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Table 2 Descriptive statics of demographics data for 29 healthy volunteers

From: Paraspinal back muscles in asymptomatic volunteers: quantitative and qualitative analysis using computed tomography (CT) and magnetic resonance imaging (MRI)

  Mininum Maximum Mean Standard deviation Men (n = 14) Women (n = 15) p-value
Age (year) 23.00 50.00 34.31 8.59 33.14 ± 6.83 35.40 ± 10.09 0.81*
Height (cm) 155.00 186.00 169.91 10.18 178.58 ± 6.03 161.81 ± 5.31 < 0.001
Weight (kg) 49.00 94.00 66.97 13.52 77.41 ± 9.41 57.22 ± 8.51 < 0.001
BMI (kg/m2) 19.30 29.40 22.98 2.64 24.27 ± 2.66 21.77 ± 2.01 0.008
Fat fraction (%) 9.69 29.25 18.44 6.39 14.35 ± 3.68 22.53 ± 5.93 < 0.001
HU 25.93 53.45 41.52 7.92 47.43 ± 4.30 36.00 ± 6.38 < 0.001
MR CSA (mm2) 1440.38 2921.77 2013.29 403.08 2297.59 ± 282.26 1729.00 ± 289.29 < 0.001
CT CSA (mm2) 1529.25 3436.73 2172.38 479.15 2519.67 ± 404.06 1848.24 ± 272.74 < 0.001
  1. Using t-test, *using Mann-Whitney U test; BMI Body mass index, HU Hounsfiled unit, CSA Cross sectional area