Table 3.

Raw and calibrated instrument output recorded during free-living conditions in the field. MTI readings are obtained in third grade children and CSA readings are obtained in ninth grade adolescent. Data are means and standard deviations with 95% CI, and coefficients of variation.

	N	Measured acceleration (Counts*min-1)	SD	CV (%)
Raw MTI output	389	724 (702–745)	219 (205–236)	30.2
Calibrated MTI output	389	724 (702–746)	220 (206–237)	30.4
Raw CSA output	296	446 (428–465)	162 (150–176)	36.3
Calibrated CSA output	296	440 (422–458)	157 (146–171)	35.7

(N equals numbers of children/adolescents)