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Table 1 The total numbers, means and standard deviations of ultrasonographic abnormalities of the supraspinous ligament in the three different groups of horses studied.

From: Ultrasonographic evaluation of the supraspinous ligament in a series of ridden and unridden horses and horses with unrelated back pathology

Groups Hypoechoic Mean (SD) Hyperechoic Mean (SD) Total Mean (SD)
G1 (Unridden) 31 2.38 (1.8) 33 2.53 (1.80) 64 4.92 (2.01)
G2 (No pain) 21 1.61 (1.60) 17 1.30 (1.43) 38 2.92 (2.1)
G3 (Pain) 40 3.07 (1.8) 21 1.61 (1.38) 61 4.69 (2.17)
Total 92 2.35 (1.81) 71 1.82 (1.60) 163 4.17 (2.23)
  1. SD = standard deviation