TABLE 4

Microbiologic Characteristics During the First Year After ESCF Enrollment According to Site Outcomes Quartile

CharacteristicaOutcomes QuartileP
UQ (N = 755)LQ (N = 743)
Patients cultured, n (%)714 (94.6)620 (83.4)<.0001
No. of cultures per patient, mean ± SD3.4 ± 2.502.0 ± 1.18<.0001
No. of P aeruginosa–positive cultures per patient, mean ± SD0.5 ± 1.020.5 ± 0.80.888
Patients with ≥1 positive culture, n (%)
    P aeruginosa218 (30.5)238 (38.4).003
    S aureus374 (52.4)249 (40.2)<.0001
    H influenzae211 (29.6)178 (28.7).736
    B cepacia3 (0.4)4 (0.6).711
    S maltophilia57 (8.0)40 (6.5).283
    Other Gram-negative bacillib264 (37.0)195 (31.5).034
  • Site outcomes quartiles were determined on the basis of ranking the sites according to their median FEV1 % predicted in 2003 among 6- to 12-year-old patients who were enrolled in ESCF.

  • a Unless otherwise defined.

  • b Gram-negative bacilli other than P aeruginosa, B cepacia, and S maltophilia.