John N Tsanakas

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RATIONALE Atopic sensitization has long been known to be related to asthma in children, but its role in determining asthma prevalence remains to be elucidated further. OBJECTIVES To investigate the role of atopic sensitization in the large international variation in the prevalence of childhood asthma. METHODS Cross-sectional studies of random samples of(More)
Since the concept of "brain death" was introduced in medical terminology, enough evidence has come to light to show that the concept is based on an unclear and incoherent theory. The "brain death" concept suffers by internal inconsistencies in both the tests-criterion and the criterion-definition relationships. It is also evident that there are residual(More)
BACKGROUND HRQoL in children with asthma depends on multiple factors, among which asthma severity and level of control are believed to play a vital role. The determinants of the connection between asthma severity and asthma control with quality of life remain unclear. AIMS Primary aim of the study was to evaluate the HRQoL in children with asthma and to(More)
Quantitative phenotypes correlated with a complex disorder offer increased power to detect linkage in comparison to affected–unaffected classifications. Asthma is a complex disorder characterized by periods of bronchial obstruction and increased bronchial hyper reactivity. In childhood and early adulthood, asthma is frequently associated also with(More)
Asthma is a complex disease and the intricate interplay between genetic and environmental factors underlies the overall phenotype of the disease. Families with at least two siblings with asthma were collected from Europe, Australia and the US. A genome scan using a set of 364 families with a panel of 396 microsatellite markers was conducted. Nonparametric(More)
Spirometry was performed on 88 children with insulin-dependent diabetes mellitus (IDDM) and 216 healthy controls living in Sheffield. Children with IDDM had significantly lower percentage predicted forced vital capacity (FVC) than did control children or reference norms. There was no evidence that the reduced FVC was confined to a subgroup of children, and(More)
This study was designed to compare the efficacy and safety of a new inhaled corticosteroid, fluticasone propionate at a total daily dose of 200 micrograms, with beclomethasone dipropionate 400 micrograms/day in childhood asthma. A total of 398 asthmatic children (aged 4-19 years) were randomised to receive either fluticasone propionate 200 micrograms daily(More)
BACKGROUND Direct assessment of health-related quality of life (HRQοL) is necessary to understand the impact of a disease on patients' well-being and to evaluate clinical interventions. There is substantial debate in the literature on pediatric health outcomes concerning who is the most appropriate respondent when assessing children's HRQoL. OBJECTIVE To(More)
Inflammatory myofibroblastic tumors (IMTs) are relatively rare entities of a distinct histologic appearance and benign clinical course. Although these lesions have been described in virtually every anatomic location, there are few documented reports with tracheal localization. We add to the short list of pediatric IMTs of the trachea, a 13-year-old boy that(More)