Figure 3.

Comparison between each ASD subject’s performance in the PPA tests of lower limb strength and age-matched reference values (percentiles) for TD subjects. Light gray to dark gray corresponds with better to worse performance. In (a) ankle dorsiflexion force, in (b) knee extension force, in (c) knee flexion force. The reference value of the 10th, 50th and 90th percentiles and each ASD subject values are reported. Intervals for each performance represent: ≤ 10th, 10th < x ≤ 50th, 50th < x ≤ 90th, >90th percentile from the top to the bottom, respectively. * indicates the percentile scale was inverted, i.e., for all items a score over the 90th percentile is an indicator of a worse performance. Abbreviations: yrs, years; kg, kilograms.