Hospital readmission within 10 years post stroke: frequency, type and timing.

BACKGROUND: The aim of this study was to examine the hospital readmissions in a 10 year follow-up of a stroke cohort previously studied for acute and subacute complications and to focus on their frequency, their causes and their timing. METHODS: The hospital records of 243 patients, 50% of a cohort of 489 patients acutely and consecutively admitted to our stroke unit in 2002/3, were subjected to review 10 years after the incidental stroke and all acute admissions were examined. The main admitting diagnoses were attributed to one of 18 predefined categories of illness. Additionally, the occurrence of death was registered. RESULTS: After 10 years 68.9% of patients had died and 72.4% had been readmitted to the hospital with a mean number of readmissions of 3.4 (+15.1 SD). 20% of the readmissions were due to a vascular cause, 17.3% were caused by infection, 9.3% by falls with (6.1%) and without fracture, 5.7% by a hemorrhagic event. The readmission rate was highest in the first 6 months post stroke with a rate of 116.2 admissions/100 live patient-years. Falls with fractures occurred maximally 3-5 years post stroke. CONCLUSIONS: Hospital readmissions over the 10 years following stroke are caused by vascular events, infections, falls and hemorrhagic events, where the first 6 months are a period of particular vulnerability. The magnitude and the spectrum of these long-term complications suggest the need for a more comprehensive approach to post stroke prophylaxis.

Comparison of the validity of stroke diagnoses in a medical quality register and an administrative health register.

AIMS: Health registers are essential sources of data used in a wide range of stroke research, including epidemiological, clinical and healthcare studies. Regardless of the type of register, the data must be of high quality to be useful. In this study, we investigated and compared the correctness and completeness of the Norwegian Patient Register (an administrative health register) and the Norwegian Stroke Register (a medical quality register for acute stroke). METHODS: We reviewed the medical records for 5192 admissions to hospital in 2012 and defined cases of stroke in the two registers as true positive, false positive, true negative or false negative. We calculated the sensitivity, specificity, positive predictive value (PPV) and negative predictive value with 95% confidence intervals assuming a normal approximation of the binomial distribution. RESULTS: The Norwegian Stroke Register was highly correct and relatively complete (sensitivity 88.1%, specificity 100% and PPV 98.6%). The Norwegian Patient Register was more complete, but less correct, when we included both the main and secondary diagnoses of stroke (sensitivity 96.8%, specificity 99.6% and PPV 79.7%); restricting the analyses to the main diagnoses of stroke resulted in less complete and more correct registrations (sensitivity 86.1%, specificity 99.9% and PPV 93.5%). CONCLUSIONS: The Norwegian Stroke Register and the Norwegian Patient Register are adequately complete and correct to serve as valuable sources of data for epidemiological, clinical and healthcare studies, as well as for administrative purposes.

Functional outcome after common poststroke complications occurring in the first 90 days.

BACKGROUND AND PURPOSE: The aim of this study was to explore the associations of common medical complications with functional outcome at 90 days post stroke. METHODS: Patients with unselected acute stroke were included and observed for 16 predefined complications during the first week. Fifty percent (244 patients) were allocated to follow-up of 13 complications until 90 days and then assessed with the modified Rankin Scale 90. Common complications were defined as complications with frequencies of ≥5%. Ordinal logistic regression (worsened outcome), as well as binary logistic regression for severe dependency and death (modified Rankin Scale score>3) was performed. RESULTS: Seven of the 13 complications occurred at a frequency ≥5%. Recurrent stroke and chest infection were found to have an odds ratio for worsened outcome of 7.45 (95% confidence interval, 2.83-20.96; P<0.0001) and 3.28 (95% confidence interval, 1.16-9.29; P=0.025), respectively. Infections other than chest infections and urinary tract infections had an odds ratio for worsened outcome of 1.59 (95% confidence interval, 1.12-2.24; P=0.009) and falls an odds ratio of 1.43 (95% confidence interval, 1.06 to 1.93; P=0.021). Myocardial infarction, urinary tract infections, and pain were not associated with a worsened outcome in terms of modified Rankin Scale 90. CONCLUSIONS: Recurrent stroke and chest infections were strongly associated with a worsened outcome. Other infections and falls were associated with less worsening. For myocardial infarction, urinary tract infections, and pain no association with functional outcome was found. Active strategies for prevention and early treatment of the first 2 complications seem advisable; patient monitoring as part of comprehensive stroke unit care should ensure timely identification and treatment of all complications.

Mechanisms, predictors and clinical impact of early neurological deterioration: the protocol of the Trondheim early neurological deterioration study.

