Table 4.

Receiver operating characteristic curve analysis for the combination and each morphological parameter with respect to each grade of MGD severity

	DI			TI		GA (%)		DI-TI-GA
	AUC		P	AUC	P	AUC	P	AUC	P
Severities
Grade 1		0.76*	<0.001	0.57	0.19	0.52	0.73	0.79*	0.03
Grade 2		0.74*	<0.001	0.60*	0.04	0.67*	0.001	0.80*	0.01
Grade 3		0.67*	0.003	0.70*	0.001	0.83*	<0.001	0.87*	0.004
Grade 4		0.68	0.08	0.77*	<0.001	0.92*	<0.001	0.94*	0.003
Grade 5		0.68	0.08	0.90*	<0.001	1.00*	<0.001	1.00*	0.03

*: P value <0.05.

Abbreviations: MGD: meibomian gland dysfunction; DI: diameter deformation index; TI: tortuosity index; GA: gland area ratio.