Table 2.

Nocturnal respiration and hypoxaemia

	No SDB (n = 7)	CSA (n = 9)	OSA (n = 8)	p value
Apnoea-hypopnoea index (episodes/h)	4 ± 2	32 ± 22	21 ± 7	0.004
cAHI/AHI (%)	51 ± 18	71 ± 12	22 ± 14	< 0.001*
AI/AHI (%)	32 ± 20	80 ± 12	42 ± 20	< 0.001*
Mean oxygen saturation (%)	92 ± 3	93 ± 2	94 ± 2	0.390
Minimal oxygen saturation (%)	86 ± 3	87 ± 4	85 ± 6	0.600

Data are expressed as mean ± standard deviation; or median [interquartile range]

SDB sleep-disordered breathing, CSA central sleep apnoea, OSA obstructive sleep apnoea, cAHI central apnoea-hypopnoea index, oAHI obstructive apnoea-hypopnoea index, SpO2 oxygen saturation

*OSA vs. CSA p < 0.001, significant p values (p < 0.05) marked in bold