Table 2.

Apnea–hypopnea indexes (IAH) and time of sleep with oxygen saturation inferior to 90%.

Patients	IAH			T sat < 90%
	1st	2nd	3rd	1st	2nd	3rd
1	10.9	12.3	12.3	2.7	12.5	12.5
2	11.2	1.3	39.3	2	0	7
3	0.3	0	0.4	10	20	32
4	48.1	54.5	60.6	100	91	94
5	9.3	14	10.6	3.4	7	2
6	17.6	15.4	14.1	2.3	0.2	0

Friedman's test.

IAH, χ² calc = 1.826; N.S., p = 0.401.

Time of sleep with oxygen sat <90%, χ² calc = 0.087; N.S., p = 0.957.