Research Article

The Dimensionless Squared Jerk: An Objective Parameter That Improves Assessment of Hand Motion Analysis during Simulated Shoulder Arthroscopy

Table 1

The mean of the 10 performances stratified by participant and group (novice versus consultant). Wilcoxon-Mann-Whitney Test p values between groups. Min. acc.: minimum acceleration; Avg. acc.: average acceleration; Nov: novice. = statistically highly significant. = statistically significant.

ā€‰Time taken (s)Average acceleration (m/s2)Maximum acceleration (m/s2)No. of movements (>10m/s2)No. of movements (min. acc.)No. of movements (avg. acc.)Total path length (m)Range of acceleration (m/s2)DSJ
NovExpert NovExpert NovExpert NovExpert NovExpert NovExpert NovExpert NovExpert NovExpert

162.2941.860.560.4514.375.1713.910.0014463.1610040.203657.003068.7015.528.8614.375.173.032.83
274.7352.320.830.4744.735.6927.200.0011336.0012552.603008.103805.7016.4710.5444.735.696.615.32
343.4646.150.520.998.2885.620.0041.3013545.2011454.603899.103508.4013.9213.368.2885.623.841.82
455.9954.150.611.1321.4329.8019.215.2016964.5612989.504780.303351.6013.0522.3721.4329.805.312.08
551.8451.840.481.806.2038.060.004.8012844.0012435.303865.803226.2010.6928.416.2038.064.891.99
687.6063.531.190.6296.2819.4324.302.2020873.3014395.505667.303619.0029.9929.4396.2864.1315.221.76
Mean62.5651.640.700.9131.8830.6314.108.9215004.3712311.284146.273429.9316.6118.8331.8838.086.482.63
Standard deviation19.4010.730.530.58104.6937.8232.1317.774653.712574.731291.92568.006.869.01104.6947.215.752.06
p value<0.0010.050*0.5450.371<0.001<0.0010.3950.046<0.001