TABLE 2

SMRs for Each Type of Outcome in Healthy Children

Category of EventsHealthy Children
ObservedExpectedSMRaCI 95%
Cardiovascular events20.72.8(0–6.7)
 Conduction disturbances00.20
 Bradycardia10.24.2(0–14)
 Hypotension10.44.7(0–7.9)
 Cardiac arrest00.30
Respiratory events5130.51.7(1.2–2.1)
 Acute bronchitis22.70.7(0–1.7)
 Chronic bronchitis00.030
 Bronchiolitis3823.91.6(1.1–2.1)
 Bronchospasm26.90.3(0–0.7)
 Others103.03.3(1.3–5.4)
Metabolic events30.65.1(0–10.9)
Death00.70
  • Only the first events are taken into account. —, not applicable.

  • a Indirect standardization on sex, age, and premature birth.