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. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: J Pediatr. 2008 May 23;153(3):408–413. doi: 10.1016/j.jpeds.2008.03.035

Table I.

Demographic characteristics of study subjects

Variable* N %
Sex: Male 140 52.2
       Female 128 47.8
Age (yrs): 3 72 26.7
                4 120 44.3
                5 79 28.2
Race: Caucasian 150 55.1
         African American 86 31.6
         Biracial 31 11.4
         Latino/Hispanic 2 0.7
         Other 3 1.1
Income: $0–20,000 61 23.8
             $20 001–40 000 40 15.6
             $40 001–60 000 44 17.2
             $60 000 and above 103 40.2
Chronic Medical Conditions
            Repeated persistent ear infections 79 28.9
            Repeated persistent respiratory infections 71 26.0
            Asthma 63 23.1
            Bowel diseases 20 7.3
            Repeated persistent urinary infections 10 3.7
            Blood diseases 8 2.9
            Chronic/recurrent lung disease 4 1.5
            Eczema 2 0.7
            Birth Defect(s) 1 0.4
            Congenital heart disease 1 0.4
            Hepatitis A 1 0.4
            Other 6 2.2
*

Individuals could report more than one medical condition, making numbers in this table not always add up to those reported in the text or may differ based upon the analysis reported.