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Table 8 Correlation analysis of RID change with respect to Pederson’s difficulty index (DI)

From: Spontaneous bone regeneration after surgical extraction of a horizontally impacted mandibular third molar: a retrospective panoramic radiograph analysis

Assessments Spearman’s rho
Correlations coefficient Sig. (two-tailed)
RID6W_RID0 0.222 0.206
RID6M_RID6W 0.108 0.541
RID6M_RID0 0.395# 0.021
  1. Abbreviations: RID6W_RID0, difference between the radiographic infrabony defect recorded at 6 months and at baseline, RID6M_RID6W difference between the radiographic infrabony defect recorded at 6 months and at 6 weeks, RID6M_RID0 difference between the radiographic infrabony defect recorded at 6 months and at baseline
  2. #Correlation is significant at the 0.05 Position (2-tailed)
  3. #Note that the difference between RID value is in its absolute value for the statistical analysis