Table 1.

Demographic and Clinical Features of Children Enrolled in the Study of Immunologic Response to Routine Vaccine Schedule

FeaturesPreterm (n = 16)Term (n = 17)
Mean age at study in months (range)45  (39–50)45  (36–58)
Mean birth weight in grams (range)835  (660–990)3085  (2270–3690)
Mean gestational age at birth in weeks (range)25.9  (23.6–28.0)40  (39–42)
Number female (%)8  (50%)8  (47%)
Number nonwhite (%)7  (44%)15  (88%)*
Medicaid (%)5  (31%)17  (100%)*
Inhaled albuterol and/or cromolyn sodium (%)4  (25%)0*
Pneumonia/> four ear infections (%)12  (75%)1  (6%)*
  • * P < .05 for difference from preterm by Yates corrected χ2 or Fisher exact test.