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What do systematic reviews say?

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Evidence found and GRADE certainty

279 questions · 289 findings · 28 reviews · Headline outcomes only

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No studies found 81 · 28%GRADE not reported 9 · 3.1%Very low 90 · 31.1%Low 67 · 23.2%Moderate 24 · 8.3%High 18 · 6.2%

Late paracetamol vs placebo or no intervention

Necrotizing enterocolitis during initial hospital stay (by radiological diagnosis) · preterm or low birth weight infants with PDA

Late paracetamol showed no clear difference in necrotizing enterocolitis during initial hospital stay (by… compared with placebo/no intervention (low certainty).

1 finding from 1 review

Early paracetamol vs placebo or no intervention

Failure of PDA closure after first course of treatment (assessed by post‐treatment ECHO) · preterm or low birth weight infants with PDA

Early paracetamol may leads to lower failure of PDA closure after first course of treatment (by… compared with placebo/no intervention (low certainty).

1 finding from 1 review

Paracetamol 500 mg to 650 mg vs placebo

Pain‐free at 1 hour · adults with episodic tension‐type headache

The review found no eligible studies for this question.

2 findings from 1 review

Paracetamol plus ibuprofen (oral or IV) vs ibuprofen plus placebo (oral or IV) or no intervention

Failure of PDA closure after first course of treatment (assessed by post‐treatment ECHO) · preterm or low birth weight infants with PDA

Paracetamol plus ibuprofen (oral or IV) showed no clear difference in failure of PDA closure after first course of treatment (assessed by… compared with ibuprofen plus placebo (oral or IV) or no intervention (low certainty).

1 finding from 1 review

Paracetamol plus ibuprofen (oral or IV) vs ibuprofen plus placebo (oral or IV) or no intervention

Necrotizing enterocolitis during initial hospital stay (by radiological diagnosis) · preterm or low birth weight infants with PDA

Paracetamol plus ibuprofen (oral or IV) showed no clear difference in necrotizing enterocolitis during initial hospital stay (radiological… compared with ibuprofen plus placebo (oral or IV) or no intervention (low certainty).

1 finding from 1 review