Regateiro, FSRezende, IPinto, NAbreu, CCarreiro-Martins, PGomes, ER2020-05-152020-05-152019Allergol Immunopathol (Madr). 2019;47(5):477---483http://hdl.handle.net/10400.17/3439Drug provocation tests (DPTs) are the gold-standard method to diagnose non-immediate hypersensitivity reactions (NIHSR) to beta-lactam antibiotics (BL) in children. Our aim was to compare the negative predictive value (NPV) of one-day (short) DPT versus 3-7 days (extended) DPT for the diagnosis of NIHSR to BL in paediatric age. A secondary aim was to compare confidence on drug re-exposure after short and extended negative DPTs.engAllergensAnti-Bacterial AgentsBronchial Provocation TestsChildChild, PreschoolDrug HypersensitivityDrug SubstitutionFemaleHumansHypersensitivity, DelayedMalePredictive Value of TestsPrognosisSkin Testsbeta-LactamsHDE ALERjournal article10.1016/j.aller.2019.01.004