The Positive Predictive Value of Pediatric Stroke Diagnoses in Administrative Data: A Retrospective Validation Study.

Background: This retrospective cohort study aimed to examine the positive predictive value (PPV) of pediatric stroke diagnoses in the Danish National Registry of Patients (DNRP) and the impact of different stroke definitions on the PPV. Methods: We included children registered with a stroke or stroke-related diagnosis in the DNRP between January 2017 through December 2020. Two assessors reviewed medical records and validated cases according to the American Heart and American Stroke Association (AHA/ASA) stroke definition. The level of interrater agreement was examined using kappa statistics. Validation by the AHA/ASA definition was compared with validation according to the definition in the International Classification of Disease 11th version (ICD-11) and the World Health Organization's definition. Results: Stroke was confirmed in 120 of 309 included children, yielding an overall PPV of 0.39 (95% CI: 0.33-0.45). PPV varied across stroke subtypes from 0.83 (95% CI: 0.71-0.92) for ischemic stroke (AIS), 0.57 (95% CI: 0.37-0.76) for unspecified stroke, 0.42 (95% CI: 0.33-0.52) for intracerebral hemorrhage (ICH) to 0.31 (95% CI: 0.55-0.98) and 0.07 (95% CI: 0.01-0.22) for cerebral venous thrombosis and subarachnoid hemorrhage (SAH), respectively. Most non-confirmed ICH and SAH diagnoses were in children with traumatic intracranial hemorrhages (36 and 66% respectively). Among 70 confirmed AIS cases, 25 (36%) were identified in non-AIS code groups. PPV varied significantly across stroke definitions with the highest for the AHA/ASA definition (PPV = 0.39, 95% CI: 0.34-0.45) and the lowest for the WHO definition (PPV = 0.29, 95% CI: 0.24-0.34). Correspondingly, the incidence of pediatric AIS per 100.000 person-years changed from 1.5 for the AHA/ASA definition to 1.2 for ICD-11 and 1.0 for the WHO-definition. The overall interrater agreement was considered excellent (κ=0.85). Conclusion: After validation, stroke was confirmed in only half of the children registered in the DNRP with a stroke-specific diagnosis. Non-validated administrative data should be used with caution in pediatric stroke research. Pediatric stroke incidence rates may vary markedly depending on which stroke definition is used.

Disparities in intensity of treatment at end-of-life among children according to the underlying cause of death.

AIM: To compare indicators of high-intensity treatment at end-of-life (HI-EOL) among children according to causes of death. METHODS: We conducted a nationwide registry study in Denmark among 938 children of 1-17 years of age who died from natural causes from 2006 to 2016. We identified and compared indicators of HI-EOL within the last month of life across diagnoses. Indicators were hospital admissions, days in hospital, intensive care unit admission, mechanical ventilation, and hospital death. RESULTS: Proportions of each indicator of HI-EOL ranged from 27% to 75%. The most common indicators were hospital death (75%) and ICU admission (39%). Compared to children with solid tumours, children with non-cancerous conditions had an adjusted odds ratio of 3.5 (95% CI 2.1-5.9) of having ≥3 indicators of HI-EOL within the last month of life and children with haematological cancer had an odds ratio of 11.8 (95% CI 6.1-23.0). CONCLUSION: The underlying diagnosis was strongly associated with HI-EOL. Children who died from solid tumours experienced substantially less intensive treatment than both children with haematological cancer and non-cancerous conditions did. Across non-cancerous diagnoses, the intensity of treatment appeared consistent, which may indicate, that the awareness of palliative care is higher among oncologists than within other paediatric fields.

Predictors for place of death among children:A systematic review and meta-analyses of recent literature.

Through a systematic review and meta-analyses, we aimed to determine predictors for place of death among children. We searched online databases for studies published between 2008 and 2019 comprising original quantitative data on predictors for place of death among children. Data regarding study design, population characteristics and results were extracted from each study. Meta-analyses were conducted using generic inverse variance method with random effects. Fourteen cohort studies met the inclusion criteria, comprising data on 106,788 decedents. Proportions of home death varied between countries and regions from 7% to 45%. Lower age was associated with higher odds of hospital death in eight studies (meta-analysis was not possible). Children categorised as non-white were less likely to die at home compared to white (pooled OR 0.6; 95% CI 0.5-0.7) as were children of low socio-economic position versus high (pooled OR 0.7; 95% CI 0.6-0.9). Compared to patients with cancer, children with non-cancer diagnoses had lower odds of home death (pooled OR 0.5; 95% CI 0.5-0.5).Conclusion: Country and region of residence, older age of the child, high socio-economic position, 'white' ethnicity and cancer diagnoses appear to be independent predictors of home death among children. What is Known: • Home is often considered an indicator of quality in end-of-life care. • Most terminally ill children die in hospitals. What is New: • Through a systematic review and meta-analyses, this study examined predictors for place of death among children. • Country and region of residence, older age of the child, high socio-economic position, white ethnicity and having a cancer diagnosis appear to be independent predictors of home death among terminally ill children.

