Table 1.

Prevalence and Prevalence Estimates of UHL and MBHL^a

Investigation: Lower Estimate, Upper Estimate	Population Screened	Age Screened, y	Prevalence Range, per 1000
Bess et al22; Niskar et al38	UHL	School age (data from literature)	30.0–56.0
Dalzell et al27; White et al29	UHL	Newborn (data from literature)	0.8–2.7
	UHL	Newborn (data reported by states)	0.35b
Bess et al22; Niskar et al38	MBHL	School age (data from literature)	10.0–15.0
Watkin and Baldwin28	MBHL	Newborn (data from literature)	0.36
	MBHL	Newborn (data reported by states)	0.16b

^a.MBHL, mild bilateral hearing loss; UHL, unilateral hearing loss.

^b.Based on 2004 Directors of Speech and Hearing Programs in State Health and Welfare Agencies data.