Table 1.

Characteristics of studies included in the review.

Study ID	Author	Date	Technology	Sampling rate (Hz)	Experimental setup	Trial duration (min)	Cohort	Sample size	Age (y)	Box size	N	PD state*	PD score**
1	Marmelat	2018	Footswitches	1,942	Overground	15	Healthy young	15	23 (1.69)	10–N/8	512
1	Marmelat	2018	Footswitches	1,942	Overground	15	Healthy old	14	67.71 (5.92)	11–N/8	512
1	Marmelat	2018	Footswitches	1,942	Overground	15	Patients with PD	13	71.31 (6.12)	12–N/8	512	ON	1.64 (0.69)
2	Dotov	2017	IMU	128	Overground	3	Patients with PD	19	60.8 (10.6)	4–N/4	120–195	ON	2 (1–3)
2	Dotov	2017	IMU	128	Overground	3	Healthy old	19	60.8 (10.6)	4–N/4	120–195
3	Stout	2016	Motion capture	200	Treadmill	15	Healthy young	10	25.2 (1.5)	16–N/9	652
3	Stout	2016	Motion capture	200	Treadmill	15	Healthy old	10	59.6 (10.7)	16–N/9	719
4	Kosse	2016	iPod touch	88–92	Overground	3	Healthy young	29	28 (7)	17–N/7	—
4	Kosse	2016	iPod touch	88–92	Overground	3	Healthy old	30	62 (8)	17–N/7	—
5	Chien	2015	Motion capture	100	Treadmill	5	Healthy young	10	27 (4)	4–N/4	200
5	Chien	2015	Motion capture	100	Treadmill	5	Healthy old	7	70 (10)	4–N/4	200
6	Ota	2014	Foot switches	100	Overground	2–4	Patients with PD	45	69.8 (8.2)	10–N/2	154	ON	1–3
6	Ota	2014	Foot switches	100	Overground	2–4	Healthy old	17	70.2 (2.8)	10–N/2	154
7	Kobsar	2014	IMU	100	Overground	10	Healthy young	41	24 (3)	4–N/2	1,000
7	Kobsar	2014	IMU	100	Overground	10	Healthy old	41	76 (5)	4–N/2	1,024
8	Kaipust	2013	Motion capture	100	Treadmill	6	Healthy young	27	25.7 (3.0)	—	151
8	Kaipust	2013	Motion capture	100	Treadmill	6	Healthy old	27	71.4 (4.4)	—	151
9	Bartsch	2007	Foot switches	100	Overground	2	Healthy old	24	64.3 (1.3)	N/10 s length	~120
9	Bartsch	2007	Foot switches	100	Overground	2	Patients with PD	29	67 (1.3)	N/10 s length	~120	ON	—
10	Warlop	2006	IMU	512	Overground	10	Patients with PD	20	65.3 (9.6)	10–N/2	512	ON	2 (1–3)
10	Warlop	2006	IMU	512	Overground	10	Healthy old	15	60.1 (13.3)	10–N/2	512
11	Toledo	2005	Foot switches	100	Overground	2	Patients with PD	36	61.2 (9.0)	—	—	—
11	Toledo	2005	Foot switches	100	Overground	2	Healthy old	30	57.7 (7.0)	—	—
12	Malatesta	2003	Foot switches	100	Treadmill	6	Healthy old	10	65.3 (2.5)	10–20	—
12	Malatesta	2003	Foot switches	100	Treadmill	6	Healthy young	10	24.6 (2.6)	10–20	—
13	Hausdorff	2000	Foot switches	300	Overground	5	Patients with PD	15	47 (29–71)	10–20	—	ON	1–4
13	Hausdorff	2000	Foot switches	300	Overground	5	Healthy old	16	67 (44–80)	10–20	—
14	Hausdorff	1997	Foot switches	300	Overground	6	Healthy old	10	75.7 (3.2)	10–20	316
14	Hausdorff	1997	Foot switches	300	Overground	6	Healthy young	22	24.6 (1.9)	10–20	315

Reported as mean (standard deviation) or median (lower limit–higher limit).

“—” indicates not reported.

^*Medication state.

^**Hoehn and Yahr scale.