Case-Fatality and Functional Outcome after Subarachnoid Hemorrhage (SAH) in INternational STRoke oUtComes sTudy (INSTRUCT).

BACKGROUND: There are few large population-based studies of outcomes after subarachnoid hemorrhage (SAH) than other stroke types. METHODS: We pooled data from 13 population-based stroke incidence studies (10 studies from the INternational STRroke oUtComes sTudy (INSTRUCT) and 3 new studies; N=657). Primary outcomes were case-fatality and functional outcome (modified Rankin scale score 3-5 [poor] vs. 0-2 [good]). Harmonized patient-level factors included age, sex, health behaviours (e.g. current smoking at baseline), comorbidities (e.g.history of hypertension), baseline stroke severity (e.g. NIHSS >7) and year of stroke. We estimated predictors of case-fatality and functional outcome using Poisson regression and generalized estimating equations using log-binomial models respectively at multiple timepoints. RESULTS: Case-fatality rate was 33% at 1 month, 43% at 1 year, and 47% at 5 years. Poor functional outcome was present in 27% of survivors at 1 month and 15% at 1 year. In multivariable analysis, predictors of death at 1-month were age (per decade increase MRR 1.14 [1.07-1.22]) and SAH severity (MRR 1.87 [1.50-2.33]); at 1 year were age (MRR 1.53 [1.34-1.56]), current smoking (MRR 1.82 [1.20-2.72]) and SAH severity (MRR 3.00 [2.06-4.33]) and; at 5 years were age (MRR 1.63 [1.45-1.84]), current smoking (MRR 2.29 [1.54-3.46]) and severity of SAH (MRR 2.10 [1.44-3.05]). Predictors of poor functional outcome at 1 month were age (per decade increase RR 1.32 [1.11-1.56]) and SAH severity (RR 1.85 [1.06-3.23]), and SAH severity (RR 7.09 [3.17-15.85]) at 1 year. CONCLUSION: Although age is a non-modifiable risk factor for poor outcomes after SAH, however, severity of SAH and smoking are potential targets to improve the outcomes.

Stroke prevalence in a medium-sized Swedish municipality.

OBJECTIVES: Many patients who have had stroke survive with functional disability for years. Stroke prevalence is a fundamental measure of the impact of stroke in society. Stroke prevalence has never been evaluated in Sweden. MATERIALS & METHODS: In this study, we use a registry-based method, using three overlapping Swedish registers, namely, the Swedish Stroke Register (Riksstroke), the National Patient Register, and a primary healthcare-based patient register. Data were gathered from these registers and cross-checked with the population register as per December 31st, 2019, with respect to stroke survivors (ICD-10 I60-I69) living in Kumla (population 21,738), a municipality well representative of Sweden. RESULTS: A total of 330 individuals with stroke were found, of which 42% were women. The mean age was 74.1 years in men and 75.1 years in women. 11.5% of the patients had more than one stroke. The mean duration since the first stroke was 8.3 years. The crude prevalence per 100,000 was 1754 in men, 1281 in women, and 1518 in both sexes. Adjusted to the European population, the ratio was 1570 per 100,000, and to the World population 936 per 100,000. CONCLUSIONS: In spite of a declining stroke incidence in Sweden, the stroke prevalence in Kumla, Sweden, is relatively high. Comparisons with other studies indicate that a decline in prevalence may have occurred since the early 2000s. Modern registers can support data collection, but the index stroke may have occurred almost forty years back in time.

Comorbidity in Stroke-Survivors: Prevalence and Associations with Functional Outcomes and Health.

