Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

2,353 questions in 210 reviews · Neonatal

current versions
No studies 432 · 18.4%Ungraded 99 · 4.2%Very low 609 · 25.9%Low 737 · 31.3%Moderate 385 · 16.4%High 91 · 3.9%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Inhaled corticosteroids vs no treatment or placebo
Duration of hospital stay (days) · infants with transient tachypnoea of the newborn
Postnatal corticosteroids for transient tachypnoea of the newborn (2020) · Cochrane
no estimate extracted1 study · 49 participantsVery low
Inhaled corticosteroids vs no treatment or placebo
Duration of tachypnoea · infants with transient tachypnoea of the newborn
Postnatal corticosteroids for transient tachypnoea of the newborn (2020) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Inhaled corticosteroids vs no treatment or placebo
Persistent pulmonary hypertension · infants with transient tachypnoea of the newborn
Postnatal corticosteroids for transient tachypnoea of the newborn (2020) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Inhaled corticosteroids vs no treatment or placebo
Hyperglycaemia · infants with transient tachypnoea of the newborn
Postnatal corticosteroids for transient tachypnoea of the newborn (2020) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Inhaled corticosteroids vs no treatment or placebo
Gastrointestinal bleed · infants with transient tachypnoea of the newborn
Postnatal corticosteroids for transient tachypnoea of the newborn (2020) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Non‐invasive respiratory support vs supplemental oxygen or no treatment
Need for mechanical ventilation · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
RR 0.3 [0.01, 6.99]1 study · 64 participantsVery low
CPAP vs nasal ventilation (NIPPV or NHFV)
Duration of tachypnea, defined as hours with respiratory rate greater than 60 breaths per minute ‒NHFV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 40 participantsVery low
CPAP vs nasal ventilation (NIPPV or NHFV)
Duration of hospital stay ‒NIPPV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 40 participantsVery low
Non‐invasive respiratory support vs supplemental oxygen or no treatment
All‐cause mortality · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
RR 0.3 [0.01, 6.99]1 study · 64 participantsVery low
Non‐invasive respiratory support vs supplemental oxygen or no treatment
Duration of hospital stay · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 64 participantsVery low
Non‐invasive respiratory support vs supplemental oxygen or no treatment
Duration of tachypnea, defined as hours with respiratory rate greater than 60 breaths per minute · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 64 participantsVery low
CPAP vs nasal ventilation (NIPPV or NHFV)
Need for mechanical ventilation ‒NIPPV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
RR 4 [0.49, 32.72]1 study · 40 participantsVery low
CPAP vs nasal ventilation (NIPPV or NHFV)
Need for mechanical ventilation ‒NHFV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 40 participantsUngraded
CPAP vs nasal ventilation (NIPPV or NHFV)
Pneumothorax ‒NIPPV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
RR 1 [0.07, 14.9]1 study · 40 participantsVery low
CPAP vs nasal ventilation (NIPPV or NHFV)
Pneumothorax ‒NHFV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 40 participantsUngraded
CPAP vs nasal ventilation (NIPPV or NHFV)
Duration of tachypnea, defined as hours with respiratory rate greater than 60 breaths per minute ‒NIPPV versus CPAP · patients with the management of transient tachypnea of the newborn
Non‐invasive respiratory support for the management of transient tachypnea of the newborn (2020) · Cochrane
no estimate extracted1 study · 40 participantsVery low
Early treatment vs expectant management
All‐cause mortality during hospital stay · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.8 [0.46, 1.39]6 studies · 500 participantsModerate
Very early treatment vs expectant management
Chronic lung disease · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.83 [0.63, 1.08]7 studies · 384 participantsLow
Very early treatment vs expectant management
Severe Intraventricular hemorrhage (grades III and IV) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.64 [0.21, 1.93]4 studies · 240 participantsModerate
Very early treatment vs expectant management
Necrotizing enterocolitis (NEC; stage 2 or greater) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 1.08 [0.53, 2.21]5 studies · 332 participantsModerate
Very early treatment vs expectant management
Duration of hospitalization · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
no estimate extracted4 studies · 240 participantsLow
Very early treatment vs expectant management
Neurodevelopmental outcomes (moderate/severe cognitive delay at 18 to 24 months) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.27 [0.03, 2.31]1 study · 79 participantsLow
Very early treatment vs expectant management
Neurodevelopmental outcomes (moderate/severe motor delay at 18 to 24 months) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.54 [0.05, 5.71]1 study · 79 participantsLow
Very early treatment vs expectant management
Neurodevelopmental outcomes (moderate/severe language delay at 18 to 24 months) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.54 [0.1, 2.78]1 study · 79 participantsLow
Early treatment vs expectant management
