Actiwatch data quality check

Goal

The goal of quality_check() is screen the recorded Actiwatch data and flag outlying values that require further investigation. This document will provide an overview of how to use quality_check() appropriately based on the Pregnancy 24/7 study and data structures.

Load the package

To screen the Actiwatch data to the specifications of the study, use the library() command to load the pregnancy247 package, as shown below.

library(pregnancy247)

This allows the user to access all of the available functions present in the package, such as quality_check(), without a direct reference to the functions, pregnancy247::quality_check().

Set the working directory

The quality_check() function uses the read_msleep(), check_msleep(), write_msleep(), and write_all_msleep() functions, and requires that the working directory is set to the directory containing the data of each subject within subject-specific folders based on IDs. It is also assumed the names of the folders in subject-specific directories are

• Visit 1,
• Visit 2, and
• Visit 3.

The requirement of the working directory and file system is based on the needs of the Pregnancy 24/7 study team located at the University of Pittsburgh. Thus, to alter this requirement adjust the dependencies of the file system in the read and write functions. If RStudio is being used, the working directory may be set by the following.

1. Select the Session tab in the toolbar
2. Navigate to Choose Directory … listed within Set Working Directory
3. Navigate the file explorer to the main data processing folder