QUOTE(BoF @ Mar 10 2008, 12:36 PM)

This is from the link
you provided.
QUOTE
If congenital hearing loss is not recognized and managed, a child's speech, language, and cognitive development are often severely delayed.
<snip>
Despite these concerns, the consensus of multiple organizations that develop children's health guidelines is that the potential benefits of universal newborn hearing screening outweigh its adverse effects.7 Currently, 37 states and the District of Columbia have enacted legislation requiring that hearing screening be performed on all newborns in hospitals and birthing centers (Table 3).24 Additional resources for physicians and patients are provided in Table 4.
http://www.aafp.org/afp/20070501/1349.htmlI find this unconvincing for testing of the general population.
The original study was done in Atlanta. It found that approximately 1 in 1000 children aged 3 to 10 have hearing loss. Of these, 50% had severe conditions other than hearing loss or low birth weight.
Original StudyQUOTE
In addition, 50 (29%) of the 173 children had at least one other developmental disability (i.e., mental retardation, cerebral palsy, or vision impairment) and 17 (10%) had been very low birthweight (less than 3 lbs, 5 oz {less than 1500 g}) infants.
So we are talking about 1 in 2,000 children hear that don't have other outward signs that something is wrong. Plus, if the problem with hearing loss is delayed development, I would think that vision impairment, mental retardation or cerebral palsy may be larger hurdles to development and may have skewed the results. I'm not sure how much "early treatment" of hearing loss would help these conditions.
The other weird thing is that those with these "other" conditions, who were screened as infants, did not have an earlier detection date than the general population. This indicates that early testing has no public health benefit at all (although it obviously costs money). That alone should be enough to second guess the decision to screen all children.
Another argument against this is that the acceptable false positive range is 3%.
Detection and Intervention This was footnote 3 from BoF's linked article, the one that they used to justify the importance of early detection (under six months). So in order to catch 1 in 1000 (may be as high as 3 in 1000) hearing problems, we will accept a false positive rate of 30 in 1000.
QUOTE
The methodology used in screening should have a false-positive rate, ie, the proportion of infants without hearing loss who are labeled incorrectly by the screening process as having significant hearing loss, of 3%. The referral rate for formal audiologic testing after screening should not exceed 4%
So we know that the actual rate is less than 1/2 of 1%, but we will refer up to 4% for followup testing. All because this is more cost effective than later treatment?
Now why would the medical community come up with such guidelines? Well, they hint at it in their report:
QUOTE
It is anticipated that there will be increased demand for qualified personnel to provide age-appropriate identification and intervention services for young infants with significant hearing loss. As a result, there will be a need for the training and education of additional expert care providers.
And we wonder why the costs of medical insurance are rising? We are screening for a condition that affects maybe 1 in 2000 "normal" children (not low birth weight and do not have known contributing factors such as vision loss, cerebral palsy or mental retardation), we are following up with a number that is perhaps 10 times are high as the kids who are actually affected by actual hearing loss and of course we want the costs to be zero.
I find it interesting that although the original link says this one supports the assertion that early intervention helps, this study does not elaborate on why having "necessary intervention initiated by 6 months of age" helps. It does link to a study that claims early intervention helps.
Study. Of course, the study was performed on less than 24 individuals, only 5 of which had early intervention (i.e. hearing aids).