Table 2.
Coefficient of variation (CV) of parameters
| Parameter | Animal-to-animal variation | Day-to-day variation | ||
|---|---|---|---|---|
| n = 623 | n = 54 | |||
| Mean ± S.D. | CV (%) | Mean ± S.D. | CV (%) | |
| Animal shape | ||||
| Body Length | 4.34 ± 0.35 | 8.2 | 4.33 ± 0.26 | 6.1 |
| Body Length Contracted | 4.12 ± 0.34 | 8.3 | 4.12 ± 0.26 | 6.3 |
| Body Length Extended | 4.63 ± 0.38 | 8.2 | 4.62 ± 0.27 | 5.9 |
| Time Head Bending | 0.01 ± 0.01 | 107.3 | 0.01 ± 0 | 37.9 |
| Time Body Bending | 0.1 ± 0.07 | 67.8 | 0.1 ± 0.03 | 25.6 |
| Time Bending | 0.11 ± 0.07 | 65.9 | 0.11 ± 0.03 | 24.6 |
| Peristalsis movement | ||||
| Speed | 0.62 ± 0.2 | 32.9 | 0.62 ± 0.15 | 24.7 |
| Time Striding | 0.76 ± 0.13 | 16.7 | 0.76 ± 0.05 | 6.7 |
| Speed Striding | 0.62 ± 0.19 | 30.4 | 0.62 ± 0.14 | 22.7 |
| Stride Duration | 1.61 ± 0.38 | 23.4 | 1.61 ± 0.24 | 14.9 |
| Stride Distance | 0.89 ± 0.16 | 18.4 | 0.89 ± 0.12 | 13.0 |
| Contraction Rate | 0.69 ± 0.14 | 20.9 | 0.69 ± 0.08 | 12.2 |
| Extension Rate | 0.82 ± 0.19 | 22.4 | 0.82 ± 0.11 | 13.4 |
| Stamina | ||||
| Stride Count | 29.91 ± 8.46 | 28.3 | 29.89 ± 5.12 | 17.1 |
| Run Distance | 13.92 ± 8.95 | 64.3 | 13.88 ± 4.66 | 33.6 |
| Run Duration | 23.53 ± 14.78 | 62.8 | 23.48 ± 7.06 | 30.1 |
| Run Stride Count | 14.8 ± 8.83 | 59.6 | 14.77 ± 4.17 | 28.2 |
| Run Count | 2.25 ± 0.93 | 41.4 | 2.25 ± 0.44 | 19.4 |
| Track | ||||
| Distance | 33.55 ± 10.77 | 32.1 | 33.49 ± 8.07 | 24.1 |
| Direction Change | 0.25 ± 0.14 | 56.2 | 0.25 ± 0.06 | 23.5 |
| Time Inside | 0.61 ± 0.24 | 39.0 | 0.61 ± 0.12 | 20.0 |
Animal-to-animal variations: each data point is an animal; n is the number of animals, pooled from all experimental dates. Day-to-day variation: each data point is the mean value from animals tracked on the same day; n is the number of dates. S.D., standard deviation. Bold text, coefficient of variation (CV) <50%.