Data are expressed as the number (%) of affected individuals. The total number in each group was 84.
6-150 The number of ventilated days for which infants were paralysed is expressed as a percentage of the total number of ventilated days; data are given for day 1 only.
6-151 The numbers in square brackets indicate the number of infants in each group who received indomethacin.
HFO, high frequency oscillation; PDA, patent ductus arteriosus; ICH, intracranial haemorrhage; NEC, necrotising enterocolitis.