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An ActTrust 1 actigraphy record

Source: R/acttrust.R
acttrust.Rd

A small sample (1 day length) of an ActTrust (model 1) actigraphy record.

ActTrust is a trademark of Condor Instruments Ltda.

Note: This dataset is based on older methodologies, some of which have since been improved or replaced. For up-to-date recommendations on sleep scoring, please refer to the Brazilian Consensus on Actigraphy (Pedrazzoli & Gonçalves, 2021).

Usage

acttrust

Format

A tsibble with 17 columns and 1,441 rows:

timestamp

Date and time of the recorded events.

R class: POSIXct.

pim

Wrist activity in Proportional Integral Mode (PIM).

R class: numeric.

tat

Wrist activity in Time Above Threshold (TAT) mode.

R class: numeric.

zcm

Wrist activity in Zero Crossing Mode (ZCM).

R class: numeric.

orientation

Device orientation.

R class: numeric.

wrist_temperature

Wrist temperature in degrees Celsius.

R class: numeric.

external_temperature

External temperature in degrees Celsius (unreliable data).

R class: numeric.

light

Light intensity in lux.

R class: numeric.

ambient_light

Ambient light intensity in microwatts/square meter.

R class: numeric.

red_light

Red light intensity in microwatts/square centimeter.

R class: numeric.

green_light

Green light intensity in microwatts/square centimeter.

R class: numeric.

blue_light

Blue light intensity in microwatts/square centimeter.

R class: numeric.

ir_light

Infrared light intensity in microwatts/square centimeter.

R class: numeric.

uva_light

Ultraviolet A light intensity in microwatts/square centimeter.

R class: numeric.

uvb_light

Ultraviolet B light intensity in microwatts/square centimeter.

R class: numeric.

event

A binary number indicating the moments when the subject pressed the event button: 0 when the button is not pressed and 1 when the button is pressed. This is commonly used to indicate when the subject goes to sleep or wakes up.

R class: numeric.

state

An integer number indicating the subject state: 0 for awake, 1 for sleeping, 2 for resting, 4 for offwrist (device removal), 6 for editable state 1, 7 for editable state 2, and 8 for editable state 3. These states can be assigned by a specialist or by a validated inference algorithm.

R class: numeric.

Source

Created by Daniel Vartanian (package author).

Details

This dataset was created by one of the actverse package authors and is free for all kinds of use. You can download the full dataset at: https://zenodo.org/record/4898822

Raw data

The raw data for this dataset can be found by running the following code:

[`get_raw_data("acttrust.txt")`][get_raw_data()].

Data munging

This dataset was processed with the default settings of read_acttrust(). Details about the scoring process can be found in the Metadata section.

Variable naming

Variable names follow the tidyverse style guide, using lowercase letters and underscores to ensure clarity and consistency.

Variable classes

R supports a wide variety of time series data formats. We use tsibble as it aligns well with tidyverse principles and offers a modern, consistent approach to time series data.

To facilitate interoperability with other standards, all variables are stored as numeric vectors except for the index, which is of class POSIXct. This design choice ensures that data from actverse can be easily converted to other formats if needed.

Metadata

Subject

  • Age: 35

  • Gender: Male

  • Height: 180 cm

  • Weight: 85 kg

  • BMI: ~26.235 (overweight)

Record

  • Body part: Left wrist (non-dominant wrist)

  • Start: 2021-04-24 04:14:25

  • End: 2021-05-31 03:39:06

  • Days: 37

  • Epoch (sample interval): 60 seconds

  • Mode: PIM, TAT, and ZCM

  • TAT Threshold: 1024

  • Location: São Paulo, SP, Brazil

  • UTC: -3

  • DST: FALSE

  • Light phase: 06:23:59 - 17:44:58

  • Dark phase: 17:44:59 - 06:23:58

Actigraph

  • Brand: Condor Instruments

  • Model: ActTrust 1

  • Hardware version: 3.1

  • Firmware version: 3.7

  • Manual: 1.0.13 (PT-BR)

  • Software: ActStudio Alpha 1.0.17 (Win | Mac)

Scoring algorithm settings

  • Condor Instruments algorithm version 1.0.17.

  • The sleep diary data was not used for scoring.

Scoring review

  • Offwrist periods were indicated from sudden drops in wrist temperature.

  • Micro sleep states (isolated states lasting less than 5 minutes) were removed.

  • Minor adjustments were made on the sleep onset and sleep offset, taking into consideration the event button and sleep diary records.

Sleep statistics settings

  • Multiple main sleep periods: TRUE.

  • Main sleep period time of day: Day or Night.

  • Minimum duration for main sleep periods: 01:00:00.

  • Awake period limit: 02:00:00.

References

Pedrazzoli, M., Gonçalves, B. da S. B., Benedito-Silva, A. A., Toscanini, A. C., Souza, A. P. P. B. de, Conway, B. A., Vartanian, D., Santos, E. H. R., Pires, M. L. N., & Leocadio-Miguel, M. A. (2021). Consenso brasileiro de actigrafia. Segmento Farma Editores. doi:10.5281/zenodo.15377336