Table 5.

Risk of periodic limb movements during sleep according to positional obstructive sleep apnea status

OSA severity	POSA		Non-POSA		OR (95% CI)a)	P-value
	Total	PLMS	Total	PLMS
Total	3,565	392 (11.0)	1,513	80 (5.3)	1.389 (1.049–1.839)	0.022
Mild	759	92 (12.1)	124	18 (14.5)	0.559 (0.303–1.030)	0.062
Moderate	1,018	124 (12.2)	191	15 (7.9)	1.822 (0.995–3.339)	0.052
Severe	1,788	176 (9.8)	1,198	47 (3.9)	1.554 (1.065–2.267)	0.022

Values are presented as number (%) unless otherwise indicated.

OSA, obstructive sleep apnea; POSA, positional obstructive sleep apnea; PLMS, periodic limb movements during sleep; OR, odds ratio; CI, confidence interval.

^a)Odds ratios were adjusted for sex, age, body mass index, and apnea–hypopnea index.