Table A4.

Effect of speed on the cumulative distance versus sampling frequency for Method 2 (decimation). First (shaded) row reports the estimated slope of the cumulative distance traveled versus mean speed using the baseline sensor (1000 Hz). Remaining (unshaded) rows report the estimated differences in this slope for IMUs with the indicated sampling frequency compared to the baseline IMU (i.e., the increased error sensitivity to speed following the indicated reductions in sampling frequency relative to the baseline sampling frequency).

Speed Effect	Estimated Slope (%/(m/s))	p-Value	95% Conf. Int.
Baseline (1000 Hz)	−1.17	<0.001	(−1.50, −0.85)
500 Hz vs. Baseline	−0.01	0.96	(−0.47, 0.45)
250 Hz vs. Baseline	−0.03	0.90	(−0.49, 0.43)
125 Hz vs. Baseline	0.08	0.74	(−0.38, 0.54)
62.5 Hz vs. Baseline	0.12	0.60	(−0.33, 0.58)