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Table 3 Final seven variable model number needed to treat analyses*

From: A predictive model for respiratory syncytial virus (RSV) hospitalisation of premature infants born at 33–35 weeks of gestational age, based on data from the Spanish FLIP study

ROC AUC plus confidence limits True Positive Fraction True positives treated False Positive Fraction False positives treated NNT NNT
(80% efficacy)
0.791
(mid point)
0.75 75 0.33 627 9.4 11.7
0.751
(lower limit)
0.75 75 0.39 741 10.9 13.6
0.830
(upper limit)
0.75 75 0.26 494 7.6 9.5
  1. *Number needed to treat (NNT) to prevent hospitalisation of 75% of at risk infants, assuming a 5% hospitalisation rate and 80% treatment efficacy (n = 2,000)