of PO2- phospholipids, amides III, II and CO lipid vibrations. Continuing, peaks at 1636 cm-1 and 2963 cm-1 were proposed as a potential spectroscopy markers of ACS. Finally, accuracy of obtained results higher than 90 % suggested, that FTIR-ATR can be used as an additional diagnostic tool in ACS qualifying for surgery.

Association between repeat imaging and readmission in patients with acute ischaemic stroke: a 16-year nationwide population-based study

OBJECTIVES

This study aims to evaluate such usage patterns and identify factors that may contribute to the need for repeat imaging in acute ischaemic stroke patients and determine the association between repeat imaging and readmission in Taiwan.

METHODS

We searched and analysed data from the Taiwan National Health Insurance Research Database for patients admitted for acute ischaemic stroke between 2002 and 2017. Cases where repeat brain imaging during the initial hospital admission occurred and where patients were readmitted within 30 days following discharge were documented.

RESULTS

Of a total of 195 016 patients with new onset ischaemic stroke, 51 798 (26.6%) underwent repeat imaging during their initial admission. Factors associated with repeat brain imaging included younger age, longer hospital stay, use of recombinant tissue plasminogen activator (rt-PA) therapy (odds ratio = 2.10 [95% CI, 1.98-2.22]), more recent year of diagnosis, higher National Institutes of Health Stroke Scale (NIHSS) score, and admission to a hospital offering a higher level of care. Repeat imaging was also associated with an increased risk of ischaemic stroke and all types of stroke readmission.

CONCLUSIONS

Repeat brain imaging of patients with stroke has increased in recent years, and it is associated with certain factors including age, length of stay, use of rt-PA, hospital level of care, and NIHSS score. It is also associated with increased readmission.

ADVANCES IN KNOWLEDGE

Knowledge of the associations of repeat imaging may help clinicians use repeat imaging more carefully and efficaciously.

Stroke rehabilitation pathways during the first year: A cost-effectiveness analysis from a cohort of 460 individuals

BACKGROUND

Stroke burden challenges global health, and social and economic policies. Although stroke recovery encompasses a wide range of care, including in-hospital, outpatient, and community-based rehabilitation, there are no published cost-effectiveness studies of integrated post-stroke pathways.

OBJECTIVE

To determine the most cost-effective rehabilitation pathway during the first 12 months after a first-ever stroke.

METHODS

A cohort of people in the acute phase of a first stroke was followed after hospital discharge; 51 % women, mean (SD) age 74.4 (12.9) years, mean National Institute of Health Stroke Scale score 11.7 (8.5) points, and mode modified Rankin Scale score 3 points. We developed a decision tree model of 9 sequences of rehabilitation care organised in 3 stages (3, 6 and 12 months) through a combination of public, semi-public and private entities, considering both the individual and healthcare service perspectives. Health outcomes were expressed as quality-adjusted life years (QALY) over a 1-year time horizon. Costs included healthcare, social care, and productivity losses. Sensitivity analyses were conducted on model input values.

RESULTS

From the individual perspective, pathway 3 (Short-term Inpatient Unit » Community Clinic) was the most cost-effective, followed by pathway 1 (Rehabilitation Centre » Community Clinic). From the healthcare service perspective, pathway 3 was the most cost-effective followed by pathway 7 (Outpatient Hospital » Private Clinic). All other pathways were considered strongly dominated and excluded from the analysis. The total 1-year mean cost ranged between €12104 and €23024 from the individual's perspective and between €10992 and €31319 from the healthcare service perspective.

CONCLUSION

Assuming a willingness-to-pay threshold of one times the national gross domestic product (€20633/QALY), pathway 3 (Short-term Inpatient Unit » Community Clinic) was the most cost-effective strategy from both the individual and healthcare service perspectives. Rehabilitation pathway data contribute to the development of a future integrated care system adapted to different stroke profiles.

Rapid systematic review of readmissions costs after stroke

BACKGROUND

Stroke readmissions are considered a marker of health quality and may pose a burden to healthcare systems. However, information on the costs of post-stroke readmissions has not been systematically reviewed.

OBJECTIVES

To systematically review information about the costs of hospital readmissions of patients whose primary diagnosis in the index admission was a stroke.

