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.