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Table 2.

Outcomes for each prioritized question

Critical outcomes for decision-making
Q1. • Time to transfusion (delay to treatment)
• Time to antibody identification
• Alloimmunization
• HTR
• Mortality
• Morbidity
Q2. • HTR
• Alloimmunization rate
• Alloimmunization prevalence
• Morbidity
• Mortality
Q3. • Alloimmunization
• HTR
• ICU admission
• Mortality
• Infection
• Pain
• Adverse effects (aseptic meningitis, avascular necrosis [AVN])
Q4. • Length of stay
• Morbidity (stroke, renal function)
• Mortality
• Infection (meningococcemia, hepatitis B reactivation)
• Pain
• Adverse effects (aseptic meningitis, AVN)
Q5. • Alloimmunization
• RBC unit use
• Frequency of visits
• Iron overload
• HbS suppression
• Recurrence or progression of primary indication for chronic transfusion (stroke, acute chest syndrome, pain)
• Adverse reactions (fever, allergic, procedural such as nausea, citrate toxicity, hypotension, presyncope)
• Line-related complications
• Duration of procedure
Q6. • Length of hospital stay
• Length of ICU stay
• Ventilator support (days)
• Morbidity (during hospital stay)
• Mortality
• HbS level
• Alloimmunization
• Adverse reactions (fever, allergic, fluid overload, procedural such as nausea, citrate toxicity, thrombocytopenia)
• Line-related complication
Q7. • RBC unit use
• Frequency of procedures
• Iron overload
• HbS suppression
• Recurrence or progression of primary indication for chronic transfusion (stroke, acute chest syndrome, pain)
• Alloimmunization
• Adverse reactions
• Duration of procedure
Q8. • Alloimmunization
• Maternal mortality
• Vaso-occlusive pain episodes
• Pulmonary complications
• Pulmonary embolism
• Pyelonephritis
• Perinatal mortality
• Small size for gestational age/low birth weight
• Neonatal death
• Preterm birth
Q9. • Postoperative acute chest syndrome
• Postoperative pain crisis
• All other postoperative complications (infection, thrombosis)
• Mortality
• Alloimmunization
• Adverse reactions (allergic, fever)
• Length of stay
Q10. • Iron-induced liver disease/failure
• Iron-induced cardiac disease
• Iron-induced endocrinopathies (growth failure, delayed puberty, hypothyroidism, diabetes)
• Mortality