Torquil Watt

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We used general population data (n = 4084) to examine data completeness, response consistency, tests of scaling assumptions, and reliability of the Danish SF-36 Health Survey. We compared traditional multitrait scaling analyses to analyses using polychoric correlations and Spearman correlations. The frequency of missing values was low, except for elderly(More)
BACKGROUND Graves' hyperthyroidism is an autoimmune disease causing hyperfunction of the thyroid gland. The concentration of selenium is high in the thyroid gland and two important groups of enzymes within the thyroid are selenoproteins, that is, they depend on selenium. Selenium may have beneficial effects on autoimmune hypothyroidism and on Graves'(More)
PURPOSE We aimed to identify the best approach to work ability assessment in patients with thyroid disease by evaluating the factor structure, measurement equivalence, known-groups validity, and predictive validity of a broad set of work ability items. METHODS Based on the literature and interviews with thyroid patients, 24 work ability items were(More)
BACKGROUND Patients with chronic autoimmune thyroiditis have impaired health-related quality of life. The thyroid gland has a high selenium concentration, and specific selenoprotein enzyme families are crucial to immune function, and catalyze thyroid hormone metabolism and redox processes in thyroid cells. Previous randomized controlled trials have found(More)
BACKGROUND Hypothyroidism is often diagnosed, and subsequently treated, due to health-related quality of life (HRQL) issues. However, HRQL following treatment has never previously been assessed in longitudinal descriptive studies using validated instruments. OBJECTIVE To investigate disease-specific (ThyPRO) and generic (SF-36) HRQL, following(More)
  • G Marshall, T Watt, J Welsh
  • 2001
We present a system for automatic generation and real-time rendering of forested virtual environments. We produce realistic, eroded landscapes and place tree objects in the scene using ecosystem modelling techniques. The tree objects are generated from L-System models to produce closed triangle meshes. These are used to produce a set of discrete level of(More)
factor analysis of the thyroid-related quality of life questionnaire ThyPRO" Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 License. Abstract Background and aim: Thyroid diseases are prevalent and chronic. With treatment, quality of life is restored in most, but not all patients. Construct validity of the(More)
BACKGROUND AND OBJECTIVE Graves' disease has been associated with an increased psychiatric morbidity. It is unclarified whether this relates to Graves' disease or chronic disease per se. The aim of our study was to estimate the prevalence of anxiety and depression symptoms in patients with Graves' disease compared to patients with another chronic thyroid(More)
BACKGROUND AND AIM Thyroid diseases are prevalent and chronic. With treatment, quality of life is restored in most, but not all patients. Construct validity of the thyroid-related quality of life questionnaire, ThyPRO, has been established by multi-trait scaling, but not evaluated with more elaborate methods. The purpose of the present study was to evaluate(More)
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