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