Adaptive Cell Phone Support (ACPS)

Primary outcomes

1. Mean scores on the Mobile Health App Usability Questionnaire

   Time frame: Baseline to 12 weeks

   Higher scores indicate greater ease with which users can use technology to achieve a particular goal; the minimum value of this questionnaire is 1 and the maximum value is 7.

2. Total scores on the theoretical framework of acceptability questionnaire

   Time frame: Baseline to 12 weeks

   Higher scores indicate a greater "extent to which people delivering or receiving a healthcare intervention consider it to be appropriate, based on anticipated or experienced cognitive and emotional responses to the intervention"; the minimum value of this questionnaire is 7 and the maximum value is 35.

3. Total scores on the Visual Analogue Scale

   Time frame: Baseline to 12 weeks

   Percentage of doses taken our of 100%; higher numbers indicate greater medication adherence. This scale presents participants with a line, marked 0 on the left and 100 on the right, and participants can drag a marker to the place on the line that best visually indicated their adherence.

4. Total scores on Rollnick's Readiness Ruler

   Time frame: Baseline to 12 weeks

   Higher scores on this measure indicate more motivation to take medication as prescribed; the minimum value of this questionnaire is 0 and the maximum value is 10.

5. Total Transition Readiness scores on the Successful Transition to Adulthood with Therapeutic = Rx Questionnaire

   Time frame: Baseline to 12 weeks

   Higher scores on extent to which patients are prepared to manage their health condition as adults, outside of the pediatric system; ; the minimum value of this questionnaire is 0 and the maximum value is 90.