Table 3.
Sample data used for the development of cut-points, including number of observations, median and confidence interval of ActiGraph counts in the non-ambulation and walking test conditions for the waist and ankle vertical and vector magnitude counts.
| 15 s Epoch | ||||||
|---|---|---|---|---|---|---|
| Waist | Ankle | |||||
| n | Median (95% CI) | n | Median (95% CI) | |||
| Vertical | VM | Vertical | VM | |||
| Non-amb. | 107 | 0 (7–39) |
0 (15–70) |
93 | 0 (7–22) |
0 (15–39) |
| 0.41–0.8 m/s | 20 | 338 (283–441) |
519 (495–790) |
16 | 912 (724–1421) |
1394 (1135–1890) |
| 0.81–1.2 m/s | 28 | 423 (341–477) |
759 (621–847) |
24 | 1898 (1444–2140) |
2546 (2021–2774) |
| >1.2 m/s | 22 | 555 (456–653) |
1147 (976–1285) |
15 | 3456 (2961–4354) |
4045 (3479–4876) |
| 1 min Epoch | ||||||
| Non-amb. | 107 | 17 (41–157) |
44 (78–280) |
93 | 14 (41–89) |
37 (78–158) |
| 0.41–0.8 m/s | 20 | 1204 (997–1634) |
1908 (1735–2932) |
16 | 3496 (2593–5287) |
5393 (4029–7064) |
| 0.81–1.2 m/s | 28 | 1628 (1265–1793) |
2758 (2287–3181) |
24 | 6777 (5265–8037) |
9660 (7392–10,474) |
| >1.2 m/s | 22 | 2099 (1580–2450) |
4244 (3348–4839) |
15 | 13,178 (10,023–16,569) |
15,576 (11,774–18,619) |
Abbreviations: Non-amb (non-ambulation), n (numbers), CI (confidence interval), m/s (meter per second), and VM (vector magnitude counts).