Journal of Dental Hygiene Science

Table. 5.

Results of Interclass Correlation Coefficient and Weighted Kappa Reliability of Examiners 1 and 2

		PHPI	QHPI	RMNPI	NPI
Intraclass correlation coefficient	Anterior	0.89	0.45	0.90	0.95
	Posterior	0.73	0.62	0.78	0.90
	Total	0.89	0.49	0.86	0.93
Weighted kappa	Anterior	0.65	0.30	0.79	0.87
	Posterior	0.58	0.20	0.63	0.76
	Total	0.67	0.15	0.67	0.81

PHPI: Patient Hygiene Performance Index, QHPI: Quigley and Hein Plaque Index, RMNPI: Rustogi’s Modified Navy Plaque Index, NPI: Novel Plaque Index.