Sleep-related breathing disorders and gait variability: a cross-sectional preliminary study

Table 2 Multivariate logistic regressions showing the association between the highest tertile (i.e., worst performance) of coefficient of variation of stride time (dependent variable) and the apnea-hypopnea index categorized into 3 levels of severity of sleep-related breathing disorders (ie, no disorder; mild disorder; moderate-to-severe disorder; independent variable) (n = 49)

	Highest tertile of stride time variability
	Model 1^†			Model 2^‡
	OR	95% CI	P-value	OR	95% CI	P-value
Apnea-hypopnea index:
< 15	0.21	[0.05;0.74]	0.021	1.00 (Ref*)
15-30	1.70	[0.51;5.72]	0.388	4.98	[0.98;32.31]	0.065
>30	6.25	[1.17;48.04]	0.042	16.98	[1.74;268.42]	0.024
BMI ≥ 25 kg/m²	0.86	[0.26;2.92]	0.802	0.13	[0.01;0.76]	0.039
Digit span score	0.72	[0.48;1.02]	0.077	0.71	[0.45;1.06]	0.108

CI = confidence interval; BMI = body mass index; OR: odds ratio; *Apnea-hypopnea index <15 used as reference level; ^†Separated model for Apnea-hypopnea index, body mass index and digit span score; ^‡Full adjusted model.
P significant (<0.05) indicated in bold.

ISSN: 1471-2466