OBJECTIVES: The purpose of this study was to evaluate the prevalence and impact of stroke-related comorbidity in a community-based sample of stroke survivors. We sought to find out which types of comorbidity that were most important with respect to the patients' functional outcomes and general health. MATERIALS AND METHODS: All stroke survivors (n = 330) living in a medium-sized Swedish municipality were included. Patient records were reviewed to determine the presence of comorbidities. A selection of patient reported outcomes were used to assess subjective symptoms, functional outcomes, and general health. Logistic regression models were used to investigate the association between comorbidities, residual symptoms, and subjective symptoms on the one hand, and functional outcomes and general health on the other hand. RESULTS: Hypertension (80%) was the most common cardiovascular risk factor. Ischemic heart disease was found in 18% and congestive heart failure in 10%. Of non-cardiovascular disorders, orthopaedic diseases were commonest (30%). Psychiatric disorders and cognitive impairment were present in 11% and 12% respectively. Hemiparesis is associated with both functional outcomes and general health. Additionally, orthopedic disorders, vertigo, cognitive impairment, nicotine use, chronic pulmonary disorders, and age, are associated with different functional outcomes. Psychiatric, orthopedic and neurological disorders are related to general health. The patient-reported outcome measure "feeling of tiredness" is important for many of the outcomes, while "feeling depressed" and "having pain" are associated with general health. CONCLUSIONS: Many medical conditions, several of which have received little attention so far, are associated with functional outcome and general health in stroke survivors. If the intention is to describe comorbidity relevant to function and general health in stroke patients, disorders that hitherto have received little attention, must be considered.

Secular Trends of Stroke Epidemiology in Örebro, Sweden, 2017 Compared to the Trends in 1999: A Population-Based Study.

BACKGROUND AND PURPOSE: A stroke incidence study in -Örebro, situated in Southern Sweden, that was carried out in 1999 showed high incidence rates. Since then, in many Western countries, declining incidence rates have been observed. The main purpose of this study is to examine whether there have been any changes in stroke incidence in the city of -Örebro between 1999 and 2017. Secondary purposes are to show trends in stroke severity, length of stay and case fatality (CF). METHODS: The criterion of an "ideal" stroke incidence study was used in both the 1999 and the present investigation. These criteria include uniform diagnostics, case ascertainment including strokes managed outside the hospital, and the use of several overlapping sources, prospective design, well-defined denominator, and a large population. RESULTS: The overall stroke incidence rate of first ever stroke (adjusted to the 2013 European population) dropped from 346/100,000 (95% CI 314-380) to 168/100,000 (95% CI 148-190). Stroke severity declined from a median of 6 to 4 points on the National Institute of Health Stroke scale. CF within 28 days also declined from 19 to 16% (n.s.). Median length-of-stay in hospital was 16 days in 1999, and 10 days in 2017. Twenty-one per cent of all kinds of stroke were recurrent (not included in the above results). CONCLUSIONS: During the years between 1999 and 2017, there have been reductions in stroke incidence, severity and mortality. The explanation is most likely to be found in the prevalence of risk factors and how they are treated. The use of antihypertensives and statins has increased, corresponding to lower levels of blood pressure and cholesterol in the population. The use of anticoagulants in patients with atrial fibrillation has increased. Cigarette smoking has decreased. These are encouraging results that show that preventive medication and public health measures work in practice.

To Treat or Not to Treat: Anticoagulants as Secondary Preventives to the Oldest Old With Atrial Fibrillation.

BACKGROUND AND PURPOSE: Anticoagulant treatment is effective for preventing recurrent ischemic strokes in patients who have atrial fibrillation. This benefit is paid by a small increase of hemorrhages. Anticoagulant-related hemorrhages seem to increase with age, but there are few studies showing whether the benefits of treatment persist in old age. METHODS: For this observational study, 4 different registers were used, among them Riksstroke, the Swedish Stroke Register. Patients who have had a recent ischemic stroke, were 80 to 100 years of age, and had atrial fibrillation, were included from 2006 through 2013. The patients were stratified into 3 age groups: 80 to 84, 85 to 89, and ≥90 years of age. Information on stroke severity, risk factors, drugs, and comorbidities was gathered from the registers. The patients were followed with respect to ischemic or hemorrhagic stroke, other hemorrhages, or death. RESULTS: Of all 23 356 patients with atrial fibrillation, 6361 (27%) used anticoagulants after an ischemic stroke. Anticoagulant treatment was associated with less recurrent ischemic stroke in all age groups. Hemorrhages increased most in the ≥90-year age group, but this did not offset the overall beneficial effect of the anticoagulant. Apart from age, no other cardiovascular risk factor or comorbidity was identified that influenced the risk of anticoagulant-associated hemorrhage. Drugs other than anticoagulants did not influence the incidence of major hemorrhage. CONCLUSIONS: Given the patient characteristics in this study, there is room for more patients to be treated with anticoagulants, without hemorrhages to prevail. In nonagenarians, hemorrhages increased somewhat more, but this did not affect the overall outcome in this age stratum.

