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Table 5 Destrictive statistics and significance probabilities of cephalometric variables

From: Analysis of pretreatment factors associated with stability in early class III treatment

  Total (n = 75) Stable (n = 55) Unstable (n = 20) U test
x IQR x IQR x IQR p
PNS-ANS 0.96 0.08 0.95 0.08 0.97 0.09 .101
Ar-Me 1.04 0.06 1.03 0.07 1.05 0.07 .024*
SNA 79.70 4.90 79.50 4.90 80.45 3.63 .260
SNB 79.80 3.90 79.40 4.10 80.40 4.43 .065
ANB 0.00 2.90 0.20 2.90 -0.90 2.28 .081
Wits -6.60 3.40 -6.20 3.30 -7.70 2.75 .035*
SN-Ar 124.60 5.60 124.80 5.50 124.20 7.38 .573
SN-Rm 90.20 7.30 90.70 6.50 87.50 6.40 .049*
SN-Md 36.90 6.70 36.90 6.70 36.85 6.23 .480
Gonial angle 126.00 9.00 125.10 8.90 129.50 6.83 .024*
U1-PP 102.90 10.60 102.70 10.80 105.25 12.10 .253
IMPA 89.10 10.50 89.80 8.00 83.05 7.93 .009*
FMIA 60.90 9.50 59.30 9.60 65.05 9.43 .025*
  1. Statistical powers were from 0.822 to 0.840; Effect size d =0.8 (x median, IQR interquartile range, *: p < .05)