mHealth Physical Activity Intervention for Survivors of Adolescent and Young Adult Cancers

Number of participants who agreed to participate divided by the number of months of recruitment.

Percentage of eligible participants who agreed to participate.

Number of intervention participants who completed 3-month measures divided by the number who consented to participate.

Number of intervention participants who completed 6-month measures divided by the number randomized to the intervention group.

Ratings of satisfaction with the intervention, as measured by satisfaction questionnaire.

Number of days physical activity tracked, as measured by Fitbit.

Change in objective levels of physical activity, as measured by accelerometry (Actigraph), from baseline to 3 months, and 3 months to 6 months.

Change in self-report levels of physical activity, as measured by the Godin Leisure Time Exercise Questionnaire, from baseline to 3 months, and 3 months to 6 months.

Change in self-report levels of sedentary behavior, as measured by the Marshall Sitting Time Questionnaire, from baseline to 3 months, and 3 months to 6 months.

Change in self-reported weight, from baseline to 3 months, and 3 months to 6 months.

Change in intrinsic motivation, as measured by the intrinsic motivation subscale of the Treatment Self-Regulation Questionnaire for Exercise, from baseline to 3 months, and 3 months to 6 months. Responses to four items comprising intrinsic motivation subscale are averaged to yield a score from 1 to 7, with higher values representing higher intrinsic motivation.

Change in self-efficacy for exercise, as measured by the Self-Efficacy and Exercise Habits Survey, from baseline to 3 months, and 3 months to 6 months. Responses for two subscales (Sticking to it, Making time for exercise) are averaged to yield a score from 1 to 5, with higher values representing higher self-efficacy for exercise.

Change in social support for exercise, as measured by the Social Support for Exercise Survey, from baseline to 3 months, and 3 months to 6 months. Responses for three factors (Family participation, Friend participation, Friends on social networking sites participation), ranging from 1 to 5, are summed, with higher values representing higher social support for exercise.

Change in posttraumatic growth, as measured by the Short Form of the Posttraumatic Growth Inventory, from baseline to 3 months, and 3 months to 6 months. Responses range from 0 to 5 and yield an overall score and subscale scores for relating to others, new possibilities, personal strength, spiritual change, and appreciation of life. Items are summed, with higher scores reflecting more positive change (i.e., posttraumatic growth).

Changes in positive psychosocial impact of illness, as measured by the PROMIS Psychosocial Illness Impact - Positive (4a), from baseline to 3 months, and 3 months to 6 months. Responses to the 4-item short from range from 1 to 5. Items are summed, with higher scores reflecting more positive psychosocial impact.

Changes in positive psychosocial impact of illness, as measured by the PROMIS Psychosocial Illness Impact - Negative (4a), from baseline to 3 months, and 3 months to 6 months. Responses to the 4-item short from range from 1 to 5. Items are summed, with higher scores reflecting more negative psychosocial impact.

Changes in positive affect, as measured by the NIH Toolbox Positive Affect Short Form, from baseline to 3 months, and 3 months to 6 months.

Changes in positive affect, as measured by the Network Orientation Scale, from baseline to 3 months, and 3 months to 6 months. Responses to 20 items range from 1 to 4. Items are summed (range: 20 to 80), with higher scores representing a more negative social network orientation.