Joanna Yuet-Ling Tung1,2, Frederick Ka-Wing Ho2,3, Keith Tsz-Suen Tung2, Rosa Sze-Man Wong2, Wilfred Hing-Sang Wong2, Bik-Chu Chow4, Patrick Ip5. 1. Department of Paediatrics, Hong Kong Children's Hospital, Kowloon , Hong Kong. 2. Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, LKS Faculty of Medicine, The University of Hong Kong, Room 123, New Clinical Building, 102 Pokfulam Road, Pok Fu Lam, Hong Kong. 3. Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK. 4. Department of Sports and Physical Education, Hong Kong Baptist University, Kowloon Tong, Hong Kong. 5. Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, LKS Faculty of Medicine, The University of Hong Kong, Room 123, New Clinical Building, 102 Pokfulam Road, Pok Fu Lam, Hong Kong. patricip@hku.hk.
Abstract
BACKGROUND: Little is known about the progression of obesity from childhood to adolescence. This study aimed to longitudinally examine the obesity status in a cohort of children across their childhood and adolescence, and to identify the factors associated with persistent obesity. METHODS: The study used data from School Physical Fitness Award Scheme (SPFAS), a population-based programme in Hong Kong primary and secondary schools. Students were included if they participated in the SPFAS in both 2014 (Primary 1 and 2) and 2018 (Primary 5 and 6). Their anthropometric and physical fitness parameters were analyzed. RESULTS: A total of 18,863 students were included. The baseline prevalence of obesity was 5.7 %. After 4 years, the prevalence increased to 6.7 %. Among those with obesity at baseline, 35.3 % remained obese after 4 years. The addition of baseline physical fitness level did not improve the prediction for persistent obesity. CONCLUSIONS: One-third of obese students in junior primary school remained to be obese into adolescence. Their baseline physical fitness level did not improve the predictive value for future obesity. Further studies should investigate the prognostic factors that may influence the natural course of childhood obesity.
BACKGROUND: Little is known about the progression of obesity from childhood to adolescence. This study aimed to longitudinally examine the obesity status in a cohort of children across their childhood and adolescence, and to identify the factors associated with persistent obesity. METHODS: The study used data from School Physical Fitness Award Scheme (SPFAS), a population-based programme in Hong Kong primary and secondary schools. Students were included if they participated in the SPFAS in both 2014 (Primary 1 and 2) and 2018 (Primary 5 and 6). Their anthropometric and physical fitness parameters were analyzed. RESULTS: A total of 18,863 students were included. The baseline prevalence of obesity was 5.7 %. After 4 years, the prevalence increased to 6.7 %. Among those with obesity at baseline, 35.3 % remained obese after 4 years. The addition of baseline physical fitness level did not improve the prediction for persistent obesity. CONCLUSIONS: One-third of obese students in junior primary school remained to be obese into adolescence. Their baseline physical fitness level did not improve the predictive value for future obesity. Further studies should investigate the prognostic factors that may influence the natural course of childhood obesity.
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