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. 2018 Sep 13;9(1):51–56. doi: 10.1016/j.jobcr.2018.09.004

Table 4.

Intra-group and inter-group comparison of pre- and post-treatment angular measurements in each study group.

Angular Measurements (deg) Group 1 (n = 25) Extraction Group
Group 2 (n = 25) Non-Extraction Group
P-value (Inter-Group) [Group 1 vs Group 2]
Pre-treatment Post-treatment % Change P-value [Pre- vs Post] Pre-treatment Post-treatment % Change P-value [Pre-vs Post] Pre-treatment Post-treatment % Change
SNA 82.8 ± 2.9 82.8 ± 3.1 1.5 0.805 (NS) 82.5 ± 1.7 81.9 ± 1.3 1.4 0.040 (S) 0.600(NS) 0.237(NS) 0.592(NS)
SNB 80.6 ± 2.9 80.3 ± 2.8 1.0 0.164 (NS) 80.1 ± 1.6 79.7 ± 1.3 1.7 0.170 (NS) 0.402(NS) 0.342(NS) 0.210(NS)
ANB 2.6 ± 1.0 2.5 ± 0.7 3.8 0.714 (NS) 2.4 ± 0.6 2.3 ± 0.6 4.2 0.574 (NS) 0.418(NS) 0.275(NS) 0.146(NS)
UI x LI 106.7 ± 4.5 132.2 ± 3.5 24.1 0.001 (S) 117.0 ± 3.2 130.3 ± 2.2 13.1 0.001 (S) 0.001(S) 0.848(NS) 0.001(S)
UI x NA 33.1 ± 4.0 23.2 ± 2.1 28.6 0.001 (S) 27.7 ± 1.4 23.1 ± 1.0 16.5 0.001 (S) 0.001(S) 0.739(NS) 0.001(S)
LI x NB 32.8 ± 2.8 24.8 ± 1.5 24.1 0.001 (S) 27.8 ± 1.8 25.8 ± 0.5 11.3 0.001 (S) 0.001(S) 0.999(NS) 0.001(S)
IMPA 105.4 ± 2.3 94.6 ± 2.4 10.3 0.001 (S) 103.2 ± 1.9 95.9 ± 1.4 9.9 0.001 (S) 0.001(S) 0.006(S) 0.501(NS)
FMA 25.7 ± 2.5 27.6 ± 3.8 10.7 0.001 (S) 26.6 ± 1.7 28.2 ± 1.7 6.1 0.001 (S) 0.154(NS) 0.532(NS) 0.163(NS)
Saddle 126.3 ± 4.4 126.4 ± 4.6 0.5 0.574 (NS) 125.4 ± 5.2 125.8 ± 4.8 0.8 0.031 (S) 0.505(NS) 0.673(NS) 0.175(NS)
Articulare 141.5 ± 5.9 142.9 ± 5.4 1.4 0.003 (S) 142.8 ± 5.8 143.6 ± 5.6 0.8 0.001 (S) 0.429(NS) 0.647(NS) 0.324(NS)
Gonial 125.0 ± 4.4 126.7 ± 4.1 2.1 0.010 (S) 128.9 ± 3.7 129.6 ± 3.7 0.9 0.003 (S) 0.001(S) 0.011(S) 0.211(NS)
Total 392.8 ± 7.1 395.4 ± 7.1 0.9 0.003 (S) 397.1 ± 5.4 399.0 ± 4.8 0.5 0.001 (S) 0.020(S) 0.041(S) 0.118(NS)
Hyoid 14.2 ± 5.4 15.5 ± 4.4 27.7 0.035 (S) 17.7 ± 4.6 18.6 ± 3.6 14.1 0.090 (NS) 0.016(S) 0.010(S) 0.179(NS)

Values are Mean ± Standard Deviation. P-values by paired t-test after confirming the underlying normality assumption of difference in each measurement. P-value<0.05 is statistically significant. S, statistically Significant; NS, statistically Non-Significant.