Fig. 3
From: A new weighted injury severity scoring system: better predictive power for adult trauma mortality
Comparison of goodness-of-fit between ISS and wISS in test sample, NTDB 2007–2014. Observed mortality and predicted by ISS and wISS are all grouped by individual ISS values. Overall, the predicted by wISS are closer to the observed comparing to ISS, especially in the range of critical injuries (ISS 25–74). Numerically, the Hosmer and Lemeshow Goodness-of-fit Chi-Square is 3441 for ISS and 432 for wISS (the overall difference between predicted and observed, smaller is better)