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Table 2
The results of weight-normalized QUS parameters
	wn_SOS (m·s^-1·kg^-1)	wn_nBUA (dB·MHz^-1·cm^-1·kg^-1)	wn_STI
Group 0	32.13 ± 3.10	0.39 ± 0.10	1.72 ± 0.38
Group 1	25.31 ± 3.43^a	0.25 ± 0.06^a	1.13 ± 0.30^a
Group 2	25.48 ± 3.82^a	0.23 ± 0.11^a	1.07 ± 0.42^a
Group 3	26.58 ± 3.88^a	0.20 ± 0.05^a,b	0.94 ± 0.22^a

The prefix ‘wn_’ means “weight-normalized”

^a Significantly different from group 0 (p < 0.001).

^b significantly different from group 1 (p < 0.05).

Liu et al. BMC Musculoskeletal Disorders 2012 13:70 doi:10.1186/1471-2474-13-70

Table 2