| Column Heading | Description |
|---|---|
| Sample Time | Date and time encoded as a floating point number, The integer part of number represents the date. The decimal portion represents the time. (Full details at: http://support.microsoft.com/kb/210276) To view the time in Excel, follow this these instructions |
| Time (approx) | For convenience, the date and time accurate to the nearest second. This should not be used for calculations of time diffferences |
| Data Count | Count in 0.1s resolution from the start of the recording |
| Event Type | The event type: 0 – sedentary 1 – standing 2 – stepping (Note: step events are single legged steps, and must be doubled to calculate stepping totals) With the latest classification algorithm, additional event types are available: 2.1 – cycling 3.1 – primary lying 3.2 – secondary lying 4 – non-wear 5 – seated transport |
| Duration | The duration of the event in seconds |
| Waking Day | 0 – events during identified primary time in bed period 1 – events during identified waking day |
| Valid Day | 0 – event is part of validation algorithm identified invalid day 1 – event is part of validation algorithm identified valid day |
| Locus | 1 – event is part of algorithm defined primary locus 2 – event is part of algorithm defined secondary locus 3 – event is part of algorithm locus transition |
| Cumulative Step Count | Cumulative total of all stepping events |
| Activity Score | Activity score in MET.h for each event |
| AbsSumDiffX | Sum of the absolute sample to sample differences on the x axis |
| AbsSumDiffY | Sum of the absolute sample to sample differences on the y axis |
| AbsSumDiffZ | Sum of the absolute sample to sample differences on the z axis |
| Time Upright | Time in upright orientation during the event |
| Time Upside Down | Time in upside down orientation during the event |
| Time Back Lying | Time in back lying orientation during the event |
| Time Front Lying | Time in front lying orientation during the event |
| Time Left Lying | Time in left lying orientation during the event |
| Time Right Lying | Time in right lying orientation during the event |
In addition, aP4+ recordings provide the following outputs:
| Column Heading | Description |
| Heading (degrees) | The per-step average heading in degrees |
| Heading Change (degrees) | The heading change from the previous step in degrees. This is for convenience as it takes into account the discontinuity crossing from 0 to 360 degrees |
| Heading Quality | Percentage heading quality index to indicate calibration errors |
| Height Change (m) | Change in altimeter height from the previous step |