Key Concepts about Creating Person Level Summary Metrics
At this point in the tutorial, we have classified each of the 10080 data points per study participant by wear vs. non-wear time, intensity, and bouts of activity at a given intensity. These metrics are described for each day of the study period. To simplify our analysis and provide useful summaries of the data, it is helpful to translate day-level data to person-level data. In this way, we will calculate the daily average for each summary metric over the number of valid days of data collection per study participant.