Table 3.

Data downloaded from CPAP devices

	CPAP pre-S9 (n = 50)	S9 (n = 50)	CPAP post-S9 (n = 44)
95%ile mask leak (L/min)a	17.82 ± 11.50	16.39 ± 11.04	15.91 ± 10.28
95%ile pressure (cm H2O)a	11.25 ± 1.66	11.40 ± 2.00	11.11 ± 1.63
Apnea hypopnea indexb	4.90 ± 3.14	1.54 ± 1.60	4.47 ± 3.29

^aIn comparisons across all groups p = ns

^bThe S9 uses a revised AHI scoring method; therefore, direct comparison of AHI between S9 and patient's usual device is not valid