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Table 5 Safe depth of 23 upper back acupoints of BMI groups

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

Points Underweighta (n = 52) Healthy weightb (n = 186) Overweightc (n = 18) Obesityd (n = 30) P value
Mean ± S.D. Mean ± S.D. Mean ± S.D. Mean ± S.D.
GV9 24.40 ± 5.94 26.21 ± 7.73 29.42 ± 10.63 30.92 ± 12.99 0.003e
GV10 25.27 ± 5.47 26.75 ± 7.21 30.51 ± 8.62 33.58 ± 12.14 <0.001e
GV11 25.23 ± 5.02 26.38 ± 6.94 30.47 ± 8.26 33.40 ± 11.82 <0.001e
GV12 26.91 ± 5.80 28.54 ± 6.89 32.23 ± 9.25 36.78 ± 17.38 <0.001e
GV13 30.62 ± 7.26 31.61 ± 8.36 34.86 ± 9.39 38.70 ± 14.71 <0.001e
GV14 30.26 ± 9.19 31.84 ± 9.39 33.86 ± 13.01 38.80 ± 14.75 0.002e
BL11 30.25 ± 8.39 30.90 ± 8.96 33.94 ± 11.20 37.66 ± 15.18 0.003e
BL12 32.78 ± 9.13 33.86 ± 8.52 33.92 ± 8.54 38.57 ± 11.70 0.037e
BL13 26.09 ± 4.78 27.06 ± 4.89 28.94 ± 7.44 33.22 ± 12.10 <0.001e
BL14 22.72 ± 5.91 23.33 ± 6.60 26.68 ± 8.13 29.00 ± 11.85 <0.001e
BL15 22.62 ± 3.81 24.57 ± 5.35 26.70 ± 6.67 29.78 ± 9.61 <0.001e
BL16 21.98 ± 5.31 22.37 ± 6.17 26.30 ± 6.86 28.62 ± 10.07 <0.001e
BL17 23.21 ± 4.98 24.20 ± 6.00 26.35 ± 6.94 29.03 ± 9.72 <0.001e
BL41 27.33 ± 5.67 29.16 ± 7.41 32.41 ± 10.18 35.88 ± 14.86 <0.001e
BL42 25.42 ± 6.23 26.60 ± 6.51 30.06 ± 6.90 32.92 ± 13.70 <0.001e
BL43 21.98 ± 4.87 22.90 ± 5.56 27.11 ± 6.64 30.25 ± 13.17 <0.001e
BL44 17.59 ± 4.86 18.99 ± 6.29 23.29 ± 7.90 25.85 ± 12.07 <0.001e
BL45 15.98 ± 4.77 17.42 ± 5.63 21.73 ± 6.97 22.89 ± 11.49 <0.001e
BL46 16.15 ± 4.54 16.94 ± 5.00 19.67 ± 6.69 22.71 ± 11.53 <0.001e
SI14 32.40 ± 9.29 33.88 ± 9.94 39.87 ± 12.20 42.61 ± 18.58 <0.001e
SI15 35.25 ± 9.01 36.41 ± 10.49 39.54 ± 11.60 45.26 ± 18.02 <0.001e
GB21 26.43 ± 8.52 26.67 ± 8.11 31.23 ± 11.01 31.41 ± 12.84 0.012e
SP21 19.36 ± 4.86 18.76 ± 4.03 20.40 ± 4.55 20.68 ± 5.50 0.086
  1. Unit of mean ± SD: mm
  2. aUnderweight: patients with BMI below the fifth percentile
  3. bHealthy weight: patients with BMI from the 5th percentile up to the 85th percentile
  4. cOverweight: patients with BMI from the 85th percentile up to the 95th percentile
  5. dObese: patients with BMI at or above the 95th percentile
  6. eStatistically significant