SOS right heel SOS left heel   Mean SOS BUA right heel BUA left heel   Mean BUA STI right heel STI left heel   Mean STI
Mean 1536 1538 1537 72.1 72.4 72.2 105.2 106.3 105.7
SD 34 44 37 6.7 7.4 6.8 19.3 24.3 21.1
Median 1532 1534 1536 71.4 71.6 71.2 100.5 101.3 102.7
Variability 2.2% 2.9% 2.4% 9.3% 10.2% 9.5% 18.4% 22.8% 20.0%
SOS: Speed of Sound in m/s; BUA: Broadband Ultrasound Attenuation; STI: Strength Index; SD: Standard Deviation; LSD: Least Significant Difference; CV: Coefficient of Variation; sCV: Standardized Coefficient of Variation
Table 2: Speed of sound (m/s), Broadband ultrasound attenuation (dB/MHz) and Strength Index in the reference population.