TABLE 1.

Characteristics of Massachusetts Children Who Provided Nasopharyngeal Specimens in 2001 and 2004

2001, N (%)2004, N (%)
AgeN = 742N = 994
    0–<6 mo123 (17)55 (6)*
    6–<12 mo112 (15)120 (12)
    12–<24 mo144 (19)229 (23)
    24–<36 mo104 (14)143 (14)
    >36 mo259 (35)447 (45)*
GenderN = 741N = 994
    Female340 (46)524 (53)
RaceN = 707N = 948
    White548 (78)800 (84)
    Black50 (7)35 (4)
    Hispanic53 (8)51 (5)
    Asian20 (3)21 (2)
    Other36 (5)41 (4)
  • * Significant difference between 2001 and 2004, P < .0001.