TABLE 1

Distribution of Samples According to Demographic Characteristics

Demographic Characteristic2002–2003 Influenza Seasona2003–2004 Influenza Seasonb
Unweighted nWeighted % (±95% CI Half-width)Unweighted nWeighted % (±95% CI Half-width)
Overall13831100.013881100.0
Child's race/ethnicity
    Hispanic295826.8 (±1.2)287727.9 (±1.4)
    White, non-Hispanic814353.5 (±1.3)838752.4 (±1.5)
    Black, non-Hispanic191313.9 (±1.0)178014.0 (±1.1)
    Asian, non-Hispanic6164.8 (±0.7)6464.6 (±0.6)
    American Indian/Alaska Native and other, non-Hispanic2011.1 (±0.2)1911.1 (±0.3)
First born
    No835161.5 (±1.3)843563.1 (±1.4)
    Yes548038.5 (±1.3)544636.9 (±1.4)
Gender
    Male705450.8 (±1.4)708351.0 (±1.5)
    Female677749.2 (±1.4)679849.0 (±1.5)
Poverty statusc
    Above, more than $75 000/y288515.0 (±0.8)330916.3 (±0.9)
    Above, $75 000/y or less693246.7 (±1.4)673545.1 (±1.5)
    Below274324.5 (±1.3)261126.3 (±1.5)
    Unknown127113.8 (±1.1)122612.3 (±1.1)
Child's age at start of the influenza season
    6–11 mo404129.2 (±1.3)381627.0 (±1.4)
    12–16 mo612444.1 (±1.4)633546.1 (±1.5)
    17–20 mo366626.7 (±1.2)373026.9 (±1.3)
Mother's education level
    <12 y195323.0 (±1.3)170322.3 (±1.5)
    12 y357430.6 (±1.3)349031.0 (±1.4)
    >12 y, noncollege graduate263621.4 (±1.1)263421.4 (±1.2)
    College graduate566825.0 (±1.0)605425.3 (±1.1)
Mother's marital status
    Widowed/divorced/separated9788.4 (±0.8)8538.4 (±0.9)
    Never married275823.1 (±1.2)258223.2 (±1.3)
    Married1009568.6 (±1.3)1044668.5 (±1.5)
Mother's age
    ≤19 y3713.7 (±0.6)3343.2 (±0.6)
    20–29 y578946.8 (±1.4)561847.1 (±1.5)
    ≥30 y767149.6 (±1.4)792949.7 (±1.5)
Shot card used
    Yes654445.1 (±1.3)576939.5 (±1.5)
    No728754.9 (±1.3)811260.5 (±1.5)
Census region
    Northeast236017.2 (±0.7)229917.1 (±0.9)
    Midwest309921.3 (±0.8)314321.7 (±0.9)
    South514737.2 (±1.0)508736.3 (±1.1)
    West322524.3 (±0.9)335224.8 (±1.1)
MSA
    MSA, central city608435.2 (±1.2)612436.3 (±1.4)
    MSA, noncentral city489646.9 (±1.3)488745.4 (±1.5)
    Non-MSA285117.9 (±0.9)287018.3 (±1.0)
No. of children <18 y old in household
    1384126.6 (±1.2)388426.1 (±1.3)
    2–3833459.3 (±1.4)832360.3 (±1.5)
    ≥4165614.2 (±1.1)167413.5 (±1.1)
Provider facility type
    All public196715.5 (±1.0)177615.8 (±1.2)
    All hospitals12598.7 (±0.8)12758.2 (±0.8)
    All private856961.3 (±1.3)861060.9 (±1.5)
    Other, mixed, unknown196614.6 (±1.0)214715.1 (±1.1)
Moved from a different stated
    Moved10708.4 (±0.8)9857.5 (±0.8)
    Did not move1272291.6 (±0.8)1287192.5 (±0.8)
4:3:1:3:3
    UTD1106078.5 (±1.2)1129679.8 (±1.2)
    Not UTD277121.5 (±1.2)258520.2 (±1.2)
  • a Influenza vaccination coverage measures for the 2002–2003 influenza season are based on data from the 2003 NIS and represent a subset of children included in the NIS. Only those who were between the ages of 6 and 23 months for the entire period of September 1, 2002, to December 31, 2002, are included in the influenza vaccination coverage measures.

  • b Influenza vaccination coverage measures for the 2003–2004 influenza season are based on data from the 2004 NIS and represent a subset of children included in the NIS. Only those who were between the ages of 6 and 23 months for the entire period of September 1, 2003, to December 31, 2003 are included in the influenza vaccination coverage measures.

  • c Defined using US Census Bureau poverty thresholds.

  • d Unknown responses were excluded (n = 39 for 2002–2003 and n = 25 for 2003–2004).