Sleep Science and Practice

Table 3 Relationship between polysomnography parameters and questionnaire scores

From: Clinical application of headache impact test (HIT)-6 and epworth sleepiness scale (ESS) for sleep apnea headache

	With headache					Without headache
		HIT-6		ESS		ESS
	Median	R	p	R	p	Median	R	p
SE, %	83.4	-0.314	0.19	0.191	0.43	83.1	0.169	0.17
SL, min	10.0	0.229	0.35	-0.190	0.44	4.5	-0.079	0.52
Stage REM, %	12.7	0	1	0.109	0.66	14.5	0.010	0.94
Stage N1, %	22.2	0.163	0.50	0.036	0.89	29.4	-0.078	0.53
Stage N2, %	47.8	0.725	0.48	0.002	0.99	48.5	0.219	0.08
Stage N3, %	3.2	-0.514	0.02	-0.035	0.89	1.2	-0.170	0.17
AHI, events/h	32.5	0.100	0.68	0.124	0.61	45.3	-0.03	0.98
AROI, events/h	32.5	-0.086	0.73	-0.061	0.80	38.9	-0.075	0.55
PLMI, events/h	0	-0.041	0.87	0.013	0.96	0	-0.108	0.386
Lowest SpO₂, %	81.0	-0.228	0.35	-0.339	0.16	78.0	-0.220	0.074

SE Sleep effect, SL Sleep latency, AHI Apnea–hypopnea index, AROI Arousal index, PLMI Periodic limb movement index, R Pearson’s correlation coefficient

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ISSN: 2398-2683

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