METHODS

A rapid systematic review was performed on studies reporting post-stroke readmission costs in EMBASE, MEDLINE, and Web of Science up to June 2021. Relevant data were extracted and presented by readmission and stroke type. The original study's currency values were converted to 2021 US dollars based on the purchasing power parity for gross domestic product. The reporting quality of each of the included studies was assessed using the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) checklist.

RESULTS

Forty-four studies were identified. Considerable variability in readmission costs was observed among countries, readmissions, stroke types, and durations of the follow-up period. The UK and the USA were the countries reporting the highest readmission costs. In the first year of follow-up, stroke readmission costs accounted for 2.1-23.4%, of direct costs and 3.3-21% of total costs. Among the included studies, only one identified predictors of readmission costs.

CONCLUSION

Our review showed great variability in readmission costs, mainly due to differences in study design, countries and health services, follow-up duration, and reported readmission data. The results of this study can be used to inform policymakers and healthcare providers about the burden of stroke readmissions. Future studies should not solely focus on improving data standardization but should also prioritize the identification of stroke readmission cost predictors.

Improving post-acute stroke follow-up care by adopting telecare consultations in a nurse-led clinic: Study protocol of a hybrid implementation-effectiveness trial

AIM

To evaluate the clinical effectiveness and implementation strategies of telecare consultations in post-stroke nurse-led clinics.

BACKGROUND

Telecare consultations could be an alternative to conventional in-person consultations and improve continuity of care for stroke survivors following their discharge from hospital. Previous studies utilizing telecare consultations only focused on testing their clinical effectiveness on stroke survivors; the appropriateness and feasibility of adopting this new delivery modality in a real-world setting were not examined.

DESIGN

A Type II hybrid effectiveness-implementation design will be adopted.

METHODS

Eligible stroke survivor participants will be randomly assigned to the intervention group (telecare consultation) or control group (usual in-person clinic consultation). Both groups will receive the same nursing intervention but delivered through different channels. The Reach, Effectiveness, Adoption, Implementation, Maintenance framework will be used to evaluate the clinical effectiveness and implementation outcomes. The primary outcome is the non-inferiority of the degree of disability between the two groups at 3 months into the intervention and at 3 months post-intervention. The paper complies with the SPIRIT guidelines for study protocols adapted for designing and reporting parallel group randomized trials.

CONCLUSION

The findings of this study will provide key insights into the processes for implementing and adopting telecare consultations into long-term services for post-stroke patients.

IMPACT

This study contributes to the translation of telecare consultations for stroke survivors into real-life settings. If effective, this program may provide guidance for expanding telecare consultations to other post-stroke nurse-led clinics or to patients with other chronic diseases.

TRIAL REGISTRATION

This study has been registered at clinicaltrials.gov (identifier: NCT05183672). Registered on 10 January 2022.

The crosstalk between Stroke and Cancer: Incidence of cancer after a first-ever cerebrovascular event in a population-based study

OBJECTIVES

To determine the cancer incidence after the first-ever cerebrovascular event (CVE) and compare it to the cancer incidence in the population from the same region.

METHODS

We evaluated 1069 patients with a first-ever CVE (Ischaemic or haemorrhagic stroke and Transient Ischaemic Attack) from a prospective population registry of stroke and transient focal neurological attacks, diagnosed between 2009 and 2011. We conducted a structured search to identify cancer-related variables and case-fatality for a period of 8 years following CVE. Cancer incidence in CVE patients was compared to the North Region Cancer Registry (RORENO).

RESULTS

We found that 90/1069 (8.4%) CVE patients developed cancer after a first-ever CVE. Overall cancer annual incidence rate was higher after a CVE (820/100,000, 95%CI: 619-1020) than in general population (513/100,000, 95%CI: 508-518). In the 45-54 age group cancer incidence post-CVE was 3.2-fold (RR, 95%CI: 1.6-6.4) higher compared to the general population, decreasing gradually in older age-groups. Median time between CVE and cancer was 3.2 years (IQR = 1.4-5.2). Lower respiratory tract and colorectal were the most frequent cancer types. In univariable models, male sex (sHR = 1.78, 95%CI: 1.17-2.72, p = 0.007), tobacco use (sHR = 2.04, 95%CI: 1.31-3.18, p = 0.002) and peripheral artery disease (sHR = 2.37, 95%CI: 1.10-5.13, p = 0.028) were associated to higher cancer risk after CVE. After adjustment, tobacco use (sHR = 1.84, 95%CI: 1.08-3.14, p = 0.026) remained associated to a higher risk of cancer.

