TABLE 3

Multivariable Logistic-Regression Analyses of Influenza Vaccination Coverage Levels Among Children Aged 6 to 23 Months and Demographic Characteristics

Demographic Characteristic2002–2003 Influenza Seasona2003–2004 Influenza Seasonb
1+FLU, Adjusted OR (95% CI)cFully Vaccinated, Adjusted OR (95% CI)d1+FLU, Adjusted OR (95% CI)eFully Vaccinated, Adjusted OR (95% CI)f
Child's race/ethnicity
    Hispanic1.4 (0.9–2.2)1.2 (0.7–2.2)1.3 (0.9–1.9)1.1 (0.6–2.0)
    White, non-Hispanic1.5 (1.0–2.2)g1.5 (1.0–2.5)1.7 (1.2–2.4)h1.8 (1.0–3.0)g
    Black, non-HispanicReferentReferentReferentReferent
    Asian, non-Hispanic2.1 (1.1–3.8)g2.2 (1.1–4.7)g2.0 (1.2–3.3)h1.6 (0.7–3.5)
    American Indian/Alaska Native and other, non-Hispanic0.9 (0.4–2.1)1.0 (0.3–3.2)2.8 (1.5–5.1)h1.8 (0.8–4.1)
First born
    No0.8 (0.6–1.1)0.6 (0.4–0.9)g0.9 (0.7–1.2)0.9 (0.6–1.3)
    YesReferent1.0 ReferentReferentReferent
Gender
    Male1.0 (0.8–1.2)1.0 (0.8–1.3)1.1 (0.9–1.2)1.1 (0.9–1.3)
    FemaleReferentReferentReferentReferent
Poverty statusi
    Above, more than $75 000/y2.1 (1.3–3.4)h1.6 (0.8–3.1)1.4 (1.1–1.9)g1.4 (0.9–2.2)
    Above, $75 000/y or less1.2 (0.8–1.9)0.8 (0.5–1.5)1.0 (0.8–1.3)1.1 (0.7–1.6)
    BelowReferentReferentReferentReferent
    Unknown1.1 (0.7–1.8).0 (0.5–2.0)1.0 (0.7–1.5)1.3 (0.8–2.2)
Child's age at start of the influenza season
    6–11 mo1.5 (1.1–2.0)h1.4 (1.0–2.0)g1.7 (1.3–2.1)h1.3 (1.0–1.7)
    12–16 mo1.4 (1.1–1.8)h1.3 (1.0–1.8)1.4 (1.1–1.7)h1.1 (0.9–1.4)
    17–20 moReferentReferentReferentReferent
Mother's education level
    <12 yReferentReferentReferentReferent
    12 y1.0 (0.7–1.5)1.4 (0.8–2.5)1.3 (0.9–1.7)1.4 (0.8–2.3)
    >12 y, non–college graduate1.3 (0.8–2.0)1.7 (0.9–3.2)1.1 (0.8–1.5)1.2 (0.7–2.1)
    College graduate1.4 (0.9–2.1)2.1 (1.2–3.7)g1.5 (1.1–2.1)h1.7 (1.0–3.0)g
Mother's marital status
    Widowed/divorced/separatedReferentReferentReferentReferent
    Never married1.5 (1.0–2.4)1.5 (0.8–2.9)1.4 (0.9–2.0)1.5 (0.9–2.7)
    Married1.3 (0.8–1.9)1.7 (0.9–3.2)1.4 (1.0–2.0)2.0 (1.1–3.5)g
Mother's age
    ≤19 yReferentReferentReferentReferent
    20–29 y0.8 (0.4–1.8)1.7 (0.6–4.8)0.8 (0.5–1.5)1.3 (0.6–3.0)
    ≥30 y0.8 (0.4–1.9)1.8 (0.6–5.2)1.0 (0.5–1.8)1.6 (0.7–3.9)
Shot card used
    Yes1.0 (0.8–1.2)1.0 (0.8–1.3)1.0 (0.9–1.2)1.1 (0.9–1.4)
    NoReferentReferentReferentReferent
Census region
    Northeast1.1 (0.8–1.4)1.2 (0.8–1.7)1.0 (0.8–1.3)1.1 (0.8–1.4)
    Midwest1.5 (1.1–1.9)h1.5 (1.1–2.0)h1.0 (0.8–1.2)1.2 (1.0–1.6)
    SouthReferentReferentReferentReferent
    West1.1 (0.9–1.5)1.4 (1.0–1.9)0.9 (0.7–1.2)1.1 (0.8–1.5)
MSA
    MSA, central city1.3 (0.9–1.7)1.5 (1.0–2.1)g1.3 (1.0–1.6)g1.2 (0.9–1.7)
    MSA, noncentral city1.1 (0.8–1.5)1.3 (0.9–1.9)1.4 (1.2–1.8)h1.4 (1.0–1.9)g
    Non-MSAReferentReferentReferentReferent
No. of children <18 y old in household
    11.7 (1.0–2.8)g1.6 (0.8–3.2)1.3 (0.9–2.0)1.5 (0.9–2.6)
    2–31.6 (1.0–2.4)g1.8 (0.9–3.3)1.2 (0.9–1.6)1.2 (0.8–1.8)
    ≥4ReferentReferentReferentReferent
Provider facility type
    All publicReferentReferentReferentReferent
    All hospitals1.9 (1.1–3.2)g1.4 (0.7–2.8)1.7 (1.2–2.5)h1.3 (0.8–2.2)
    All private2.1 (1.4–3.2)h1.9 (1.0–3.4)g1.5 (1.1–2.1)h1.6 (1.0–2.4)g
    Other, mixed, unknown1.8 (1.1–2.9)g1.6 (0.9–3.1)1.2 (0.8–1.6)1.4 (0.8–2.3)
Moved from a different state
    MovedReferentReferentReferentReferent
    Did not move1.5 (1.0–2.3)g1.7 (1.1–2.8)g1.3 (0.9–1.8)1.5 (0.9–2.5)
  • 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 (n = 13831 [unweighted]).

  • 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 (n = 13881 [unweighted]).

  • c Receipt of ≥1 influenza vaccination between September 1, 2002, and December 31, 2002.

  • d Children were considered fully vaccinated if they had (1) received no doses of influenza vaccine before September 1, 2002, but then received 2 doses between September 1, 2002, and either the date of interview or January 31, 2003, or (2) received at least 1 dose of influenza vaccine before September 1, 2002, and then received at least 1 between September 1, 2002, and December 31, 2002.

  • e Receipt of ≥1 influenza vaccination between September 1, 2003, and December 31, 2003.

  • f Children were considered fully vaccinated if they had (1) received no doses of influenza vaccine before September 1, 2003, but then received 2 doses between September 1, 2003, and either the date of interview or January 31, 2004, or (2) received at least 1 dose of influenza vaccine before September 1, 2003, and then received at least 1 between September 1, 2003, and December 31, 2003.

  • g P < .05 for comparison with the referent group.

  • h P < .01 for comparison with the referent group.

  • i Defined using US Census Bureau poverty thresholds.