A Nationwide Study of Prevalence Rates and Characteristics of 199 Chronic Conditions in Denmark.

BACKGROUND: Real-world data of disease prevalence represents an important but underutilised source of evidence for health economic modelling. AIMS: The aim of this study was to estimate nationwide prevalence rates and summarise the characteristics of 199 chronic conditions using Danish population-based health registers, to provide an off-the-shelf tool for decision makers and researchers. METHODS: The study population comprised all Danish residents aged 16 years or above on 1 January 2013 (n = 4,555,439). The study was based on the linkage of national registers covering hospital contacts, contacts with primary care (including general practitioners) and filled-in out-of-hospital prescriptions. RESULTS: A total of 65.6% had one or more chronic condition. The ten conditions with the highest degree of prevalence were hypertension (23.3%), respiratory allergy (18.5%), disorders of lipoprotein metabolism (14.3%), depression (10.0%), bronchitis (9.2%), asthma (7.9%), type 2 diabetes (5.3%), chronic obstructive lung disease (4.7%), osteoarthritis of the knee (3.9%) and finally osteoporosis (3.5%) and ulcers (3.5%) in joint tenth place. Characteristics by gender, age and national geographical differences were also presented. CONCLUSIONS: A nationwide catalogue of the prevalence rates and characteristics of patients with chronic conditions based on a nationwide population is provided. The prevalence rates of the 199 conditions provide important information on the burden of disease for use in healthcare planning, as well as for economic, aetiological and other research.

Self-rated health and return to work after first-time stroke.

OBJECTIVE: Self-rated health is an essential aspect of life after stroke, and return to work is considered one of the most important outcomes for younger stroke patients. The aim of this study was to examine whether self-rated health 3 months after stroke, clinical and demographic determinants are independently associated with return to work and subsequent work-stability. MATERIAL AND METHODS: A total of 590 patients with first-time stroke were included from a Danish population-based cohort study. All patients were younger than 60 years and working or unemployed at the time of stroke. Information on self-rated health (Short Form 12; SF-12) was collected from questionnaires 3 months after stroke. Employment status was defined on a weekly basis using national register-data on transfer payments. RESULTS: Fifty percent were self-supporting or job-seeking 12 months after stroke, and the same proportion was found after 24 months. More than 70% of the patients who returned to work did not receive sickness benefits in the 12 months following return to work. Good self-rated health 3 months after stroke and minor stroke severity were strongly associated with return to work after 12 and 24 months. CONCLUSION: Self-rated health 3 months after stroke was strongly associated with return to work and work-stability after stroke.

Determinants of Self-Rated Health Three Months after Stroke.

OBJECTIVES: Self-rated health is an important aspect of life after stroke. The aim of this study was to compare self-rated health in a population of stroke patients to the general Danish population and to analyze to what extent clinical and patient-related factors influence self-rated health 3 months after stroke. METHODS: We sent questionnaires on self-rated health (Short Form-12 Health Survey) to all patients younger than 80 years with first-time stroke admitted to any hospital in the Central Denmark Region between October 1, 2008, and December 31, 2011 (N = 2414). Information on clinical and patient-related determinants of self-rated health was obtained from population-based national health registers. RESULTS: Compared to the general population, stroke patients rated their health lower than the general Danish population. The largest differences were found in domains of physical health, and only minor differences were identified in mental health between the study and the general Danish population. Stroke severity, comorbidity, smoking, educational level, and age were strongly associated with self-reported health. For patients with a "very severe" stroke, the adjusted odds ratios (ORs) of reduced mental health were 1.6 (95% confidence interval [CI]: 1.3-2.6) and 5.1 (95% CI: 2.7-9.6) for low physical health, compared to patients with "mild stroke." Patients with a Charlson Comorbidity Index score of 3 or higher had a higher risk of low mental health (OR 1.9 [95% CI: 1.3-2.6]) and low physical health (OR 2.8 [95% CI: 1.9-4.0]) than patients with no additive diseases. CONCLUSIONS: Stroke had a marked impact of self-rated health, particularly physical health. Higher stroke severity and level of comorbidity were important risk factors of reduced self-rated health.

