Table 1.

Number of patients and antropometric measurements of each study

Author	Number of patients	Non obese (BMI <30) patients				Obese (BMI ≥ 30) patients
		n	Age (year)	BMI	AHI	n	Age (year)	BMI	AHI	Age		BMI		AHI
			Mean ± SD				Mean ± SD			t	P	t	P	t	P
Pae et al. 1999	17	9	54.44 ± 10.47	24.69 ± 1.86	48.45 ± 8.48	8	40.63 ± 12.61	39.34 ± 5.55	84.84 ± 31.44	2.467	0.026	7.486	0.000	3.350	0.004
Paoli et al. 2000	85	39	56 ± 11	26 ± 2	46 ± 23	46	54 ± 10	35 ± 5	50 ± 23	N.S.		10.541	0.000	N.S.
Tangugsorn et al. 2000	100	43	48.3 ± 11.8	26.5 ± 2.7	32.2 ± 17.7	57	48.5 ± 11.7	34.3 ± 3.6	48.4 ± 28.8	N.S.		11.900	0.000	3.252	0.002
Sforza et al 2000	57	27	52.5 ± 9.8	-	62.1 ± 22.7	30	51.5 ± 8.3	-	82.2 ± 35.9	N.S.		-		2.494	0.016
Iked et al 2001	108	40	55 ± 11	24 ± 1.5	42 ± 24	68	54 ± 10	34.5 ± 4.7	46.6 ± 23.3	N.S.		13.703	0.000	N.S.