TABLE 1

Baseline and second-night polygraphy variables in control and intervention groups

	Control group (n=10)			Intervention group (n=10)
	Baseline	Second night	p-value	Baseline	Second night	p-value
Recording time min	444±11	450±12	0.5	434±14	434±14	0.95
Median	435	443		429	431
Interquartile range	414–461	416–483		414–461	411–469
Apnoea–hypopnoea index events per h	57.8±5.5	52.4±7.2	0.4	56.6±8.1	52.0±8.4	0.39
Median	58.6	49.8		58.7	50.4
Interquartile range	42.0–72.5	39.3–61.3		42.0–71.5	43.7–63.9
Apnoea–hypopnoea time %	40.0±5.8	36.6±5.3	0.24	33.1±5.5	30.9±5.3	0.57
Median	36.9	36.4		24.4	28.2
Interquartile range	26.1–55.2	26.5–48.3		20.5–41.9	25.1–40.6
Apnoea index events per h	31.2±7.2	27.0±6.3	0.44	27.1±8.5	29.5±8.5	0.44
Median	30.3	29.6		13.4	24
Interquartile range	10.4–50.4	8.4–40.6		10.8–37.5	14.8–37.3
Hypopnoea index events per h	26.6±4.5	25.4±4.6	0.57	29.5±4.0	22.5±4.1	0.11
Median	25.2	21.3		27.2	22.1
Interquartile range	15.1–33.9	14.5–339.9		24.2–39.6	11.6–33.0
O₂ desaturation index	56.8±5.4	51.4±6.6	0.44	55.0±7.9	51.4±7.8	0.44
Median	59.0	47.0		42.5	51.7
Interquartile range	40.5–70.8	40.5–61.1		35.7–73.9	40.2–61.5
Mean S_aO₂ %	91.0±0.9	91.8±0.8	0.24	92.6±0.6	92.9±0.4	0.57
Median	91.4	91.8		92.9	93.3
Interquartile range	91.1–92.6	90.3–93.2		92.0–93.9	92.4–93.7
S_aO₂ <90% time %	27.0±8.1	20.6±5.4	0.24	14.4±5.4	10.5±3.6	0.47
Median	19.7	16.0		6.7	9.7
Interquartile range	8.7–36.8	6.5–35.5		4.1–16.3	5.2–10.4
Snoring time %	24.9±7.0	25.1±6.6	0.54	36.5±6.9	28.8±7.1	0.44
Median	18.9	23.2		43.2	23.5
Interquartile range	5.3–45.8	7.0–38.4		17.4–49.1	11.5–38.4
Mean nocturnal HR bpm	72.3±1.7	68.4±2.0	0.07	73.3 ±4.5	73.0±4.2	0.64
Median	72.0	69.0		73.0	73.5
Interquartile range	67.8–73.8	63.0–71.5		63.8–83.0	64.5–82.8

Data are presented as mean±se unless otherwise stated. S_aO₂: arterial oxyhaemoglobin saturation; HR: heart rate; bpm: beats per min; time in %: proportion of recording time. A p-value <0.002 was considered statistically significant.