Long-Term Risk of Stroke after Transient Ischemic Attack.

BACKGROUND: In the absence of active management, the stroke risk after a transient ischemic attack (TIA) may be high. Almost 10 years ago, the results of the EXPRESS and SOS-TIA studies called for a more rapid management of TIA patients. The purpose of this study was to investigate the other stroke risks in the longer term, after the implementation of a more active approach to TIA. We also wanted to assess the predictive value of the ABCD2 score in this context. METHODS: Riksstroke is the national stroke registry in Sweden. Data from Riksstroke's TIA module, and the national cause-of-death register, for the years 2011 and 2012 were used in this study. Stroke occurrence was monitored via Riksstroke. Cox's regression was used for risk evaluation. The predictive value of the ABCD2 score was assessed by calculating the area under the receiver operating characteristics curve. RESULTS: A total of 15,068 TIA episodes occurred in 14,102 patients. The follow-up time varied between 0 and 819 days, with an average of 417 days. The mortality for all TIA patients during the follow-up time was 7.1%. Of the unique patients, 545 had one or more strokes (3.9%), corresponding to 34 events per 1,000 person years. Significant risk factors for stroke were: age, previous TIA, atrial fibrillation (AF), oral anticoagulant (OAC) treatment, hypertension treatment, and the ABCD2 items speech impairment, unilateral weakness, and diabetes mellitus. The ABCD2 score correlated with a subsequent stroke, but its predictive value was low. CONCLUSION: The risk of stroke is low after the acute phase of a TIA, probably lower than in previous studies. This may be due to better secondary prevention in recent years. Several risk factors predict stroke, notably hypertensive treatment, which may be inadequate; and AF, where OACs may be under-used. It is difficult to identify the role of the ABCD2 score in clinical practice.

Determinants in Adolescence of Stroke-Related Hospital Stay Duration in Men: A National Cohort Study.

BACKGROUND AND PURPOSE: Physical and psychological characteristics in adolescence are associated with subsequent stroke risk. Our aim is to investigate their relevance to length of hospital stay and risk of second stroke. METHODS: Swedish men born between 1952 and 1956 (n=237 879) were followed from 1987 to 2010 using information from population-based national registers. Stress resilience, body mass index, cognitive function, physical fitness, and blood pressure were measured at compulsory military conscription examinations in late adolescence. Joint Cox proportional hazards models estimated the associations of these characteristics with long compared with short duration of stroke-related hospital stay and with second stroke compared with first. RESULTS: Some 3000 men were diagnosed with nonfatal stroke between ages 31 and 58 years. Low stress resilience, underweight, and higher systolic blood pressure (per 1-mm Hg increase) during adolescence were associated with longer hospital stay (compared with shorter) in ischemic stroke, with adjusted relative hazard ratios (and 95% confidence intervals) of 1.46 (1.08-1.89), 1.41 (1.04-1.91), and 1.01 (1.00-1.02), respectively. Elevated systolic and diastolic blood pressures during adolescence were associated with longer hospital stay in men with intracerebral hemorrhage: 1.01 (1.00-1.03) and 1.02 (1.00-1.04), respectively. Among both stroke types, obesity in adolescence conferred an increased risk of second stroke: 2.06 (1.21-3.45). CONCLUSIONS: Some characteristics relevant to length of stroke-related hospital stay and risk of second stroke are already present in adolescence. Early lifestyle influences are of importance not only to stroke risk by middle age but also to recurrence and use of healthcare resources among stroke survivors.

Incidence of Transient Ischemic Attacks in Sweden.

BACKGROUND AND PURPOSE: Stroke incidence may be on the decline in high-income countries. There may have been a shift from severe forms of cerebrovascular disease to less severe forms. No study regarding transient ischemic attack (TIA) incidence has been performed in Sweden since the 1980s. METHODS: We used 2011 and 2012 data from the Swedish stroke register. A large proportion of Sweden's 72 hospitals took part in the TIA register, meaning that 63 (2011) and 66 (2012) percent of the entire population were studied. RESULTS: The number of TIA-cases was 13,880. The number of first ever TIA cases was 9098, 4,675 in men, and 4,423 in women, comprising 66% of all TIAs. The crude overall IR for first ever TIA was 74 per 100,000. The age- and sex-standardized IRs were 73 per 100,000 when standardized to the European population of 2013, and 47 per 100,000 when standardized to the European population 1976. CONCLUSIONS: The TIA incidence in Sweden is high, and no decline is seen when compared with previous studies. Better prevention may have caused a shift from severe forms of cerebrovascular disease to less severe forms. For demographic reasons, the health services will most likely face an increasing number of TIA patients in the coming years.

