There was no significant correlation between absolute or vigorous physical activity levels at baseline and age (Spearman’s

rho = 0.02 and 0.02, respectively, Fig. 2a and 2b), nor was there any correlation between incidence rate of bleeds and level of absolute or vigorous physical activity at baseline (Spearman’s rho = 0.05 and 0.07, respectively, Fig. 3a and 3b). The median level of physical activity for Australian children with haemophilia is 7.9 h/week including 3.8 h spent engaged in vigorous physical activity selleck products (>6 METS). The median small-screen time per day is 2.5 h. There was no correlation between age of the child and habitual physical activity nor was there any correlation between bleeding rate and level of physical activity at baseline. Only 43% of all children with haemophilia www.selleckchem.com/products/AC-220.html and 44% of those over the age of 10 years met the Australian government guidelines for physical activity compared with 57% (winter) to 67% (summer) of healthy peers [28]. Twenty-three per cent (10/43) of children with haemophilia over the age of 10 years and 27% of healthy peers met the Australian government guidelines for small-screen time in children [28]. Not surprisingly, for children with haemophilia, the proportion of time spent in high risk Category 3 activities is low. This study used two methods for assessing physical activity – an

activity questionnaire which was retrospective and a one-week physical activity diary which was prospective and occurred at a randomly generated time. The

habitual activity questionnaire has been validated for use in adolescents and details of involvement in physical activity, including type of activity, frequency and duration of sessions enable estimation of time spent in vigorous physical activity in addition to overall time spent in physical activity. It is, however, subject to recall bias as children or their parents are asked to recall patterns of physical activity over a 12 month period. The prospective activity diary is likely to have been subject to relatively little recall bias. One of the limitations of the prospective activity diary was the follow-up MCE公司 rate. Only 66/104 (63.5%) returned their activity diaries so it is possible that data from the prospective activity diaries are subject to selection bias. The timing of the prospective activity diaries was randomly generated to avoid possible bias created by the differing types and levels of physical activity during different seasons of the year. The target population for this study was similar to populations from other developed countries where the majority of children receive prophylactic clotting factor. Other studies that have examined levels of physical activity in children with haemophilia have returned different results to those reported here. In many instances this reflects the availability of clotting factor concentrates in the countries in which the studies were performed.