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Table 4 Frequency and difference (X2) of the responses indicated by oralmaxillofacial surgeons (OMFS) and orthodontists (ORTHO) when evaluating impacted lower third molars (n=24) after analysis of one (XR1) or two serial radiographs (XR1+2)

From: The prediction of impacted versus spontaneously erupted mandibular third molars

  OMFS ORTO
  XR1 XR1+2 XR1 XR1+2
Correct 325 (50.1%) 465 (71.8%) 318 (49.1%) 387 (59.8%)
Error 323 (49.9%) 183 (28.2%) 330 (50.9%) 261 (40.2%)
Total 648 (100%) 648 (100%) 648 (100%) 648 (100%)
Kappa 0.219 (p<0.0001) 0.088 (p=0.0007)
X2XR1 OMFS vs ORTHO 0.738
X2 XR1+2 OMFS vs ORTHO <0.0001