Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Estimation of energy intake (kcal) by children using the PortionSize app |
Percent mean error and Bland-Altman analysis will be performed to determine errors in estimations of energy intake from the PortionSize app compared to estimations of energy intake from the weighed meals (the criterion measure). |
One study visit of ~ 2.5 hours |
|
Primary |
Estimation of intake of food group servings (fruit, vegetable, grain, protein, and dairy) by children using the PortionSize app |
Percent mean error and Bland-Altman analysis will be performed to determine errors in estimations of intake of food group servings from the PortionSize app compared to estimations of food group servings from the weighed meals (the criterion measure). |
One study visit of ~ 2.5 hours |
|
Primary |
Estimation of energy intake (kcal) by parents or caregivers using the PortionSize app |
Percent mean error and Bland-Altman analysis will be performed to assess errors in estimating energy intake using the PortionSize app compared to estimations of energy measured by expert raters via food photography analysis. |
Parents or caregivers will assess food intake of their child (at least one meal and a snack) for two consecutive days at home |
|
Primary |
Estimation of intake of food group servings (fruit, vegetable, grain, protein, and dairy) by parents or caregivers using the PortionSize app |
Percent mean error and Bland-Altman analysis will be performed to assess errors in intake of food group servings using the PortionSize app compared to estimations of food group servings measured by expert raters via food photography analysis. |
Parents or caregivers will assess food intake of their child (at least one meal and a snack) for two consecutive days at home |
|
Secondary |
User satisfaction of the PortionSize app for recording food intake by children |
After completing assessment of food at clinic, children will complete a Likert scale-based survey questionnaire (User Satisfaction questionnaire). The investigators updated a 10-question user satisfaction survey that has been administered in prior studies to quantify satisfaction, ease of use, and adequacy of training for mobile app. The minimum value is 1 and the maximum value is 6 for each question and higher scores indicate a higher outcome. |
One study visit of ~ 2.5 hours |
|
Secondary |
User satisfaction of the PortionSize app for recording food intake by parents or caregivers |
After completing assessment of child's food intake, parents or caregivers will complete a Likert scale-based survey questionnaire (User Satisfaction questionnaire). . The investigators updated a 10-question user satisfaction survey that has been administered in prior studies to quantify satisfaction, ease of use, and adequacy of training for mobile app. The minimum value is 1 and the maximum value is 6 for each question and higher scores indicate a higher outcome. |
Parents or caregivers will assess food intake of their child (at least one meal and a snack) for two consecutive days at home |
|