Association between physical activity and sleep-disordered breathing in male Japanese workers: a cross-sectional study

Table 2 Odds ratios (ORs) and 95% confidence intervals (CIs) of sleep-disordered breathing for three levels of physical activity among non-obese male Japanese workers

	Physical activity tertile (range) [MET-h/week]
	Low	Middle	High	P for trend
	(0–9.65)	(9.9–45.2)	(45.3–376.8)	P for trend
Cases (RDI ≥15), n	14	24	4
Controls (RDI <15), n	36	39	39
Crude OR (95% CI)	1 (reference)	1.58 (0.71, 3.52)	0.27 (0.08, 0.88)	0.007
Adjusted OR (95% CI)^a	1 (reference)	1.65 (0.71, 3.83)	0.41 (0.12, 1.45)	0.075
Adjusted OR (95% CI)^b	1 (reference)	1.98 (0.82, 4.79)	0.46 (0.13, 1.67)	0.098
Adjusted OR (95% CI)^c	1 (reference)	1.65 (0.63, 4.31)	0.41 (0.10, 1.61)	0.11

Italics indicates statistically significant values (P < 0.05)
Respiratory disturbance index (RDI), dichotomized as ≥15 or <15 episodes/h, was used as a dependent variable
^aAdjusted for age (continuous)
^bAdjusted for age (continuous) and body mass index (continuous)
^cAdjusted for age (continuous), body mass index (continuous), education (junior/technical college or lower, university or higher), marital status (cohabiting after marriage, all other values), history of hypertension (yes, no), current smoker (yes, no), regular drinker (yes, no), and night shift work (yes, no)

ISSN: 1756-0500