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Table 1 Outcomes observed, collective used, study population size (N), valid responses per outcome (valid N) and cumulative incidence proportions (%) for prediction modelling and sensitivity analysis

From: Comparison of three different methods for risk adjustment in neonatal medicine

Variable Collective 2006–2012 2013–2014
Training set Validation set
Na valid % N valid %
Mortality All Live-born 5212 5212 14.6 1572 1572 14.0
In hospital mortality Admitted to ward 4876 4874 8.8 1465 1465 7.7
Late onset sepsis 4874 9.5 1465 8.1
NECb 4874 2.4 1465 2.4
sIVHc 4865 6.5 1459 5.7
BPDd Discharged home alive 4449 4439 9.3 1352 1349 11.2
sROPe 3990 1.9 1200 1.6
  1. a N Sample size for analysis
  2. b NEC Necrotizing enterocolitis
  3. c sIVH intra−/periventricular haemorrhage grade 3–4
  4. d BPD bronchopulmonary dysplasia
  5. e sROP retinopathy of prematurity grade 3 and above