. Author manuscript; available in PMC: 2021 Mar 1.

Published in final edited form as: IEEE J Biomed Health Inform. 2019 Jun 11;24(3):878–884. doi: 10.1109/JBHI.2019.2922178

Table I.

Summary of 17 types of feature collected from Fitbit per day

Type (units)	Mean ± Std
Steps (#)	6138 ± 4031
Total Distance (kilometers)	4.18 ± 3.00
Tracker Distance^* (kilometers)	4.18 ± 3.00
Logged Activity Distance^* (kilometers)	0.02 ± 0.56
Very Active Distance (kilometers)	0.71 ± 1.49
Moderate Active Distance (kilometers)	0.36 ± 0.60
Light Active Distance (kilometers)	2.69 ± 1.90
Sedentary Active Distance^* (kilometers)	0.01 ± 0.08
Very Active Minutes	12.21 ± 22.29
Fairly Active Minutes	12.78 ± 21.89
Light Active Minutes	176.81 ± 99.73
Sedentary Minutes	823.24 ± 323.90
Calories	2032 ± 610
Floor (#)	5.1 ± 11.8
Calories BMR (basal metabolic rate)	1428 ± 254
Marginal Calories	372 ± 317
Resting Heart Rate (BPM)	61.81 ± 7.45

means that feature was eliminated for model input because it was highly sparse or redundant.