Stress resilience in male adolescents and subsequent stroke risk: cohort study.

OBJECTIVE: Exposure to psychosocial stress has been identified as a possible stroke risk, but the role of stress resilience which may be relevant to chronic exposure is uncertain. We investigated the association of stress resilience in adolescence with subsequent stroke risk. METHODS: Register-based cohort study. Some 237 879 males born between 1952 and 1956 were followed from 1987 to 2010 using information from Swedish registers. Cox regression estimated the association of stress resilience with stroke, after adjustment for established stroke risk factors. RESULTS: Some 3411 diagnoses of first stroke were identified. Lowest stress resilience (21.8%) compared with the highest (23.7%) was associated with increased stroke risk, producing unadjusted HR (with 95% CIs) of 1.54 (1.40 to 1.70). The association attenuated slightly to 1.48 (1.34 to 1.63) after adjustment for markers of socioeconomic circumstances in childhood; and after further adjustment for markers of development and disease in adolescence (blood pressure, cognitive function and pre-existing cardiovascular disease) to 1.30 (1.18 to 1.45). The greatest reduction followed further adjustment for markers of physical fitness (BMI and physical working capacity) in adolescence to 1.16 (1.04 to 1.29). The results were consistent when stroke was subdivided into fatal, ischaemic and haemorrhagic, with higher magnitude associations for fatal rather than non-fatal, and for haemorrhagic rather than ischaemic stroke. CONCLUSIONS: Stress susceptibility and, therefore, psychosocial stress may be implicated in the aetiology of stroke. This association may be explained, in part, by poorer physical fitness. Effective prevention might focus on behaviour/lifestyle and psychosocial stress.

Trends in stroke treatment and outcome between 1995 and 2010: observations from Riks-Stroke, the Swedish stroke register.

BACKGROUND: Continuous changes in stroke treatment and care, as well as changes in stroke characteristics, may alter stroke outcome over time. The aim of this paper is to describe time trends for treatment and outcome data, and to discuss if any such changes could be attributed to quality changes in stroke care. METHODS: Data from Riks-Stroke, the Swedish stroke register, were analyzed for the time period of 1995 through 2010. The total number of patients included was 320,181. The following parameters were included: use of computed tomography (CT), stroke unit care, thrombolysis, medication before and after the stroke, length of stay in hospital, and discharge destination. Three months after stroke, data regarding walking, toileting and dressing ability, as well social situation, were gathered. Survival status after 7, 27 and 90 days was registered. RESULTS: In 1995, 53.9% of stroke patients were treated in stroke units. In 2010 this proportion had increased to 87.5%. Fewer patients were discharged to geriatric or rehabilitation departments in later years (23.6% in 2001 compared with 13.4% in 2010), but more were discharged directly home (44.2 vs. 52.4%) or home with home rehabilitation (0 vs. 10.7%). The need for home help service increased from 18.2% in 1995 to 22.1% in 2010. Regarding prevention, more patients were on warfarin, antihypertensives and statins both before and after the stroke. The functional outcome measures after 3 months did improve from 2001 to 2010. In 2001, 83.8% of patients were walking independently, while 85.6% were independent in 2010. For toileting, independence increased from 81.2 to 84.1%, and for dressing from 78.0 to 80.4%. Case fatality (CF) rates after 3 months increased from 18.7% (2001) to 20.0% (2010). This trend is driven by patients with severe strokes. CONCLUSIONS: Stroke outcomes may change over a relatively short time period. In some ways, the quality of care has improved. More stroke patients have CT, more patients are treated in stroke units and more have secondary prevention. Patients with milder strokes may have benefited more from these measures than patients with severe strokes. Increased CF rates for patients with severe stroke may be caused by shorter hospital stays, shorter in-hospital rehabilitation periods and lack of suitable care after discharge from hospital.

