PAactivPAL (version 2.0)

Sedentary: Sedentary Physical Activity Summary

Description

Summarize sedentary features using proportions and percentiles

Usage

Sedentary(final_dat, bed_time, takeoff_time)

Arguments

final_dat

Raw event file, will be cleaned in this function. Event file is required for this function.

bed_time

Sleep and wake up time log, reported by participants. Log is not required for this function.

takeoff_time

Take on and off time log, reported by participants. Log is not required for this function.

Value

Year The calendar year of recorded eventMonth The calendar month of recorded eventDay The calendar day of recorded eventDayofweek The day of that weekWeekday_or_weekend The recored event date is a weekday or weekend (0 for weekday, 1 for weekend)break_per_day Number of interrupting sedentary behavior during the given period of timebreak_rate Rate of interrupting sedentary behaviormean_sed_bout_length Mean sedentary bout length. It is the average of the duration time for all sedentary activitiesprop_of_sed_time_greater_20min Proportions of sedentary bout greater than 20 minutesprop_of_sed_time_greater_60min Proportions of sedentary bout greater than 60 minutesprop_of_sed_time_greater_120min Proportions of sedentary bout greater than 120 minutestotal_sed_time_greater_20min Total sedentary time greater than 20 minutestotal_sed_time_greater_60min Total sedentary time greater than 60 minutestotal_sed_time_greater_120min Total sedentary time greater than 120 minutespercentile_sed_time_5 5% Percentile of sedentary timepercentile_sed_time_25 25% Percentile of sedentary timepercentile_sed_time_50 50% Percentile of sedentary timepercentile_sed_time_75 75% Percentile of sedentary timepercentile_sed_time_95 95% Percentile of sedentary timealpha_sed alpha of sedentary time, see detailsprop_sed_time_6_12 Proportions of sedentary time between 6:00-12:00prop_sed_time_12_18 Proportions of sedentary time between 12:00-18:00prop_sed_time_18_22 Proportions of sedentary time between 18:00-22:00sed_time_in_30_and_60 Minutes Spent in Sitting/Lying Bouts (at least 30 and less 60 minutes in duration)sed_num_in_30_and_60 Number of in Sitting/Lying Bouts (at least 30 and less 60 minutes in duration)

Details

Proportions of sedentary bout greater than 20/60/120 minutes is the ratio of the number of sedentary bouts greater than 20/60/120 minutes to the total number of sedentary recordings.

Total sedentary time greater than 20/60/120 minutes is the summation of the sedentary durations which are greater than 20/60/120 minutes.

To calculate 5%/25%/75%/95% percentile of sedentary time, all of the recorded sedentary durations are listed and R function quantile is used to find the percentiles.

alpha_sed is defined by 1+1/M, where M is the average of log(sedentary bout length /minimum sedentary bout length).

Proportions of sedentary time between 6:00-12:00/12:00-18:00/18:00-22:00 is the ratio of the sedentary durations to the total activity durations between 6:00-12:00/12:00-18:00/18:00-22:00.

Examples

#For CRAN less than 5s running time policy, we only select the first day to run.
r2=Sedentary(sample_event[1:3095,],sample_bed_time[1,],sample_takeon_log[1,])
summary(r2)