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ABCD Youth Fitbit Weekly Physical Activity Summaries

7,076 Shared Subjects

This instrument includes weekly physical activity (and sedentary behavior) for all days with sufficient wear time for inclusion (>600 minutes of daytime wear), including minutes in a variety of activity intensities and steps taken that are broken into weekday only, weekend only, and all days of week.
Clinical Assessments
Activity
04/08/2020
abcd_fbwpas01
10/27/2020
View Change History
01
Query Element Name Data Type Size Required Description Value Range Notes Aliases
subjectkey GUID Required The NDAR Global Unique Identifier (GUID) for research subject NDAR*
src_subject_id String 20 Required Subject ID how it's defined in lab/project
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY
interview_age Integer Required Age in months at the time of the interview/test/sampling/imaging. 0 :: 1260 Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month.
sex String 20 Required Sex of subject at birth M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported
eventname String 60 Required The event name for which the data was collected
fit_ss_protocol_startdate Date Recommended First day of (expected) wear of 3 week protocol fitbit_ss_protocol_startdate
fit_ss_day_wkno Integer Recommended Week number starting from first day of protocol wear fitbit_ss_day_wkno
fit_ss_day_weekend_ind Integer Recommended 0=weekdays only, 1=weekend only, 2=weekday and weekend 0;1;2 fitbit_ss_day_weekend_ind
fit_ss_wk_avg_day_min Float Recommended Average number of minutes of wear not excluded or considered sleep (by 60 second sleep record) Individual day only included if day minutes >599 fitbit_ss_wk_avg_day_min
fit_ss_wk_avg_sleep_min Float Recommended Average number of minutes of wear considered sleep (by 60 second sleep record) not excluded due to HR quality checks Individual day only included if day minutes >599 fitbit_ss_wk_avg_sleep_min
fit_ss_wk_total_steps Float Recommended Sum of steps during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_total_steps
fit_ss_wk_sedentary_min Float Recommended Sum of minutes spent in sedentary (<1.5 METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_sedentary_min
fit_ss_wk_light_active_min Float Recommended Sum of minutes spent in light (1.5-2.9METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_light_active_min
fit_ss_wk_farily_active_min Float Recommended Sum of minutes spent in moderate (3-5.9 METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_farily_active_min
fit_ss_wk_very_active_min Float Recommended Sum of of minutes spent in vigorous (6+ METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_very_active_min
fit_ss_wk_avg_steps Float Recommended Average number of daily steps during day_min during included days Individual day only included if day minutes >599 fitbit_ss_wk_avg_steps
fit_ss_wk_average_met_value Float Recommended Average METS/min during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_average_met_value
fit_ss_wk_avg_sedentary_min Float Recommended Average minutes spent in sedentary (<1.5 METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_avg_sedentary_min
fit_ss_wk_avg_light_active_min Float Recommended Average minutes spent in light (1.5-2.9METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_avg_light_active_min
fit_ss_wk_avg_farily_at_min Float Recommended Average minutes spent in moderate (3-5.9 METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_avg_farily_active_min
fit_ss_wk_avg_very_active_min Float Recommended Average minutes spent in vigorous (>6 METS) activity during day_min on included days Individual day only included if day minutes >599 fitbit_ss_wk_avg_very_active_min
fit_ss_fitbit_rest_hr Float Recommended Average resting heart rate from all included days from the daily level fitbit record Low(er) resting heart rate is usually indicative of a) stronger cardiac muscle/better cardiorespiratory fitness and b) improved (para)sympathetic nervous tone fitbit_ss_fitbit_rest_hr, fitbit_ss_fitbitbit_rest_hr
fit_ss_weekend_count Integer Recommended Number of weekend days included in averages Individual day only included if day minutes >599 fitbit_ss_weekend_count
fit_ss_weekday_count Integer Recommended Number of weekdays included in averages Individual day only included if day minutes >599 fitbit_ss_weekday_count
fit_ss_meet_abcd_rule Integer Recommended 0=no, 1=yes. ABCD inclusion rule is minimum of 4 days, 1 of which must be a weekend day 0;1 Individual day only included if day minutes >599 fitbit_ss_meet_abcd_rule
fit_ss_perday_totalsteps Float Recommended Number of steps per day according to fitbit daily level summary Individual day only included if day minutes >599 based upon ABCD QC record fitbit_ss_perday_total_steps
fit_ss_perday_sedentarymin Float Recommended Average minutes spent in sedentary (<1.5 METS) activity during day_min on included days based upon daily level fitbit record Individual day only included if day minutes >599 based upon ABCD QC record fitbit_ss_perday_sedentary_min
fit_ss_perday_lightlyactivemin Float Recommended Average minutes spent in light (1.5-2.9METS) activity during day_min on included days based upon daily level fitbit record Individual day only included if day minutes >599 based upon ABCD QC record fitbit_ss_perday_lightly_active_min
fit_ss_perday_fairlyactivemin Float Recommended Average minutes spent in moderate (3-5.9 METS) activity during day_min on included days based upon daily level fitbit record Individual day only included if day minutes >599 based upon ABCD QC record fitbit_ss_perday_fairly_active_min
fit_ss_perday_veryactivemin Float Recommended Average minutes spent in vigorous (6+ METS) activity during day_min on included days based upon daily level fitbit record Individual day only included if day minutes >599 based upon ABCD QC record fitbit_ss_perday_very_active_min
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

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