Long-term Risk of Stroke in Patients With Inflammatory Bowel Disease: A Population-Based, Sibling-Controlled Cohort Study, 1969-2019.

BACKGROUND AND OBJECTIVES: Patients with inflammatory bowel disease (IBD) are at an increased risk of thromboembolic events, but evidence on the long-term risk of stroke remains scarce. We aimed to explore whether patients with a biopsy-confirmed IBD had an increased long-term risk of stroke. METHODS: This cohort included all patients with biopsy-confirmed IBD in Sweden between 1969 and 2019 and up to 5 matched reference individuals per patient who were randomly selected from the general population and IBD-free full siblings. The primary outcome was incident overall stroke; secondary outcomes were ischemic and hemorrhagic strokes. Stroke was identified from the Swedish National Patient Register by using both primary and secondary diagnoses. Adjusted hazard ratios (aHRs) for stroke were estimated by flexible parametric survival models. RESULTS: A total of 85,006 patients with IBD (including Crohn disease [CD, n = 25,257], ulcerative colitis [UC, n = 47,354], and IBD-unclassified [IBD-U, n = 12,395]), 406,987 matched reference individuals, and 101,082 IBD-free full siblings were included in the analysis. We observed 3,720 incident strokes in patients with IBD (incidence rate [IR] 32.6 per 10,000 person-years) and 15,599 in reference individuals (IR 27.7; aHR 1.13, 95% CI 1.08-1.17). The elevated aHR remained increased even 25 years after diagnosis, corresponding to 1 additional stroke case per 93 patients with IBD until then. The excess aHR was mainly driven by ischemic stroke (aHR 1.14; 1.09-1.18) rather than hemorrhagic stroke (aHR 1.06; 0.97-1.15). The risk of ischemic stroke was significantly increased across IBD subtypes (CD [IR 23.3 vs 19.2; aHR 1.19; 1.10-1.29], UC [IR 25.7 vs 22.6; aHR 1.09; 1.04-1.16], and IBD-U [IR 30.5 vs 22.8; aHR 1.22; 1.08-1.37]). Similar results were found when patients with IBD were compared with their siblings. DISCUSSION: Patients with IBD were at an increased risk of stroke, especially of ischemic events, irrespective of the IBD subtype. The excess risk persisted even 25 years after diagnosis. These findings highlight the need for clinical vigilance about the long-term excess risk of cerebrovascular events in patients with IBD.

Thrombolytic therapy rates and stroke severity: an analysis of data from the Swedish stroke register (Riks-Stroke) 2007-2010.

BACKGROUND AND PURPOSE: We tested the hypothesis that higher proportions of patients with minor stroke being treated with thrombolysis contribute to increasing overall rates of thrombolysis. METHODS: We included 1743 ischemic stroke patients (age 18-80 years) treated with thrombolysis, recorded in the Swedish stroke register Riks-Stroke between 2007 and 2010. Minor stroke was defined as National Institutes of Health Stroke Scale score ≤ 5. RESULTS: The proportion with minor stroke among patients treated with thrombolysis increased from 22.1% in 2007 to 28.7% in 2010 (P=0.021). The rate of increase did not differ significantly between men and women, age groups, or hospital types (university hospitals, other large hospitals, or community hospitals). Hospitals with high proportions of thrombolysis patients with minor stroke were more likely to have high thrombolysis frequencies (R=0.55; P<0.001). CONCLUSIONS: In recent years, an increase in the proportion of patients with minor stroke treated with thrombolysis has contributed to rising overall thrombolysis rates in Sweden. At the hospital level, high rates of thrombolysis are associated with a high proportion of minor stroke being treated.

Risk of stroke in 28,000 patients with celiac disease: a nationwide cohort study in Sweden.

