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Table 3 Comparison of incisal and cervical accumulative moved distances (mm) between sides over time - group 2

From: The effects of corticotomy and piezocision in orthodontic canine retraction: a randomized controlled clinical trial

Source Incisal Cervical
Mean S.D. Exp (β) C. I. P value Mean S.D. Exp (β) C. I. P value
1 week Control 0.39 0.21 1.00 - - 0.19 0.15 1.00 - -
Piezo 0.30 0.17 0.74 [0.63; 0.86] 0.000* 0.17 0.12 0.83 [0.69; 1.00] 0.055
2 weeks Control 0.60 0.34 1.00 - - 0.21 0.12 1.00 - -
Piezo 0.46 0.28 0.74 [0.64; 0.85] 0.000* 0.22 0.13 0.82 [0.69; 0.98] 0.030*
4 weeks Control 1.13 0.66 1.00 - - 0.40 0.26 1.00 - -
Piezo 0.75 0.30 0.74 [0.64; 0.85] 0.000* 0.30 0.19 0.80 [0.68; 0.94] 0.006*
6 weeks Control 1.48 0.77 1.00 - - 0.54 0.31 1.00 - -
Piezo 1.10 0.54 0.74 [0.64; 0.85] 0.000* 0.39 0.25 0.78 [0.68; 0.90] 0.001*
8 weeks Control 1.84 0.90 1.00 - - 0.67 0.42 1.00 - -
Piezo 1.34 0.68 0.74 [0.65; 0.85] 0.000* 0.45 0.24 0.76 [0.67; 0.87] 0.000*
10 weeks Control 2.42 1.09 1.00 - - 0.98 0.50 1.00 - -
Piezo 1.81 0.89 0.74 [0.65; 0.85] 0.000* 0.71 0.31 0.74 [0.65; 0.84] 0.000*
12 weeks Control 2.58 1.12 1.00 - - 1.13 0.56 1.00 - -
Piezo 2.05 0.91 0.74 [0.65; 0.85] 0.000* 0.80 0.38 0.72 [0.63; 0.83] 0.000*
14 weeks Control 3.08 1.26 1.00 - - 1.43 0.61 1.00 - -
Piezo 2.46 1.13 0.75 [0.65; 0.85] 0.000* 1.01 0.51 0.70 [0.61; 0.81] 0.000*
16 weeks Control 3.48 1.23 1.00 - - 1.60 0.58 1.00 - -
Piezo 2.69 1.14 0.75 [0.65; 0.85] 0.000* 1.15 0.56 0.69 [0.59; 0.80] 0.000*
18 weeks Control 3.61 1.21 1.00 - - 1.74 0.83 1.00 - -
Piezo 2.81 1.33 0.75 [0.65; 0.86] 0.000* 1.21 0.58 0.67 [0.56; 0.80] 0.000*
20 weeks Control 3.71 1.33 1.00 - - 1.68 0.69 1.00 - -
Piezo 2.74 1.44 0.75 [0.65; 0.87] 0.000* 1.37 1.36 0.65 [0.54; 0.79] 0.000*
22 weeks Control 4.06 0.97 1.00 - - 2.16 0.75 1.00 - -
Piezo 2.92 1.16 0.75 [0.65; 0.87] 0.000* 1.30 0.63 0.64 [0.51; 0.79] 0.000*
24 weeks Control 4.05 0.96 1.00 - - 2.16 0.58 1.00 - -
Piezo 2.93 1.11 0.75 [0.64; 0.88] 0.000* 1.42 0.58 0.62 [0.49; 0.79] 0.000*
  1. p values were obtained by marginal log-linear regression. Level of significance = 5%; *, significant (p < 0.05); SD standard deviation, CI confidence interval (95%), Exp. exponential