OBJECTIVE: To test the ability of accelerometry to quantify sedentary behavior in 3- to 4-year-old children. RESEARCH METHODS AND PROCEDURES: We developed a cut-off for accelerometry output (validation study) in 30 healthy 3 to 4 year olds, which provided highest sensitivity and specificity for the detection of sedentary behavior relative to a criterion method of measurement, direct observation using the children's physical activity form. We then cross-validated the cut-off in an independent sample of healthy 3 to 4 year olds (n = 52). RESULTS: In the validation study, optimal sensitivity and specificity for the detection of sedentary behavior were obtained at an accelerometry output cut-off of <1100 counts/min. In the cross-validation, sensitivity was 83%: 438/528 inactive minutes were correctly classified. Specificity was 82%: 1251/1526 noninactive minutes were correctly classified using this cut-off. DISCUSSION: Sedentary behavior can be quantified objectively in young children using accelerometry. This new technique could be considered for a wide variety of applications in the etiology, prevention, and treatment of childhood obesity.
OBJECTIVE: To test the ability of accelerometry to quantify sedentary behavior in 3- to 4-year-old children. RESEARCH METHODS AND PROCEDURES: We developed a cut-off for accelerometry output (validation study) in 30 healthy 3 to 4 year olds, which provided highest sensitivity and specificity for the detection of sedentary behavior relative to a criterion method of measurement, direct observation using the children's physical activity form. We then cross-validated the cut-off in an independent sample of healthy 3 to 4 year olds (n = 52). RESULTS: In the validation study, optimal sensitivity and specificity for the detection of sedentary behavior were obtained at an accelerometry output cut-off of <1100 counts/min. In the cross-validation, sensitivity was 83%: 438/528 inactive minutes were correctly classified. Specificity was 82%: 1251/1526 noninactive minutes were correctly classified using this cut-off. DISCUSSION: Sedentary behavior can be quantified objectively in young children using accelerometry. This new technique could be considered for a wide variety of applications in the etiology, prevention, and treatment of childhood obesity.
Authors: L A Kelly; J J Reilly; A Fisher; C Montgomery; A Williamson; J H McColl; J Y Paton; S Grant Journal: Arch Dis Child Date: 2005-10-20 Impact factor: 3.791
Authors: Sara E Schaefer; Rosa Gomez-Camacho; Lisa Martinez; Banafsheh Sadeghi; J Bruce German; Adela de la Torre Journal: J Community Health Date: 2016-04
Authors: Susana Maria Coelho Guimarães Vale; Rute Marina Roberto Santos; Luísa Maria da Cruz Soares-Miranda; Carla Marisa Maia Moreira; Jonatan R Ruiz; Jorge Augusto Silva Mota Journal: Int J Pediatr Date: 2010-07-11