Table 3.

Reproducibility of quantitative ultrasound technique

Study	Year	Equipment name/model	Number of patients	Intraobserver coefficient variant (%)	Interobserver coefficient variant (%)	Instrumental precision coefficient variant (%)	Intersite variation coefficient variant (%)
Mercy et al. [2]	2007	Omnisense 7000P	84			1.26
McDevitt et al. [8]	2007	Omnisense 7000P	39	1.1	1.2
Zuccotti et al. [13]	2011	Omnisense 7000P	116			0.34
Gonnelli et al. [15]	2004	DBM Bone Profiler	140			1.0
McDevitt et al. [20]	2005	Omnisense 7000P	110	1.2			2.4
Rack et al. [23]	2012	Osteon KIV	172			0.62
Fewtrell et al. [25]	2008		99	1–2
Littner et al. [31]	2003	Omnisense 7000P	73	<1.2
Rubinacci et al. [32]	2003	DBM Sonic 1200	94			1.76 (standardised)
Littner et al. [34]	2005	Omnisense 7000P	22	<1.2
Liao et al. [38]	2010	Omnisense 7000P	267	1.23–1.84