BACKGROUND: Earlier studies on stroke in celiac disease (CD) have been underpowered, but a recent study suggested that childhood CD is associated with a 10-fold increased risk of death from stroke, although it was based on small numbers. We examined the risk of stroke in patients with biopsy-verified CD. METHODS: We collected biopsy data from all 28 pathology departments in Sweden and identified 28,676 individuals with CD diagnosed between 1969 and 2007 (Marsh 3: villous atrophy). In the main analyses, we used Cox regression to estimate hazard ratios (HRs) for stroke in patients with CD compared with HRs for stroke in 141,806 sex- and age-matched controls. RESULTS: During follow-up, there were 785 first-stroke diagnoses in patients with CD and 2937 in reference individuals. Patients with CD were at increased risk of stroke (HR 1.10; 95% confidence interval [CI] 1.01-1.19). HRs were similar for ischemic stroke and brain hemorrhage and were not affected by adjustment for type 1 diabetes, rheumatoid arthritis, use of medication against hypertension, or dyslipidemia. The absolute risk of stroke in patients with CD was 267 per 100,000 person-years (excess risk 24/100,000). The highest risk estimates occurred in the first year, with virtually no increased risk after more than 5 years of follow-up after CD diagnosis. The HR for stroke in childhood CD was 1.10 (95% CI 0.37-3.22). CONCLUSIONS: Patients with CD are at only a small increased risk of stroke, which persists only for a brief period after diagnosis. CD does not seem to be a major risk factor for stroke.

Contribution of participation and resilience to quality of life among persons living with stroke in Sweden: a qualitative study.

PURPOSE: Resilience contributes to positive adaptation after many health conditions, but little is known about its contribution to long-term recovery after stroke. This study investigated the lived experience of resilience and participation and their relationship to quality of life after stroke in Sweden. MATERIAL AND METHOD: Semi-structured telephone interviews were conducted with 19 informants (10 male, 9 female), aged from 44-89 years and between 1 and 19 years post-stroke. Stroke severity ranged from mild (n = 8), moderate (n = 9) to severe (n = 2). Interviews were analysed using content analysis. RESULTS: The analysis resulted in an overarching theme; Life with stroke has been adapted to but not accepted, built on five subthemes: 1) Adapting and adjusting life, 2) Meaningful values in life, 3) Inner resources, 4) Support and treatment from social relations, and 5) Support and treatment from external resources. CONCLUSION: Participants described a tension between adapting and accepting life after stroke. Resilience was a useful framework, highlighting the contribution of inner, social and societal resources to recovery and quality of life, both directly and as enhanced through increased participation. Important factors for adaptation are meaningful values in life, individual strategies for adaptation and support from both social relationship and the society.

Neurological Complications After Electrochemotherapy Treatment in the Head and Neck Area.

BACKGROUND/AIM: Electrochemotherapy (ECT) is a predominately palliative treatment for cutaneous metastases where an electric field is used to increase the intracellular accumulation of a chemotherapeutic drug (bleomycin or cisplatin). ECT induces a strong anti-vascular effect and endothelial cells seem especially vulnerable. To date, almost no neurological and/or cerebrovascular complications after ECT treatment have been published. In this paper two such cases are reported. CASE REPORT: A seizure in a man treated with ECT for a basal cell carcinoma in the temporal region and a fatal ischemic stroke in a woman treated for cutaneous metastases in the neck are reported. In both cases a causal relationship to ECT treatment was strongly suspected. CONCLUSION: ECT in the head and neck can potentially cause severe neurological complications. Ultrasound is recommended for ECT treatment in the neck.

"I can manage the challenge" - a qualitative study describing experiences of living with balance limitations after first-ever stroke.

Purpose: To describe experiences of living with balance limitations after first-ever stroke. Materials and methods: This study has a qualitative design, comprising interviews with 19 persons with first-ever stroke, ten women and nine men. Their mean age was 77 years and the mean time since stroke was 15 months. Stroke survivors who were able to walk outdoors with or without a walking aid and who were independent in toileting and dressing were invited to participate. Semi-structured individual interviews were performed. An inductive qualitative content analysis of the manifest and latent content was conducted. Results: The results are presented in two themes illustrating the latent content of the data, "Feeling dizzy and unstable is a continuous challenge" and "Feeling confidence despite dizziness and unsteadiness", and seven categories illustrating the manifest content: Limitations in daily life; Being emotionally affected; The need for physical support; Everything takes time; I can still manage; Feelings of acceptance; and Finding individual solutions. Conclusions: All participants experienced the balance limitations as a continuous challenge in their everyday life, yet they also felt confidence. They had to some degree adapted their activities and were able to manage their daily life.