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Table 4 Safe depths of 23 upper back acupoints in different weight groups

From: Safe needling depths of upper back acupoints in children: a retrospective study

Points <3rd (n = 32) 3–<85th (n = 215) 85–<97th (n = 42) ≥97th (n = 29) P value
Mean ± S.D. Mean ± S.D. Mean ± S.D. Mean ± S.D.
GV9 23.95 ± 5.74 26.00 ± 7.55 29.07 ± 9.61 32.00 ± 13.69 <0.001a
GV10 25.88 ± 5.85 26.45 ± 7.16 30.51 ± 8.18 34.18 ± 13.32 <0.001a
GV11 24.98 ± 5.10 26.41 ± 6.55 29.28 ± 8.97 34.25 ± 12.74 <0.001a
GV12 27.58 ± 6.53 28.12 ± 6.65 32.47 ± 9.81 38.48 ± 19.01 <0.001a
GV13 30.21 ± 8.23 31.25 ± 8.44 35.47 ± 9.16 40.42 ± 16.13 <0.001a
GV14 31.31 ± 9.68 31.66 ± 9.36 34.88 ± 12.04 38.63 ± 16.11 0.004a
BL11 29.99 ± 9.18 30.87 ± 8.57 33.96 ± 10.81 37.51 ± 16.68 0.003a
BL12 33.08 ± 9.92 33.58 ± 8.33 36.21 ± 8.89 39.23 ± 12.94 0.007a
BL13 26.25 ± 4.70 26.96 ± 4.99 29.26 ± 6.82 33.51 ± 12.84 <0.001a
BL14 21.86 ± 5.44 23.45 ± 6.48 25.99 ± 8.42 28.99 ± 12.37 <0.001a
BL15 22.86 ± 4.42 24.13 ± 5.20 27.28 ± 6.72 29.73 ± 10.12 <0.001a
BL16 21.36 ± 5.25 22.50 ± 5.90 25.42 ± 7.59 28.89 ± 10.86 <0.001a
BL17 22.23 ± 4.57 24.13 ± 6.07 26.70 ± 6.78 29.35 ± 9.86 <0.001a
BL41 26.45 ± 5.32 29.14 ± 7.03 31.83 ± 10.67 36.77 ± 15.45 <0.001a
BL42 24.59 ± 5.71 26.38 ± 6.55 29.53 ± 6.86 35.74 ± 15.50 <0.001a
BL43 22.17 ± 4.95 23.00 ± 5.34 26.11 ± 8.25 30.98 ± 13.86 <0.001a
BL44 17.10 ± 4.24 19.06 ± 6.13 22.28 ± 8.10 25.90 ± 13.45 <0.001a
BL45 15.01 ± 4.16 17.28 ± 5.57 20.52 ± 7.03 24.72 ± 11.74 <0.001a
BL46 15.41 ± 4.58 16.80 ± 4.87 20.12 ± 6.69 23.66 ± 12.14 <0.001a
SI14 31.64 ± 9.57 33.98 ± 9.68 37.57 ± 12.13 45.52 ± 20.78 <0.001a
SI15 35.12 ± 10.03 36.39 ± 10.09 38.22 ± 12.86 45.15 ± 18.52 0.001a
GB21 25.40 ± 9.45 26.32 ± 7.88 31.09 ± 9.68 33.27 ± 13.27 <0.001a
SP21 17.97 ± 4.26 18.83 ± 4.12 20.26 ± 4.15 22.46 ± 5.89 <0.001a
  1. Unit of mean ± SD: mm
  2. aStatistically significant