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Table 2 Summary of pooled estimates performed with the random effects model and analysis of heterogeneity

From: Clinical effectiveness of chin cup treatment for the management of Class III malocclusion in pre-pubertal patients: a systematic review and meta-analysis

Variables Number of treated groups Kind of analysis performed, meta analysis (MA) or exploratory analysis (EA) Heterogeneity Test of nullZ(P-value) Standard difference in means 95% confidence intervals Significance (P-value)
I 2 Q(P-value) T 2
SNA (°) 7 MA 69.362% 19.584 (0.003) 0.338 −0.070 (0.944) −0.02 −0.54 to 0.50 0.944
SNB (°) 7 MA 90.800% 65.214 (0.000) 2.029 −3.429 (0.001)*** −1.97 −3.09 to −0.84 0.001***
ANB (°) 7 MA 89.614% 57.767 (0.000) 2.029 4.311 (0.000)*** 2.48 1.36 to 3.61 0.000***
Wits appraisal (mm) 5 MA 95.645% 91.844 (0.000) 6.364 3.083 (0.002)** 3.62 1.32 to 5.93 0.002**
Co-Gn (mm) 4 EA 11.164% 3.377 (0.337) 0.018 −1.483 (0.138) −0.29 −0.68 to 0.09 0.138
SN-ML (°) 5 MA 70.569% 13.591 (0.009) 0.437 3.321 (0.001)*** 1.17 0.48 to 1.86 0.001***
Gonial angle (°) 6 MA 78.915% 23.714 (0.000) 0.636 −2.164 (0.030)* −0.80 −1.52 to 0.08 0.030*
N-Me (mm) 3 EA 65.651% 5.823 (0.054) 0.321 3.428 (0.001)*** 1.39 0.59 to 2.18 0.001***
UFH (mm) 3 EA 9.200% 2.203 (0.332) 0.012 1.251 (0.211) 0.26 −0.15 to 0.68 0.211
LFAH (mm) 3 EA 0% 1.944 (0.378) 0 1.328 (0.184) 0.27 −0.13 to 0.66 0.184
Co-Go (mm) 3 EA 0% 0.369 (0.832) 0 −0.987 (0.324) −0.22 −0.66 to 0.22 0.324
Overjet (mm) 3 EA 84.912% 13.256 (0.001) 1.548 3.291 (0.001)*** 2.62 1.06 to 4.19 0.001***
Overbite (mm) 3 EA 20.552% 2.517 (0.284) 0.040 −0.943 (0.345) −0.24 −0.74 to 0.26 0.345
  1. *Statistically significant at P ≤ 0.05, **statistically significant at P ≤ 0.01, ***statistically significant at P ≤ 0.00.