Rütten et al. [ 4] compared IPAQ results with other European studies and PA in the IPAQ-S7T and Germany had the highest median of vigorous PA, 26 min -1.
The median durations for vigorous and moderate activity were both 45 min/week, considerably below the DHHS recommendation of 150 min/week of moderate activity or 75 min/week of vigorous activity for chronic disease prevention (19).
We use a 3-s epoch because this duration approximates the mean and median duration of vigorous activity bouts observed in young children [ 24] and, based on our pilot work, accurately captures physical activity intensity [ 25].
Over the past 25 years and despite vigorous basic and clinical studies, the median survival of patients with GBM remains low.
The median duration of moderate-vigorous physical activity per day by accelerometer, when only including bouts of at least 10 minutes, was similar between the physical activity (7.5 minutes, interquartile range 0-15.5 0-15.5ontrol groups (8.0 minutes, 0-16.2), P=0.816).
A Wilcoxon Signed Ranks Test revealed no significant change (p = 0.31), based on negative ranks, but the median minutes of moderate and vigorous physical activity more than doubled.
Engagement in at least some level of activity based on reported number of moderate-to-vigorous activity bouts was dichotomized at their median and classified as "low" or "high".
The median time spent at moderate and vigorous activity in the third, second and the first quintiles were 52, 74 minutes and 111 minutes, respectively.
These results are lower than those reported in the International Prevalence Study conducted in 20 countries worldwide using the same instrument as ours (median 33% and 40% for moderate and vigorous activity, respectively) [ 20].
The median time spent on moderate-to-vigorous intensity PA in our study was 223 min/wk as measured with accelerometers.
Both the highly obese and underweight groups had noticeably lower levels of moderate-vigorous physical activity (67.6% and 66.7% below median 18.9 MET-hours/week, respectively), in contrast to the other BMI groups that had higher (normal weight) or similar (overweight and mildly obese) levels relative to the median level.
