Table 2.

Raw and calibrated instrument output derived through repeated measurements in setting #2 in the mechanical setup. Data are Means and standard deviations with 95% CI, and coefficients of variation

	N	Measured acceleration (counts*min-1)	SD	CV (%)
Raw MTI output	340	5160 (5137–5184)	221 (206–239)	4.3
Calibrated MTI	340	5155 (5142–5169)	127 (118–138)	2.5
Raw CSA output	407	5025 (4990–5061)	361 (338–388)	7.2
Calibrated CSA output	407	4927 (4913–4940)	137 (128–147)	2.8

(N equals the total number of repeated quality checks in setting #2)