Table 1.

Age and results values of stiffness measured by shear-wave elastography.

Group	Mean ± SD	Median (IQR)
Total
Age (year)	10.87 ± 3.38	12.00 (9.25–13.00)
Left masseter (kPa)	6.47 ± 0.78	6.33 (6.11–7.04)
SD of left masseter	1.45 ± 0.42	1.41 (1.11–1.63)
Right masseter (kPa)	6.24 ± 0.76	6.30 (5.58–6.71)
SD of right masseter	1.41 ± 0.52	1.40 (0.91–1.83)
Girls
Age (year)	10.28 ± 4.16	11.50 (8.25–13.00)
Total value (kPa)	6.63 ± 0.80	6.68 (6.10–7.13)
Left masseter (kPa)	6.72 ± 0.85	6.87 (6.17–7.13)
SD of left masseter	1.62 ± 0.42	1.60 (1.37–1.70)
Right masseter (kPa)	6.54 ± 0.77	6.63 (5.87–6.77)
SD of right masseter	1.61 ± 0.53	1.73 (1.00–2.03)
Boys
Age (year)	11.75 ± 1.42	12.00 (11.00–13.00)
Total value (kPa)	5.94 ± 0.50	6.12 (5.55–6.30)
Left masseter (kPa)	6.09 ± 0.46	6.17 (6.10–6.31)
SD of left masseter	1.20 ± 0.30	1.12 (1.06–1.31)
Right masseter (kPa)	5.80 ± 0.52	5.67 (5.50–6.30)
SD of right masseter	1.10 ± 0.33	0.92 (0.86–1.40)