BACKGROUND: 10-40% of patients with acute ischemic stroke (AIS) suffer an early neurological deterioration (END), which may influence their long term prognosis. Multiple definitions of END exist, even in recently published papers. In the search for causes, various biochemical, clinical, and imaging markers have been found to be associated to END after AIS in some but not in other studies. The primary aim of this study is to assess the contribution of END to functional level at 3 months post stroke measured by modified Rankin Scale (mRS). Secondary aims are to identify factors and mechanisms associated with END and to define the prevalence, degree and timing of END in relation to stroke onset, and to compare Scandinavian Stroke Scale (SSS) and National Institute of Health Stroke Scale (NIHSS) based END-definitions. We hypothesized that END detected by changes in NIHSS and SSS (according to previously published criteria) at a threshold of 2 points indicate worsened prognosis, and that SSS is not inferior to NIHSS in predicting such a change. We further hypothesized that clinical deterioration has several causes, including impaired physiological homeostasis, vascular pathology, local effects and reactions secondary to the ischemic lesion, along with biochemical disturbances. METHODS: Single-centre prospective observational study. PARTICIPANTS: Previously at home-dwelling patients admitted to our stroke unit within 24 hours after ictus of AIS are included into the study, and followed for 3 months. They are managed according to current procedures and national guidelines. A total of 368 patients are included by the end of the enrolment period (December 31(st) 2013), and the material will be opened for analysis by June 30(th) 2014. Frequent neurological assessments, continuous monitoring, and repeated imaging and blood samples are performed in all patients in order to test the hypotheses. DISCUSSION: Strengths and weaknesses of our approach, along with reasons for the methods chosen in this study are discussed.

Characterizing upper extremity fine motor function in the presence of white matter hyperintensities: A 7 T MRI cross-sectional study in older adults.

BACKGROUND: White matter hyperintensities (WMH) are a prevalent radiographic finding in the aging brain studies. Research on WMH association with motor impairment is mostly focused on the lower-extremity function and further investigation on the upper-extremity is needed. How different degrees of WMH burden impact the network of activation recruited during upper limb motor performance could provide further insight on the complex mechanisms of WMH pathophysiology and its interaction with aging and neurological disease processes. METHODS: 40 healthy elderly subjects without a neurological/psychiatric diagnosis were included in the study (16F, mean age 69.3 years). All subjects underwent ultra-high field 7 T MRI including structural and finger tapping task-fMRI. First, we quantified the WMH lesion load and its spatial distribution. Secondly, we performed a data-driven stratification of the subjects according to their periventricular and deep WMH burdens. Thirdly, we investigated the distribution of neural recruitment and the corresponding activity assessed through BOLD signal changes among different brain regions for groups of subjects. We clustered the degree of WMH based on location, numbers, and volume into three categories; ranging from mild, moderate, and severe. Finally, we explored how the spatial distribution of WMH, and activity elicited during task-fMRI relate to motor function, measured with the 9-Hole Peg Test. RESULTS: Within our population, we found three subgroups of subjects, partitioned according to their periventricular and deep WMH lesion load. We found decreased activity in several frontal and cingulate cortex areas in subjects with a severe WMH burden. No statistically significant associations were found when performing the brain-behavior statistical analysis for structural or functional data. CONCLUSION: WMH burden has an effect on brain activity during fine motor control and the activity changes are associated with varying degrees of the total burden and distributions of WMH lesions. Collectively, our results shed new light on the potential impact of WMH on motor function in the context of aging and neurodegeneration.

Stroke unit care combined with early supported discharge improves 5-year outcome: a randomized controlled trial.

BACKGROUND AND PURPOSE: Early supported discharge (ESD) seems to be a promising alternative to conventional follow-up care after acute stroke. We have previously shown that stroke unit care combined with ESD has beneficial effects on functional outcome and the use of resources for up to 1 year. The aim of this trial was to evaluate outcome after 5 years. METHODS: We performed a randomized controlled trial with 320 acute stroke patients allocated to ordinary stroke unit care (160 patients) or stroke unit care with ESD (160 patients). The ESD service consisted of a mobile team that co-coordinated hospital discharge and further rehabilitation during 1 month of follow-up in cooperation with the primary health care. Mortality, residence, and functional outcome including modified Rankin scale were registered after 5 years. All assessments were blinded. RESULTS: There was no difference between the groups with modified Rankin scale score ≤2 (P=0.213), but there was a trend toward greater improvement in modified Rankin scale score in the ESD group from onset of stroke (38% versus 30%; P=0.106). More patients were dead or institutionalized in the ordinary stroke unit care group (P=0.032); 158 patients were alive, 84 were in ESD, and 74 were in ordinary stroke unit care. Of the 158 patients alive, a greater proportion were living at home in ESD (86%/70%; P=0.019). CONCLUSIONS: Stroke unit care combined with ESD seems to reduce death and institutional care and to improve patients' chances of living at home 5 years after stroke compared to traditional stroke care. There is a trend toward improved functional outcome in the ESD group.

Medical complications in a comprehensive stroke unit and an early supported discharge service.

BACKGROUND AND PURPOSE: The aims of the study were to examine the frequency and timing of predefined medical complications in unselected acute stroke patients treated in an acute comprehensive stroke unit and an early supported discharge service. METHODS: Four hundred eighty-nine acute stroke patients were included and followed up with assessments of 16 prespecified complications during the first week. Two hundred forty-four of the patients were randomly allocated to a 3-month follow-up. RESULTS: During the first week, 312 of 489 patients (63.8%) experienced 1 or more complications. The most common complications were pain in 117 patients (23.9%), temperature >or=38 degrees C in 116 (23.7%), progressing stroke in 90 (18.4%), urinary tract infection in 78 (16.0%), troponin T elevation without criteria of myocardial infarction in 57 (11.7%), chest infections in 55 (11.2%), nonserious falls in 36 (7.4%), and myocardial infarction in 22 (4.5%), whereas stroke recurrence, seizure, deep venous thrombosis, pulmonary embolism, shoulder pain, serious falls, other infections, and pressure sores were each present in