Fig. 1From: Validity of self-reported out-of-school physical activity among Finnish 11-year-old childrenValidity of physical activity duration (a) and frequency (b) compared to accelerometer measurement. Legend: The box represents the median and interquartile range and the bars represent the range as measured by Kruskal Wallis test. Graphs are presented for accelerometer minutes (min/day). Only the data with observations are shown in Fig. 1 Back to article page