ActiGraph ACTITRAINER Bedienungsanleitung PDF herunterladen (Seite 62)

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Stage 1: Qualification of valid hourly activity data. Stage 1 qualifies hours as either valid or invalid based on

minimum minute-by-minute requirements

Stage 2: Qualification of valid days within a dataset. Stage 2 qualifies days as valid or invalid based on the number

of valid hours in a day determined from Stage 1

Stage3: Qualification of an entire dataset. Stage 3 qualifies an entire dataset as either valid or invalid (turns it red)

based on the number of valid days as determined in Stage 2.

Stage 1: Valid Hourly Activity

Figure 38 – Hour Qualifiers for Wear Time Validation

Each hour in a dataset can be qualified as valid or invalid based on the settings shown in Figure 38. The first option,

“Minimum non-zero epochs per hour required,” sets the requirement for the minimum percentage of non-zero epochs

within an hour. If any hour within that dataset fails to meet that criterion, it is considered invalid. Hours that do meet

this criteria are considered valid wear time hours and count toward the total valid “wear time” used to qualify valid days

(see “Valid Day Activity” below). Alternatively, users can specify the “Consecutive minutes of zeros to be considered

invalid.” This feature works the same way. The “Ignore counts above/below” option allows users to set a minimum

and maximum threshold for “inactivity.” For instance, ignoring counts below 100 means that those epochs with a value

below 100 will be considered “zero” (or inactive). Ignoring counts above 2000 means that epochs with a value above

2000 will be also considered “zero” (or inactive).

Note: Values of ‘0’ in the “Ignore Counts” options cause ActiLife to disregard these criteria.

Epochs will be qualified (valid) if they contain any non-zero value.

Example 1:

- One-Second Epoch Dataset

- Minimum non-zero epochs per hour required: 10%

- Ignore counts below: 100

- Ignore counts above: 5,000

- Beginning at 5:00pm and going until 5:59pm on a given day, 1,000 epochs (1,000 seconds) contain counts that

are between 101 and 4000 counts.

- Between that same time span, the remaining epochs (2,600) contain epochs that are between 0 and 99

- This hour would be considered VALID because 27.8% (1,000/3,600) of the epochs meet the criteria

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ActiGraph ACTITRAINER Bedienungsanleitung Seite 62