Janet M Warren

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Physical inactivity is one of the four leading risk factors for global mortality. Accurate measurement of physical activity (PA) and in particular by physical activity questionnaires (PAQs) remains a challenge. The aim of this paper is to provide an updated systematic review of the reliability and validity characteristics of existing and more recently(More)
Physical activity has a fundamental role in the prevention and treatment of chronic disease. The precise measurement of physical activity is key to many surveillance and epidemiological studies investigating trends and associations with disease. Public health initiatives aimed at increasing physical activity rely on the measurement of physical activity to(More)
The aim of this study was to evaluate the efficacy of an Internet-based weight-loss program for men in an assessor blinded randomized controlled trial. In total, 65 overweight/obese male staff and students at the University of Newcastle (mean (s.d.) age = 35.9 (11.1) years; BMI = 30.6 (2.8)) were randomly assigned to either (i) Internet group (n = 34) or(More)
This paper describes the development, implementation and evaluation of a school- and family-based intervention to prevent obesity in children aged 5-7 years. In addition, the efficacy of three different intervention programmes was compared. Children aged 5-7 years (n=213) were recruited from three primary schools in Oxford and randomly allocated to a(More)
OBJECTIVE To investigate the impact of school garden-enhanced nutrition education (NE) on children's fruit and vegetable consumption, vegetable preferences, fruit and vegetable knowledge and quality of school life. DESIGN Quasi-experimental 10-week intervention with nutrition education and garden (NE&G), NE only and control groups. Fruit and vegetable(More)
This article reports the 12-month follow-up results and process evaluation of the SHED-IT (Self-Help, Exercise, and Diet using Information Technology) trial, an Internet-based weight loss program exclusively for men. Sixty-five overweight/obese male staff and students at the University of Newcastle (Callaghan, Australia) (mean (s.d.) age = 35.9 (11.1)(More)
OBJECTIVES Outcomes of childhood obesity interventions are rarely reported beyond 1 year. We hypothesized that the impact on the BMI z score from a child-centered physical-activity program in combination with a parent-centered dietary-modification program would be greater than either program conducted alone at 24 months' after baseline. PARTICIPANTS AND(More)
AIM To highlight and discuss the practical aspects of conducting high quality, randomised controlled trials (RCTs) with overweight and obese children and their families. CONTENT Realistic considerations and suggestions for researchers arising from the experiences of three Australian interventions in overweight/obese children are highlighted. The practical(More)
OBJECTIVES To assess the effectiveness of dietetic treatment for obese children and to report details of dietary interventions. DATA SOURCES English-language articles from 1975 to 2003 available from health and medical databases. STUDY SELECTION Randomized controlled trials with subjects younger than 18 years of age that included a dietary intervention(More)
OBJECTIVE Recent reports have suggested that a low glycemic index (GI) diet may have a role in the management of obesity through its ability to increase the satiety value of food and modulate appetite. To date, no long-term clinical trials have examined the effect of dietary GI on body weight regulation. The majority of evidence comes from single-day(More)