Skip to main content

Advertisement

Table 3 Descriptive statistics

From: Extraction decision and identification of treatment predictors in Class I malocclusions

   Non-extraction Extraction p valuea
Cephalometric variables
SNA Mean 81.76 81.26 0.184
SD 3.93 3.79
SNB Mean 78.54 77.11 0.000
SD 3.65 3.54
ANB Mean 3.16 4.08 0.000
SD 2.27 2.21
U1-SN Mean 104.12 103.23 0.215
SD 7.26 7.71
U1-NA (1) Mean 22.15 21.72 0.535
SD 7.00 7.62
NSGn Mean 67.13 68.88 0.000
SD 4.09 3.71
FMIA Mean 61.95 60.32 0.022
SD 7.55 6.71
IMPA Mean 92.38 92.58 0.763
SD 5.99 5.51
FMA Mean 25.60 27.05 0.011
SD 397 145
L1-NB (1) Mean 24.99 25.72 0.258
SD 6.59 6.66
U1-L1 Mean 129.48 128.30 0.257
SD 10.51 11.26
SN-PP Mean 7.09 7.25 0.631
SD 3.52 3.11
SN-OP Mean 16.27 17.72 0.001
SD 4.58 4.63
Z angle Mean 75.05 71.79 0.000
SD 7.04 6.39
PNS-A Mean 48.97 49.01 0.939
SD 4.48 5.26
U1-NA (2) Mean 3.97 4.18 0.479
SD 2.56 3.12
L1-NB (2) Mean 4.34 5.18 0.000
SD 2.39 2.59
L1-A Pg Mean 1.92 2.38 0.056
SD 2.44 2.63
Pg-NB Mean 1.43 0.94 0.007
SD 1.89 1.66
WITS Mean -0.15 0.58 0.023
SD 2.82 3.41
N-Me Mean 114.67 116.74 0.073
SD 10.15 12.41
N-ANS Mean 51.03 51.48 0.380
SD 5.12 5.74
ANS-Me Mean 65.84 67.46 0.030
SD 6.39 8.03
LL-E-plane Mean -1.72 -0.22 0.000
SD 3.12 2.90
S-Go Mean 72.93 72.31 0.449
SD 8.08 9.54
S-Ar Mean 33.98 33.54 0.297
SD 4.36 4.41
Model variables
Overbite Mean 3.14 3.53 0.033
SD 1.93 1.71
Overjet Mean 2.85 3.45 0.004
SD 1.94 2.21
Upper crowding Mean -1.16 -5.00 0.000
SD 3.79 3.79
Lower crowding Mean -1.98 -6.63 0.000
SD 3.17 3.60
Upper midline deviation Mean 0.06 0.32 0.034
SD 1.00 1.32
Lower midline Mean 0.00 -0.09 0.573
SD 1.19 1.60
Demographic variables
Age Mean 14.55 14.52 0.948
SD 5.36 4.86
  1. at test for independent samples.