Table 6.

Assessment of agreement of the intraoperative bacterium isolated with preoperative sample and those at recurrence.

Parameters	Agreement	Expected agreement	Kappa score	Probability
Agreement between preoperative sinus culture and intraoperative bone culture	59.85%	15.25%	0.526	<0.001a
Agreement between organism(s) isolated at index surgery and at recurrence	23.81%	9.81%	0.155	<0.001a

^aStatistically significant.