CONCLUSIONS

At the population level, patients presenting a first-ever CVE have higher cancer incidence, that is particularly prominent in younger age-groups. Higher cancer incidence, delayed cancer diagnosis and increased mortality post-CVE warrants further research on long-term cancer surveillance in first-ever CVE survivors.

Clinical characteristic of a Haitian stroke cohort and a scoping review of the literature of stroke among the Haitian population

Background and Aim

There are significant disparities in stroke care and outcomes between low- and middle-income countries compared to high-income countries. Haiti, a lower-middle-income country, suffers from a lack of resources for acute stroke management. This study is the first to report the epidemiological profile of the Haitian population presenting with stroke symptoms at the largest academic hospital in the nation.

Methods

This is an observational study conducted over a period of 5 months from April 2021 to August 2021 in the Internal Medicine Department of the State University Hospital of Haiti. There were 51 included patients who were suspected to have had an acute stroke. A descriptive statistical analysis was conducted. A scoping review of the literature was also conducted.

Results

Over 50% of included patients were between 19 and 65 years old. The mean age at presentation was 61 years, and patients were predominantly female (64.7%). The prevalence of severe motor deficits was over 96%. The mean National Institutes of Health Stroke Scale was 12. Only 15.7% of patients (8/51) had a computed tomography (CT) scan during their hospitalization. The median time to CT scan was 84 h after symptom onset. About 80% of those with complications took more than 24 h to arrive at the hospital after the onset of symptoms. Eleven percent of patients had complications, and the mortality rate was 3.9%. There was a significant association between the Modified Rankin Scale and the occurrence of complications (p = 0.016). National Institutes of Health Stroke Scale (NIHSS) score had a significant association with the Glasgow score (F = 6.3; p < 0.001) where an inversely proportional correlation was observed between them (r = -0.7; p < 0.001) and a proportional correlation with the Rankin prediction score and the NIHSS (r = 0.3, p = 0.04). Little is known about the epidemiology of stroke patients in Haiti, and this limits the ability to develop targeted interventions to improve outcomes. In our scoping review, only three pertinent studies were identified over a 25-year period, this leads to a lack of data in regard to stroke care in Haiti mainly due to the absence of trained personnel.

Conclusion

In our cohort, stroke is mainly affecting female patients. The majority of stroke patients have moderate to severe motor deficits and took more than 24 h to arrive at the hospital. Urgent assistance is needed to strengthen personnel and infrastructure dedicated to stroke. Neurological assessment based on NIHSS and Rankin score should be systematic in stroke evaluation in Haiti.

Relevance for Patients

This study is relevant for patients because it emphasizes the challenges of stroke management in Haiti due to the non-availability of reference drugs, the time to arrive at the hospital to start treatment, as well as the means of diagnosis which are limited, like the CT scan. While stroke prevalence is on the rise in the country, it is the highest in the Caribbean and Latin America region.

Efficiency and effectiveness of intensive multidisciplinary follow-up of patients with stroke/TIA or myocardial infarction compared to usual monitoring: protocol of a pragmatic randomised clinical trial. DiVa (Dijon vascular) study

INTRODUCTION

The ongoing ageing population is associated with an increase in the number of patients suffering a stroke, transient ischaemic attack (TIA) or myocardial infarction (MI). In these patients, implementing secondary prevention is a critical challenge and new strategies need to be developed to close the gap between clinical practice and evidence-based recommendations. We describe the protocol of a randomised clinical trial that aims to evaluate the efficiency and effectiveness of an intensive multidisciplinary follow-up of patients compared with standard care.

