Reliability of two difficulty indexes in predicting the surgical extraction difficulty of impacted mandibular third molars | Journal of Oral Medicine and Oral Surgery

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Table IV

The accuracy of difficulty indexes/operative difficulty.

Difficulty index/operative difficulty by duration	Number of cases (%)		P value
Difficulty index/operative difficulty by duration			P value
	Accurate	Inaccurate
Pernambuco	46 (55.4%)	37 (44.6%)	0.0192 [S]*
Pederson	30 (36.1%)	53 (63.9%)	0.0192 [S]*
Difficulty index/operative difficulty by technique
Pernambuco	31 (37.3%)	52 (62.7%)	0.0406 [S]*
Pederson	18 (21.7%)	65 (78.3%)	0.0406 [S]*

*Fisher's exact test, [S] Significant.

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