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Table 3 Mean values with standard deviations and 95% confidence intervals (CI) of variables at T0 and T1 achieved with the extrusion arch mechanics with mean differences (T1–T0)a

From: A prospective clinical trial of the effects produced by the extrusion arch in the treatment of anterior open bite

Variable T0 (initial) T1 (Final) T1–T0 CI (95%)  
  Mean SD Mean SD Mean SD UB LB P value
Interincisal angle (°) 115.58 7.04 121.15 10.57 5.57 6.59 1.77 9.38 .010*
 U1.PP (°) 115.73 4.40 109.58 5.96 − 6.15 6.42 − 9.85 − 2.44 .003*
 U1-PP (mm) 25.45 3.38 27.39 2.77 1.94 1.71 0.96 2.93 .001*
U1 tip-U6D (mm) 40.82 2.56 38.61 3.65 − 2.21 2.34 − 3.57 − 0.84 .004*
 U6-PP (mm) 17.86 1.94 16.85 2.38 − 1.01 3.22 − 2.86 0.85 .260
U6.PP (°) 86.56 10.47 75.07 7.26 − 11.49 8.41 6.63 16.34 < .0001*
  1. aLB indicates lower bound, UB upper bound, SD indicates standard deviation, U1 maxillary central incisor, U6 maxillary first molar, U6D distal aspect of maxillary first molar
  2. *P < .05
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