Table 2. Comparison of the Updated and Original 5-Factor Models in the VON 2006-2012 Cohort.
| Variable | Gestational Age Only | Original Model | Updated Model | |
|---|---|---|---|---|
| Without Center Terms | With Center Terms | |||
| Mean absolute difference, %a | 8.5 | 5.5 | 3.5 | 1.6 |
| Range of observed minus expected outcomes, %a | −18.7 to 18.2 | −1.7 to 11.5 | −1.7 to 7.8 | −3.7 to 3.4 |
| C statistic (95% CI) | 0.679 (0.674 to 0.684) | 0.727 (0.722 to 0.732) | 0.728 (0.723 to 0.733) | 0.744 (0.739 to 0.749) |
Abbreviation: VON, Vermont Oxford Network.
a
The range of values for observed minus expected percent differences are for 24 subgroup combinations of the 5 risk factors.