METHODS AND ANALYSIS

The DiVa study is a randomised, prospective, controlled, multicentre trial including patients >18 years old with a first or recurrent stroke (ischaemic or haemorrhagic) or TIA, or a type I or II MI, managed in one of the participating hospitals of the study area, with a survival expectancy >12 months. Patients will be randomised with an allocation ratio of 1:1 in two parallel groups: one group assigned to a multidisciplinary, nurse-based and pharmacist-based 2-year follow-up in association with general practitioners, neurologists and cardiologists versus one group with usual follow-up. In each group for each disease (stroke/TIA or MI), 430 patients will be enrolled (total of 1720 patients) over 3 years. The primary outcome will be the incremental cost-utility ratio at 24 months between intensive and standard follow-up in a society perspective. Secondary outcomes will include the incremental cost-utility ratio at 6 and 12 months, the incremental cost-effectiveness ratio at 24 months, reduction at 6, 12 and 24 months of the rates of death, unscheduled rehospitalisation and iatrogenic complications, changes in quality of life, net budgetary impact at 5 years of the intensive follow-up on the national health insurance perspective and analysis of factors having positive or negative effects on the implementation of the project in the study area.

ETHICS AND DISSEMINATION

Ethical approval was obtained and all patients receive information about the study and give their consent to participate before randomisation. Results of the main trial and each of the secondary analyses will be submitted for publication in a peer-reviewed journal.

TRIAL REGISTRATION NUMBER

ClinicalTrials.gov Identifier: NCT04188457. Registered on 6 December 2019.

Factors associated with emergency readmissions after acute stroke: A retrospective audit of two hospitals

RATIONALE, AIMS AND OBJECTIVES

Emergency hospital readmissions within 30 days of discharge from hospital are considered a marker for the quality of hospital care, patient experience, the discharge process and integration with community services. This paper describes the frequency and variations in cause of emergency readmissions at 30 and 90 days following discharge after acute stroke from two stroke units.

METHODS

Retrospective data collection of Hospital Episodes Statistics (HES) and Sentinel Stroke National Audit Programme (SSNAP) of consecutive acute stroke hospital discharges over 24 months from 2017 to 2019 from two specialist stroke units in England. HES data were used to calculate the Charlson comorbidity index (CCI). Covariates were analysed for their association with readmission rate, including: age; gender; CCI; length of stay for first stroke admission; living alone; discharge to a care home; discharge receiving stroke specialist early supported discharge (ESD) rehabilitation and stroke severity as determined by National Institute for Health Stroke Scale on stroke admission.

RESULTS

From 2017 to 2019 there were 1999 live discharges with a primary diagnosis of stroke. Both hospitals had a trend of increasing readmission rates with increasing stroke severity and comorbidity. Longer length of stroke admission, especially for patients with increasing stroke severity, and patients receiving ESD rehabilitation after discharge reduced 90-day readmissions. This association was stronger at 90 days than at 30 days. Different readmission event rates were found at 30 and 90 days and when events were compared between the two hospitals.

CONCLUSION

Understanding differences in readmission event rates between hospitals at 30 and 90 days can support local planning of patient needs in the first weeks after stroke discharge and to investigate ways for hospital to reduce the impact of readmission. It is recommended that stroke services use both 30 and 90-day readmissions to inform service evaluation and improvement.

One-year recurrence of stroke and death in Lebanese survivors of first-ever stroke: Time-to-Event analysis

BACKGROUND

To date, despite the application of secondary prevention worldwide, first-ever stroke survivors remain at imminent risk of stroke recurrence and death in the short and long term. The present study aimed to assess the cumulative risk rates and identify baseline differences and stroke characteristics of Lebanese survivors.

METHODS

A prospective longitudinal study was conducted among survivors ≥18 years old who were followed-up for 15 months through a face-to-face interview. Kaplan-Meier method was used to calculate the cumulative rates of stroke mortality and recurrence. Cox-regression univariate and multivariable analyses were performed to identify the predictors of both outcomes.

RESULTS

Among 150 subjects (mean age 74 ± 12 years; 58.7% men vs. 44.3% women; 95.3% with ischemic stroke vs. 4.3% with intracerebral hemorrhage), high cumulative risk rates of stroke recurrence (25%) and death (21%) were highlighted, especially in the acute phase. Survival rates were lesser in patients with stroke recurrence compared to those without recurrence (Log rank test p < 0.001). Older age was the main predictor for both outcomes (p < 0.02). Large artery atherosclerosis was predominant in patients with stroke recurrence and death compared to small vessel occlusion (p < 0.02). Higher mental component summary scores of quality of life were inversely associated with stroke recurrence (p < 0.01). Lebanese survivors exhibited the highest percentages of depression and anxiety; elevated Hospital Anxiety and Depression Scale (HADS) scores were seen in those with stroke recurrence and those who died (≥80% with mean HADS scores ≥8). Lower Mini-Mental State Examination scores at the acute phase increased the risk of both outcomes by 10% (p < 0.03). Three out of 13 mortalities (23.1%) were presented with early epileptic seizures (p = 0.012). High educational level was the protective factor against stroke recurrence (p = 0.019). Administration of intravenous thrombolysis decreased the risk of both outcomes by 10% (p > 0.05).

