Criterion Validity of a Consumer Wearable for Step Counting and Activity Intensity Classification in Adults With Lung Cancer: Laboratory-Based Validation Study.
BACKGROUND: Consumer wearable activity monitors are increasingly being used as end points in exercise-oncology trials and in clinical decision-making, yet their accuracy is unvalidated in lung cancer, where slow, fragmented gait may challenge step-counting algorithms. OBJECTIVE: This study assessed the criterion validity of the Fitbit Charge 6 device against video-recorded direct observation in adults with lung cancer under controlled laboratory …
