A catalog of validity indices for step counting wearable technologies during treadmill walking: the CADENCE-Kids study

Table 1 Descriptive characteristics of the analytical sample

Variables	All (N = 117)		Children, 6–12 years (n = 53)		Adolescents, 13–17 years (n = 40)		Young Adults, 18–20 years (n = 24)
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Age (years)	13.17	4.22	9.21	1.95	14.93	1.40	19.00	0.83
Weight (kg)	55.94	21.85	41.19	14.67	67.97	21.60	68.43	14.60
Height (cm)	155.66	16.47	141.89	12.44	165.29	8.60	170.01	8.92
Leg length (cm)	73.94	9.42	67.12	8.16	79.10	6.46	80.40	5.41
BMI (kg/m²)	22.41	6.25	20.04	5.17	24.78	7.15	23.66	5.06
	n	%	n	%	n	%	n	%
Sex (female)	59	50.4	26	49.1	21	52.5	12	50.0
BMI classifications^a
Underweight	6	5.1	3	5.7	1	2.5	2	8.3
Normal weight	67	57.3	27	50.9	22	55.0	18	75.0
Overweight	18	15.4	9	17.0	7	17.5	2	8.3
Obese	26	22.2	14	26.4	10	25.0	2	8.3
Race/ethnicity
African-American	41	35.0	21	39.6	13	32.5	7	29.2
Caucasian	73	62.4	30	56.6	26	65.0	17	70.8
Other	3	2.6	2	3.8	1	2.5	0	0.0

BMI body mass index. ^aBMI classifications defined as BMI < 5th percentile (underweight), 5th ≤ BMI < 85th percentile (normal weight), 85th ≤ BMI < 95th percentile (overweight), and BMI ≥ 95th percentile (obese)

ISSN: 1479-5868