Table 2.

Questionnaire timings—vibrating notification trigger and completion window times.

Item	Frequency	Trigger time	Window	Question
B1	Twice daily	12:22 PM and 6:22 PM	12:22 PM-4 PM and 6:22 PM-10 PM	Level of knee pain
B2	Daily	5 PM	5 PM-12 AM	Knee pain affecting daily activities
B3	Daily	5 PM	5 PM-12 AM	Knee pain after (important activity A4)
B4	Weekly	Wednesday 12 PM	Wednesday 12 PM-12 AM	Knee pain preventing (painful activity A3)
B5	Weekly	Sunday 12 PM	Sunday 12 PM-12 AM	Quality of life
KOOSa	Monthly	Days 14, 44, 74 from start point	1 week	26 questions from KOOS questionnaire

^aKOOS: Knee injury and Osteoarthritis Outcome Score.