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  1. Janice Higginson
  1. Correspondence to Dr Janice Higginson, ST5 Freeman Hospital, Newcastle-Upon-Tyne, Northumberland NE7 7DN, UK; janice.higginson{at}

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Updating the definition of bronchopulmonary dysplasia

This retrospective cohort study (JAMA Paeditr. Published Online First: 23 Jan 2017. included 80% of neonates born in Canada at less than 29 weeks gestation from January 2010 to September 2011. The aim was find out which of six definitions of bronchopulmonary dysplasia are most predictive of respiratory morbidity or neurosensory deficit, as measured at 18–21 months corrected age. The group then analysed at what gestational age application of the definition would be most accurate. They showed that the existing definition giving the best predictive value was the use of oxygen or respiratory support at 36 weeks gestational age, but that accuracy could be improved by applying this definition at 40 weeks. The application of a single definition that is appropriate to contemporary neonatal medicine will surely be beneficial to the specialty leading to improvements in patient care.

Distress causes cancer?

Batty et al (BMJ 2017;356:j108) used raw data from 16 studies contributing to Health Survey for England and Scottish Health Service from 1994 to 2008 to …

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