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Table 1 Mean values ± standard deviation and 95% confidence intervals

From: Measurements of the trapezius and erector spinae muscles using virtual touch imaging quantification ultrasound-Elastography: a cross section study

  Total (n = 278) Males (n = 110) Females (n = 168)
Left trapezius [m/s] Mean ± SD 2.78 ± 0.38 2.89 ± 0.38 2.71 ± 0.37
95% confidence interval [2.73–2.83] [2.81–2.96] [2.65–2.77]
Right trapezius [m/s] Mean ± SD 2.75 ± 0.37 2.84 ± 0.41 2.70 ± 0.38
95% confidence interval [2.71–2.80] [2.76–2.92] [2.64–2.76]
Left erector spinae [m/s] Mean ± SD 2.87 ± 0.55 2.97 ± 0.50 2.81 ± 0.57
95% confidence interval [2.80–2.93] [2.87–3.06] [2.72–2.89]
Right erector spinae [m/s] Mean ± SD 2.86 ± 0.57 3.00 ± 0.52 2.77 ± 0.59
95% confidence interval [2.80–2.93] [2.90–3.10] [2.68–2.86]
Thickness left trapezius [mm] Mean ± SD 11.94 ± 3.05 13.47 ± 3.07 10.93 ± 2.59
95% confidence interval [11.58–12.30] [12.89–14.05] [10.54–11.32]
Thickness right trapezius [mm] Mean ± SD 11.95 ± 2.88 13.21 ± 3.03 11.13 ± 2.44
95% confidence interval [11.61–12.29] [12.64–13.79] [10.75–11.50]