Proportion of infants requiring surgical PDA ligation or transcatheter occlusion · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 1.08 [0.65, 1.8]4 studies · 432 participantsVery low
Early treatment vs expectant management
Proportion of infants receiving any pharmacotherapy for a hemodynamically significant PDA · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 2.3 [1.86, 2.83]2 studies · 232 participantsLow
Early treatment vs expectant management
Chronic lung disease · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.9 [0.62, 1.29]4 studies · 339 participantsModerate
Early treatment vs expectant management
Severe Intraventricular hemorrhage (grades III and IV) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.83 [0.32, 2.16]2 studies · 171 participantsLow
Early treatment vs expectant management
Necrotizing enterocolitis (NEC; stage 2 or greater) · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 2.34 [0.86, 6.41]5 studies · 473 participantsLow
Very early treatment vs expectant management
All‐cause mortality during hospital stay · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.94 [0.58, 1.53]7 studies · 384 participantsModerate
Very early treatment vs expectant management
Proportion of infants requiring surgical PDA ligation or transcatheter occlusion · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 0.88 [0.36, 2.17]5 studies · 293 participantsModerate
Very early treatment vs expectant management
Proportion of infants receiving any pharmacotherapy for a hemodynamically significant PDA · preterm infants
Early treatment versus expectant management of hemodynamically significant patent ductus arteriosus for… (2020) · Cochrane
RR 1.64 [1.31, 2.05]4 studies · 156 participantsVery low
Early vs late fortification of human milk
Time to regain birth weight (days) · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
no estimate extracted2 studies · 237 participantsLow
Early vs late fortification of human milk
Linear growth (cm/week) · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
no estimate extracted2 studies · 237 participantsLow
Early vs late fortification of human milk
Increase in head circumference (cm/week) · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
no estimate extracted2 studies · 237 participantsLow
Early vs late fortification of human milk
Necrotising enterocolitis stage 2 or 3 · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
RR 1.36 [0.44, 4.16]2 studies · 237 participantsLow
Early vs late fortification of human milk
Time to reach full enteral feeds · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
no estimate extracted2 studies · 237 participantsLow
Early vs late fortification of human milk
Extrauterine growth restriction at discharge · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
RR 1.06 [0.81, 1.39]2 studies · 237 participantsLow
Early vs late fortification of human milk
Proportion of infants with feed interruption episodes · preterm infants
Early fortification of human milk versus late fortification to promote growth in preterm infants (2020) · Cochrane
RR 0.99 [0.73, 1.34]2 studies · 237 participantsLow
Targeted or adjustable individualized fortification vs standard non‐individualized fortification
Growth velocity, weight, g/kg/d, end of intervention · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extracted6 studies · 345 participantsModerate
Targeted individualized vs standard non‐individualized fortification
Growth velocity, weight, g/kg/d, end of intervention · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extracted4 studies · 269 participantsModerate
Targeted individualized vs standard non‐individualized fortification
Growth velocity, length, mm/d, end of intervention · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extracted3 studies · 166 participantsLow
Targeted individualized vs standard non‐individualized fortification
Growth velocity, head circumference, mm/d, end of intervention · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extracted3 studies · 166 participantsLow
Targeted individualized vs standard non‐individualized fortification
Length of hospital stay, days · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extracted1 study · 75 participantsVery low
Targeted individualized vs standard non‐individualized fortification
Retinopathy of prematurity · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extractedNRNo studies
Targeted individualized vs standard non‐individualized fortification
Bronchopulmonary dysplasia · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extractedNRNo studies
Targeted individualized vs standard non‐individualized fortification
Mortality · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
no estimate extractedNRNo studies
Targeted individualized vs standard non‐individualized fortification
In‐hospital mortality · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
RR 0.14 [0.02, 1.14]3 studies · 334 participantsVery low
Targeted individualized vs standard non‐individualized fortification
Necrotizing enterocolitis · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
RR 0.4 [0.08, 1.99]2 studies · 257 participantsVery low
Targeted individualized vs standard non‐individualized fortification
Culture‐proven late‐onset bacterial sepsis · promoting growth and development in very low birth weight infants receiving human milk
Individualized versus standard diet fortification for growth and development in preterm infants receiving… (2020) · Cochrane
RR 1.29 [0.76, 2.17]2 studies · 257 participantsVery low