It is recommended that if an etiologic
diagnosis is not readily apparent after a detailed history, examination and initial investigations, magnetic resonance imaging should be the standard clinical practice for a child with global developmental delay.
In the above 50 years age group, most common etiologic
factors are coronary artery disease 30%, followed by RHD (24%), hypertension (16.
The only study done in Pakistan on frequency of atypical pneumonia used a clinical approach for diagnosis in hospitalised children which is not reliable in terms of differentiating between etiologic
causes of pneumonia.
9,13,14) Nonspecific white matter changes not typical of known leukodystrophy marked as leukopathy as an etiologic
cause for GDD were higher compared to previous reports.
In addition, FDA specifies that the response to the etiologic
agent in the animal species exposed should be similar to the illness or injury experienced in humans.
Agrawal and his colleagues reported that, based on the etiologic
findings and antibiotic sensitivities, only 43% of the first-choice antibiotics were appropriate in the vaccine era.
In the hospital, the etiologic
organism is identified in only 15%-20% of pneumonia cases, and the most of those results come from blood culture, not sputum.
When recall of exposure differs for cases and controls, "recall bias", a form of information bias, presents a major threat for etiologic
case-control studies (13, 14).
Investigators look for ways in which etiologic
agents could have contaminated food, survived, and propagated.
An organism has now been isolated in yolk sacs of embryonated hens' eggs that appears to be the etiologic
Since the focus of the study was firearm related injuries, we chose those injured in motor vehicle crashes for comparisons because motor vehicle crashes are the leading cause of spinal cord injury; and this is the only etiologic
based group with a membership large enough and having adequately similar attributes to provide practical comparisons.
agents in both vehicles are the same and the regulations regarding both products must be the same as well.