Table 2.

Sex- and Age-Adjusted Odds Ratios (OR) and 95% Confidence Intervals (CI) for Hearing Impairment (>25 dB Hearing Level [HL]) Comparisons of NHANES 2011–2012 Versus the Reference Population, NHANES 1999–2004, for Each Pure-Tone Frequency and for the Speech-Frequency and High-Frequency Pure-Tone Average (PTA) by Better and Worse Ear

			U.S. Adults, Aged 20–69 Years
Ear	Pure-Tone Frequency (ies)	Survey (Reference: NHANES 1999–2004)	OR	Lower 95% CI	Upper 95% CI	P-Value
BETTER	0.5 kHz	NHANES 2011–2012	0.63	0.41	0.96	.03
	1 kHz	NHANES 2011–2012	1.22	0.88	1.70	.23
	2 kHz	NHANES 2011–2012	0.79	0.60	1.05	.10
	3 kHz	NHANES 2011–2012	0.88	0.71	1.09	.23
	4 kHz	NHANES 2011–2012	0.72	0.60	0.88	.002
	6 kHz	NHANES 2011–2012	0.82	0.69	0.98	.03
	8 kHz	NHANES 2011–2012	1.04	0.80	1.37	.75
	PTA of 0.5, 1, 2, & 4 kHz	NHANES 2011–2012	0.75	0.56	1.00	.05
	PTA of 3, 4, & 6 kHz	NHANES 2011–2012	0.78	0.64	0.94	.01
WORSE	0.5 kHz	NHANES 2011–2012	0.62	0.50	0.76	<.001
	1 kHz	NHANES 2011–2012	0.94	0.76	1.17	.59
	2 kHz	NHANES 2011–2012	0.78	0.62	0.97	.02
	3 kHz	NHANES 2011–2012	0.85	0.71	1.01	.07
	4 kHz	NHANES 2011–2012	0.81	0.69	0.95	.01
	6 kHz	NHANES 2011–2012	0.84	0.71	0.98	.03
	8 kHz	NHANES 2011–2012	1.19	0.95	1.49	.14
	PTA of 0.5, 1, 2, & 4 kHz	NHANES 2011–2012	0.70	0.56	0.86	.001
	PTA of 3, 4, & 6 kHz	NHANES 2011–2012	0.75	0.65	0.88	.001