Table 5

Logistic Regression of Gestational Age and Inhaled Cortisone Use

Model 1, OR (95% CI)Model 2, OR (95% CI)Model 3, OR (95% CI)Model 4, OR (95% CI)
Gestational age, wk
    23–282.23 (1.93–2.58)2.28 (1.96–2.64)2.05 (1.75–2.40)2.02 (1.73–2.37)
    29–321.67 (1.53–1.82)1.66 (1.53–1.81)1.58 (1.44–1.73)1.57 (1.43–1.72)
    33–341.40 (1.30–1.50)1.39 (1.29–1.50)1.36 (1.26–1.47)1.35 (1.25–1.46)
    35–361.26 (1.21–1.32)1.25 (1.20–1.31)1.25 (1.19–1.30)1.24 (1.19–1.30)
    37–381.11 (1.08–1.14)1.10 (1.08–1.13)1.08 (1.06–1.11)1.08 (1.06–1.11)
    39–411111
    ≥420.98 (0.94–1.02)0.98 (0.94–1.02)0.97 (0.93–1.01)0.97 (0.93–1.01)
  • Model 1 is adjusted for age and gender.

  • Model 2 is adjusted for age, gender, county of residence, maternal education, social assistance, maternal and paternal asthma medication, and maternal smoking during pregnancy.

  • Model 3 is adjusted for age, gender, county of residence, maternal education, social assistance, maternal and paternal asthma medication, maternal smoking during pregnancy, SGA, chorioamnionitis, multiple birth, asphyxia, and cesarean delivery.

  • Model 4 is adjusted for age, gender, county of residence, maternal education, social assistance, maternal and paternal asthma medication, maternal smoking during pregnancy, SGA, chorioamnionitis, multiple birth, asphyxia, cesarean delivery, and hospital admission because of RSV infection.