CONCLUSION

Higher rates of stroke recurrence and death were observed in the first year following a stroke in Lebanon. Various factors were identified as significant determinants. Thus, health care providers and officials in Lebanon can use these findings to implement effective preventive strategies to best address the management of these factors to reduce the stroke burden and improve the short and long-term prognosis of stroke survivors.

Implementation of an Advanced Practice Registered Nurse-Led Clinic to Improve Follow-up Care for Post-Ischemic Stroke Patients

ABSTRACT

BACKGROUND: Ischemic stroke continues to be a leading cause of serious disability within the United States, affecting 795 000 people annually. Approximately 12% to 21% of post-ischemic stroke patients will be readmitted to the hospital within 30 days of discharge. Studies suggest that implementation of a follow-up appointment within 7 to 14 days of discharge improves 30-day readmission rates; however, implementation of these guidelines is uncommon, and follow-up visits within the recommended window are not often achieved. The purpose of this project was to evaluate the impact of an advanced practice registered nurse (APRN)-led stroke clinic on follow-up care for post-ischemic stroke patients. The aims were to improve time to follow-up visit and reduce 30-day unplanned readmissions. METHODS: A pre/post intervention design was used to evaluate the impact of a process to access the APRN-led stroke clinic. The intervention included a scheduling process redesign, and subsequent APRN and scheduler education. RESULTS: The time to clinic follow-up preintervention averaged 116.9 days, which significantly reduced to 33.6 days post intervention, P = .0001. Unplanned readmissions within 30 days declined from 11.5% to 9.9%; however, it was not statistically significant, P = .149. Age was not statistically different between preintervention and postintervention groups, P = .092, and other demographics were similar between the groups. CONCLUSION: An APRN-led clinic can improve follow-up care and may reduce unplanned 30-day readmissions for post-ischemic stroke patients. Further work is needed to determine the impact of alternative approaches such as telehealth.

Admission and Readmission/Death Patterns in Hospitalized and Non-hospitalized First-Ever-in-a-Lifetime Stroke Patients During the First Year: A Population-Based Incidence Study

Background: Hospitalization and readmission rates after a first-ever-in-a-lifetime stroke (FELS) are considered measures of quality of care and, importantly, may give valuable information to better allocate health-related resources. We aimed to investigate the hospitalization pattern and the unplanned readmissions or death of hospitalized (HospS) and non-hospitalized stroke (NHospS) patients 1 year after a FELS, based on a community register.

Methods: Data about hospitalization and unplanned readmissions and case fatality 1 year after a FELS were retrieved from the population-based register undertaken in Northern Portugal (ACIN2), comprising all FELS in 2009–2011. We used the Kaplan–Meier method to estimate 1-year readmission/death-free survival and Cox proportional hazard models to identify independent factors for readmission/death.

Results: Of the 720 FELS, 35.7% were not hospitalized. Unplanned readmission/death within 1 year occurred in 33.0 and 24.9% of HospS and NHospS patients, respectively. The leading causes of readmission were infections, recurrent stroke, and cardiovascular events. Stroke-related readmissions were observed in more than half of the patients in both groups. Male sex, age, pre- and post-stroke functional status, and diabetes were independent factors of readmission/death within 1 year.

Conclusion: About one-third of stroke patients were not hospitalized, and the readmission/death rate was higher in HospS patients. Still, that readmission/death rate difference was likely due to other factors than hospitalization itself. Our research provides novel information that may help implement targeted health-related policies to reduce the burden of stroke and its complications.

Enablers and barriers in hospital-to-home transitional care for stroke survivors and caregivers: A systematic review

AIMS AND OBJECTIVES

To synthesise qualitative research evidence on the experience of stroke survivors and informal caregivers in hospital-to-home transitional care.

