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Table 2 Frequency and difference of the responses indicated by oralmaxillofacial surgeons (OMFS) and orthodontists (ORTHO) when evaluating all lower third molars, erupted spontaneously or impacted (n = 68), after analysis of one (XR1) or two serial radiographs (XR1 + 2)

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

  OMFS ORTHO
XR1 XR1
XR1+2 Correct Error Total Correct Error Total
Correct 743 (40.5%) 254 (13.8%) 997 (54.3%) 797 (43.4%) 309 (16.8%) 1106 (60.2%)
Error 327 (17.8%) 512 (27.9%) 839 (45.7%) 303 (16.5%) 427 (23.3%) 730 (39.8%)
Total 1070 (58.3%) 766 (41.7%) 1836 (100%) 1100 (59.9%) 736 (40.1%) 1836 (100%)
Kappa 0.35 (p-valor <0.01) 0.30 (p-valor <0.01)
X2 XR1 OMFS vs Ortho <0.0001 <0.01
X2 XR1+2 OMFS vs Ortho <0.0001 <0.0001