Table 2.

Unadjusted logistic regression analyses of predictors of OSA (AHI ≥5)

Predictor	Analysesa										Interactionf
	Males					Females
	β	χ2	P-values	Odds ratio (95% CI)	R2	β	χ2	P-values	Odds ratio (95% CI)	R2
Age ≥45 (years)	1.21	7,614.8	P<0.001	3.35 (3.26–3.44)	0.08	1.61	1,257.4	P<0.001	5.00 (4.86–5.14)	0.15	P<0.001
Obeseb	0.88	4,173.7	P<0.001	2.41 (2.34–2.47)	0.05	0.55	4,173.7	P<0.001	1.73 (1.68–1.77)	0.02	P<0.001
Neck circumference (in)	0.36	4,616.0	P<0.001	1.43 (1.42–1.45)	0.06	0.26	3,592.0	P<0.001	1.29 (1.28–1.30)	0.05	P<0.001
Sleepinessc	0.22	264.1	P<0.001	1.25 (1.22–1.29)	0.00	–0.31	5.8	P=0.02	0.97 (0.95–0.99)	0.00	P<0.001
Snoringd	0.56	1,691.5	P<0.001	1.74 (1.69–1.79)	0.02	0.54	1,813.1	P<0.001	1.72 (1.68–1.76)	0.02	P=0.46
Wake chokingd	0.55	593.0	P<0.001	1.74 (1.66–1.82)	0.01	0.35	304.8	P<0.001	1.42 (1.36–1.47)	0.00	P<0.001
Witnessed apneasd	0.76	1,726.0	P<0.001	2.14 (2.07–2.22)	0.02	0.56	833.2	P<0.001	1.74 (1.68–1.81)	0.01	P<0.001
Medical conditionse
Hypertension	0.84	3,469.0	P<0.001	2.31 (2.25–2.38)	0.04	0.98	5,378.4	P<0.001	2.66 (2.60–2.74)	0.07	P<0.001
Diabetes	0.78	1,221.0	P<0.001	2.19 (2.09–2.29)	0.02	0.74	1,586.0	P<0.001	2.09 (2.01–2.16)	0.02	P=0.10
Heart disease	0.74	973.7	P<0.001	2.10 (2.01–2.20)	0.01	0.79	1,168.3	P<0.001	2.21 (2.11–2.31)	0.02	P=0.12
Stroke	0.57	156.8	P<0.001	1.77 (1.62–1.93)	0.00	0.57	240.0	P<0.001	1.77 (1.65–1.91)	0.00	P=0.96
Depression	–0.10	31.3	P<0.001	0.91 (0.88–0.94)	0.00	–0.27	4.1	P=0.04	0.97 (0.95–1.00)	0.00	P=0.001
Insomnia	–0.08	19.6	P<0.001	0.92 (0.89–0.96)	0.00			P=0.07			P<0.001
Sleep medication	–0.23	150.4	P<0.001	0.80 (0.77–0.83)	0.00	–0.12	63.1	P<0.001	0.89 (0.86–0.91)	0.00	P<0.001

Notes:

^aAnalyses represent unadjusted logistic regression of each predictor for each sex separately;

^bbody mass index ≥30 kg/m²;

^cEpworth Sleepiness Scale ≥10;

^d% answer “at least frequently (3–4 times per week)” to “on average in the past month, how often have you snored or been told that you snore […] do you wake up choking or gasping […] have you ever been told that you stop breathing in your sleep or wake up choking or gasping?”;

^e% endorsed yes to “have you been diagnosed or treated for any of the following conditions?”;

^finteraction = sex × predictor.

Abbreviations: AHI, apnea hypopnea index; CI, confidence interval; OSA, obstructive sleep apnea.