TABLE 2

Characteristics of Children Hospitalized With CA LCI: Philadelphia, 2000–2004

n (%)
All (n = 745)Healthy Children (n = 382)aNeighborhood Cohort (n = 231)b
Gender
    Female309 (41)168 (44)91 (39)
    Male436 (59)214 (56)140 (61)
Age group
    0–5 mo188 (25)168 (44)67 (29)
    6–23 mo250 (34)130 (34)79 (34)
    2–4 y135 (18)53 (14)37 (16)
    5–11 y92 (12)19 (5)27 (12)
    12–17 y53 (7)9 (2)21 (9)
    18–21 y27 (4)3 (1)NA
Race
    White249 (34)139 (37)11 (5)
    Black408 (55)189 (50)207 (90)
    Asian18 (2)14 (4)4 (2)
    Other64 (9)40 (10)7 (3)
Viral type
    Influenza A591 (79)312 (82)189 (82)
    Influenza B154 (21)70 (18)42 (18)
Season
    2000–2001107 (14)48 (13)29 (13)
    2001–2002252 (34)134 (35)83 (36)
    2002–2003135 (18)71 (19)42 (18)
    2003–2004251 (34)129 (34)77 (33)
ACIP high-risk medical conditionsc
    Nonea382 (51)123 (53)
    Asthma181 (24)71 (31)
    Other chronic pulmonary disease27 (4)9 (4)
    Cardiac disease52 (7)11 (5)
    Immunosuppressiond59 (8)7 (3)
    Hemoglobinopathy41 (6)11 (5)
    Long-term salicylate therapy14 (2)3 (1)
    Chronic renal dysfunction10 (1)2 (1)
    Metabolic disease20 (3)0
    Pregnancy00
    NNMD (including seizures)89 (12)19 (8)
Any ACIP high-risk condition363 (49)108 (47)
>2 ACIP high-risk conditions106 (14)21 (10)
  • NA indicates not applicable. Some of the data included were previously published (used with permission from Keren R, Zaoutis T, Bridges C, et al. JAMA. 2005;294:2188–2194).

  • a Children who lack any chronic medical conditions recognized by the ACIP as increasing the risk of influenza-related complications.

  • b Neighborhood cohort was defined by home residence within 9 contiguous zip-code areas with >70% acute asthma exacerbations admitted to the study hospital (CHOP) and <18 years of age.

  • c Chronic medical conditions recognized by the ACIP as increasing the risk of influenza-related complications.

  • d Immunosuppressive disorders included human immunodeficiency virus infection and malignancies.