BACKGROUND

Due to a shortened hospital stay, stroke survivors/caregivers must take over complex care on discharge from hospital to home. Gaps in the literature warrant a meta-synthesis of qualitative studies on perceived enablers and barriers during this crucial period.

DESIGN

A systematic review and meta-synthesis.

METHODS

A review was guided by Enhancing Transparency in Reporting the Synthesis of Qualitative Research (ENTREQ) checklist where six databases were searched from April to June 2020 including CINAHL Plus, MEDLINE, PsycINFO, Scopus, Web of Science and ProQuest and ProQuest Dissertations and Theses. There was no date limit to the search. Selected studies were critically appraised. A thematic synthesis approach was applied.

RESULTS

The synthesis of 29 studies identified three major findings. First, partnerships with stroke survivors/caregivers empower discharge preparation, foster competence to navigate health and social care systems and activate self-management capabilities. Second, gaps in discharge planning and the lack of timely postdischarge support contribute to unmet care needs for stroke survivors/caregivers and affect their ability to cope with poststroke changes. Third, stroke survivors/caregivers expect integrated transitional care that promotes shared decision-making and enables long-term self-management at home.

CONCLUSIONS

Hospital-to-home transition is a challenging period in the trajectory of poststroke rehabilitation and recovery. Further research is required to deepen understandings of all stakeholders' views and address unmet needs during transitional care.

RELEVANCE TO CLINICAL PRACTICE

Protocols and clinical guidelines relating to discharge planning and transitional care need to be reviewed to ensure partnership approach with survivors/caregivers in the design and delivery of individualised transitional care. Stroke nurses are in a unique position to lead timely support for survivors/caregivers and to bridge service gaps in hospital-to-home transitional care.

Risk factors among stroke subtypes and its impact on the clinical outcome of patients of Northern Portugal under previous aspirin therapy

BACKGROUND

In Western European countries, acute ischemic stroke (AIS) remains the third leading cause of death. Among the risk factors for cerebrovascular disease, some have more influence than others in certain stroke subtypes. The aim of this study was to evaluate the impact of risk factors among Stroke Subtypes on the clinical outcome of Portuguese patients under previous aspirin therapy.

MATERIALS AND METHODS

We studied a cohort of 371 patients diagnosed with AIS and a clinical follow-up protocol was set up.The patients were admitted in a Department of Internal Medicine of a major hospital. Standardized data assessment and stroke subtype classification (Oxfordshire Community Stroke Project) were used.

RESULTS

Arterial hypertension (80.4 %), overweight (72.6 %) and dyslipidemia (62.0 %) were the most prevalent risk factors with no statistical differences among the group's subtypes. Current smoking was more prevalent in POCI(62.9 %) with differences among subtypes (p = 0.002). Atrial fibrillation was more commonly reported in TACI (39.3 %) and less common in POCI (8.1 %) (p < 0.001).Comparing TACI vs Non TACI Stroke Subtypes demonstrated major differences in cumulative survival,among the cases with no previous aspirin treatment, after 3 years (51.9 % vs 88.8 %).The increased risk of mortality at 12 months is consistently observed for the presence of a previous atrial fibrillation (OR 3.01 95 %CI 1.69-5.39), TACI subtype (OR 10.4 95 %CI 4.83-22.6) and NIHSS over 10 (OR 9.33 95 % CI 4,49-19.4). When we analyze the impact of previous aspirin treatment in the risk for a new stroke event, it seems to have a protective effect in a time frame of 12 months, but this protection is lost extending at 24 months (p = 0.094 vs p = 0.005).

DISCUSSION

Our results indicate that smoking, atrial fibrillation and age have different relevance in their distribution among ischemic stroke subtypes at the time of diagnosis. Concerning the influence of the main stroke risk factors on the clinical outcome, our results present a strong influence of atrial fibrillation and of age. Severity of disease at diagnosis, represented by TACI subtype is clearly associated to decreased survival among patients with no record of previous aspirin therapy. Our results reinforce the relevance cohort studies of different populations, to achieve a more comprehensive knowledge of the impact of risk factors on stroke subtypes and on its clinical outcome.