Table 2. Walk ratio and other gait parameters according to level of psychological symptoms (SDQ) among early adolescents. SDQ N Mean (SD) Mean Difference 95% Confidence Interval P Value Walk Ratio[mm/(steps/min)] Close to average 52 6.7(0.8) Referent Referent Referent Slightly raised 12 5.9(1.1) -0.7* -1.3, -0.2 0.006 High 6 6.3(0.6) -0.4 -1.1, 0.3 0.275 Very high 10 5.8(0.6) -0.8* -1.4, -0.3 0.004 Cadence [steps/min] Close to average 50 112.2(5.9) Referent Referent Referent Slightly raised 10 112.7(8.3) 0.5 -3.9, 4.9 0.826 High 6 112.5(7.9) 0.3 -5.2, 5.8 0.917 Very high 10 120.2(6.0) 8.1* 3.6, 12.5 0.001 Step time [ms] Close to average 50 539.4(27.8) Referent Referent Referent Slightly raised 10 538.0(40.4) -1.4 -22.1, 19.3 0.893 High 6 537.4(36.7) -2.1 -27.8, 23.7 0.873 Very high 10 501.9(23.9) -37.6* -58.2, -16.9 0.001 Vigorous activity proportion in total time [%] Close to average 50 0.6 (0.5) Referent Referent Referent Slightly raised 10 0.4(0.3) - 0.2 -0.4, 0.04 0.107 High 6 0.2 (0.2) - 0.3* -0.7, -0.01 0.044 Very high 10 0.2(0.1) - 0.3* -0.6, -0.03 0.012 Vigorous activity proportion in activity level [%] Close to average 50 2.7 (2.0) Referent Referent Referent Slightly raised 10 1.8 (0.7) -0.9 -2.1, 0.3 0.066 High 6 0.9 (0.8) -1.9* -3.4, -0.4 0.017 Very high 10 1.3 (1.2) -1.4* -2.6, -0.2 0.011 SDQ: Strengths and Difficulties Questionnaire. * The mean difference is significant at the 0.05 level.