Predictive value of pediatric thrombosis diagnoses in the Danish National Patient Registry.

Data on the validity of pediatric thrombosis diagnoses are missing. We aimed to examine the predictive value of a diagnosis of venous and arterial thrombosis using the Danish National Patient Registry (DNPR). We identified all first-time diagnoses among children and adolescents (aged 0-18 years) between 1994 and 2006 in DNPR. In total, 1138 potential cases of thrombosis were identified; the medical records were retrieved for 1112 (97.7%) and the positive predictive value (PPV) computed. Overall, the diagnosis of thrombosis was verified in 598 of the 1112 cases, corresponding to a PPV of 53.7% (95% confidence interval [CI]: 50.8-56.7). Diagnoses from wards had the PPV of 62.5% (95% CI: 59.4-65.6). The predictive value of a thrombosis diagnosis from wards was age-dependent, with a higher PPV (77.4%, 95% CI: 68.7-84.7) in neonates (<28 days) and adolescents (15-18 years) (68.2%; 95% CI: 63.2-72.5)) than in children (28 days-14 years) (51.2%; (95% CI: 46.0-56.4)). The PPV of a thrombosis diagnosis was improved by restricting the analysis to diagnoses from wards, primary diagnoses, and admissions with a length of stay of three or more days. The results indicate that an interpretation of nonvalidated hospital discharge data for pediatric thrombosis in a registry like DNPR should be made with caution.

Dimensions of post-stroke fatigue: a two-year follow-up study.

BACKGROUND: The aim of this study was to examine the course of poststroke fatigue in a cohort of first-time stroke patients compared to the general population, and to identify clinically relevant features of post-stroke fatigue. METHODS: We performed a follow-up study of 165 patients with first-time stroke admitted to acute stroke units at the Aarhus University Hospital, Denmark. A reference group of 1,069 persons was sampled from the general population. Fatigue was assessed using the Multidimensional Fatigue Inventory (MFI-20) covering five scales of fatigue (General Fatigue, Physical Fatigue, Reduced Activity, Reduced Motivation, and Mental Fatigue). RESULTS: Compared to the general population, stroke patients reported higher levels of Physical Fatigue. Minor or no differences were found for the other fatigue scales. Pathological fatigue, defined as a score >or=12 on the General Fatigue scale, was reported by 59% (95% CI: 51-66%), 44% (95% CI: 36-51%), 38% (95% CI: 31-46%), and 40% (95% CI: 32-48%) of stroke patients 10 days, 3 months, 1 year, and 2 years following hospitalization for stroke, respectively. Post-stroke fatigue levels decreased after three months and remained stable throughout the remainder of follow-up. Poor functional outcome was consistently associated with increased levels of fatigue. CONCLUSIONS: Post-stroke fatigue is a common condition primarily characterized by increased levels of Physical Fatigue. The pathological mechanisms underlying post-stroke fatigue and its clinical implications require further study.

Stent thrombosis, myocardial infarction, and death after drug-eluting and bare-metal stent coronary interventions.

OBJECTIVES: The aim of the study was to examine outcomes subsequent to implantation of drug-eluting stents (DES) and bare-metal stents (BMS). BACKGROUND: Use of DES might be associated with increased risk of stent thrombosis (ST), myocardial infarction (MI), and death. METHODS: From January 2002 through June 2005, data from all percutaneous coronary interventions in western Denmark were prospectively recorded in the Western Denmark Heart Registry; 12,395 consecutive patients (17,152 lesions) treated with stent implantation were followed for 15 months. Data on death and MI were ascertained from the national databases. The Academic Research Consortium definition of ST was used. RESULTS: The DES were implanted in 3,548 patients (5,422 lesions) and BMS were implanted in 8,847 patients (11,730 lesions). Definite, probable, or possible ST was found in 190 (2.15%) patients in the BMS group and in 64 (1.80%) patients in the DES. The risk of definite ST was similar in the 2 groups (DES: 0.65%; BMS: 0.61%). Very late definite ST (between 12 and 15 months after implantation) occurred more frequently in patients receiving DES (hazard ratio [HR] 10.93, 95% confidence interval [CI] 1.27 to 93.76). Also, the risk of MI between 12 and 15 months after implantation was higher in the DES group (HR 4.00, 95% CI 2.06 to 7.79). Mortality was similar in the 2 groups. Target lesion revascularization was reduced by 43% in patients treated with DES (HR 0.57, 95% CI 0.48 to 0.67). CONCLUSIONS: The minor risk of ST and MI within 15 months after implantation of DES seems unlikely to outweigh the benefit of these stents.