Table 4.

Correlations among the modified Mallampati index and polysomnography parameters.

Variable	MLPT	n	Mean	Standard deviation	Minimum	Maximum	Percentile 25	Median	Percentile 75	Sig. (p)
	I	4	7.15	0.49	6.60	7.70	6.68	7.15	7.63
	II	24	39.42	32.14	5.40	94.60	12.20	24.70	53.00
AHI	III	37	38.38	30.36	5.10	108.90	15.22	28.50	60.20	0.024
	IV	17	33.19	20.13	8.57	76.10	15.90	24.40	49.40
	Total	82	36.08	28.84	5.10	108.90	12.20	24.40	52.75
	I	4	94.25	0.96	93.00	95.00	93.25	94.50	95.00
	II	24	91.75	2.27	87.00	95.00	90.00	92.00	93.00	0.007
SMED	III	37	93.56	1.79	88.30	98.00	92.30	94.00	94.75
	IV	17	92.33	2.65	89.00	98.00	89.95	92.00	94.30
	Total	82	92.81	2.25	87.00	98.00	92.00	93.00	94.30
	I	4	88.50	3.11	85.00	92.00	85.50	88.50	91.50
	II	23	78.35	9.10	59.00	90.00	70.00	82.00	85.00
SMIN	III	33	82.61	7.42	53.00	93.00	81.00	83.00	87.50	0.007
	IV	17	77.18	8.95	57.00	94.00	72.00	78.00	83.00
	Total	77	80.44	8.58	53.00	94.00	75.50	82.00	86.00

MLPT= modified Mallampati index; AHI= apnea hypopnea index; SMED= mean oxygen saturation; SMIN= minimum oxygen saturation.