Trial Outcomes & Findings for Effect of Changing Sedentary Behavior in Youth (NCT NCT00962247)

Families were recruited from the Buffalo NY area. 460 families were interested in screening for the study with 271 ineligible families, 4 families who were no longer interested and 28 families who withdrew from phone screen, for a total of 157 families eligible for an orientation appointment.

Prior to enrolling in the protocol, families completed an orientation, at which eligibility and interest were assessed. Families who enrolled, first completed three weeks of monitoring on the Television reduction device to determine eligibility (at least 18 hours/week of screen use) and compliance with physical activity accelerometer use.

Effect of Changing Sedentary Behavior in Youth

Actigraph activity monitors were used to record physical activity over 3 days, in addition to a weekly physical activity diary. Acti-graph counts were used to estimate energy expenditure during waking hours. Counts per minute describes the average rate of counts, with 0 being at rest and higher numbers indicating more vigorous physical activity.

Resting metabolic rate was calculated using the activity data from accelerometer (Actigraph) collection. Resting metabolic rate was used to calculate estimated daily energy expenditure. Daily energy expenditure and weight change over the study period was used to estimate energy intake. If weight was stable of the nine weeks, assume energy intake = energy expenditure. A gain of a pound was estimated as equivalent to a positive balance of 3500 calories and a loss of a pound was estimated as equivalent to a negative balance of 3500 calories.