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Table 2 Paired t test for comparing the dental and skeletal changes after class II elastics phase for the conventional group

From: The efficiency of mandibular mini-implants in reducing adverse effects of class II elastics in adolescent female patients: a single blinded, randomized controlled trial

Variable     Paired differences t P value  
  Mean SD Mean SD SEM
SNA Pre 82.08 2.97 − 0.33 2.23 0.64 − 0.52 0.61474 P > 0.05 NS
Post 81.75 3.19
SNB Pre 76.25 3.22 0.17 2.79 0.81 0.21 0.83988 P > 0.05 NS
Post 76.42 3.68
ANB Pre 5.83 1.11 − 0.50 1.57 0.45 − 1.11 0.29252 P > 0.05 NS
Post 5.33 1.72
MMP Pre 28.08 3.45 0.42 2.02 0.58 0.71 0.48993 P > 0.05 NS
Post 28.50 3.18
MP/SN Pre 36.08 4.58 1.38 2.23 0.64 2.14 0.05573 P ≈ 0.05 Almost S
Post 37.46 5.27
Y axis angle Pre 57.20 3.70 2.30 4.67 1.35 5.62 0.00015 P < 0.001 HS
Post 59.50 3.75
Lower facial height Pre 63.70 5.47 2.30 4.91 1.42 3.36 0.00637 P < 0.01 HS
Post 66.00 4.47
Effective maxillary length Pre 83.17 4.20 0.75 5.28 1.52 0.49 0.63212 P > 0.05 NS
Post 83.92 4.68
Effective mandibular length Pre 108.50 5.52 2.00 8.34 2.41 0.83 0.42406 P > 0.05 NS
Post 110.50 6.08
SN/occlusal plane Pre 16.66 3.44 4.30 2.65 0.77 5.62 0.00016 P < 0.001 HS
Post 20.96 3.69
U1 vertical position Pre 20.92 3.17 1.67 3.39 0.98 1.70 0.11628 P > 0.05 NS
Post 22.58 2.81
U1 AP position Pre 7.30 3.06 − 0.30 3.82 1.10 − 0.27 0.79047 P > 0.05 NS
Post 7.00 1.76
U1 inclination Pre 113.00 4.13 − 3.33 1.61 0.47 3.33 0.00002 P < 0.001 HS
Post 109.67 4.42
U6 AP position Pre 42.17 2.92 − 2.04 5.91 1.71 2.04 0.25659 P > 0.05 NS
Post 40.13 4.89
U6 vertical position Pre 16.33 2.53 0.08 2.16 0.62 0.13 0.89619 P > 0.05 NS
Post 16.42 1.94
L1 inclination Pre 100.00 6.09 5.42 2.81 0.81 6.68 0.00003 P < 0.001 HS
Post 105.42 5.12
L1 AP position Pre 5.08 1.62 1.33 1.44 0.41 3.22 0.00819 P < 0.01 HS
Post 6.42 1.62
L1 vertical position Pre 30.75 4.77 2.42 4.70 1.36 1.78 0.10243 P > 0.05 NS
Post 33.17 3.93
L6 vertical Pre 23.54 2.68 1.21 0.99 0.29 − 1.21 0.00139 P < 0.001 HS
Post 24.75 2.83
L6 AP position Pre 42.08 3.23 0.92 6.35 1.83 0.50 0.62664 P > 0.05 NS
Post 43.00 5.77