The main health metric, A1c, is an excellent summary statistic for personal and population monitoring of diabetes including in self-reported form [15], [16].
When combined with other clinical data (laboratory, principal diagnosis, age, and admission source) the discrimination of the Elixhauser index was excellent (c-statistic = 0.874); however, some of the data used are not readily available in other settings – particularly laboratory, which accounted for 67.7% of the model's unique attributable chi square.
The mortality models exhibited excellent discrimination (C statistic = 0.93) and acceptable calibration (HL statistic 63), given the large size of the data set and the HL statistic's well known sensitivity to sample size [ 35].
Agency for Health Care Policy and Research guideline criteria had excellent discrimination (C statistic of 0.807) compared with the sole criterion of stress urinary incontinence only (C statistic of 0.574), with a positive predictive value of 85.7%.
This model had excellent discrimination (C statistic = 0.91) but poor calibration (Hosmer-Lemeshow χ2 = 119; P < 0.001).
30 Overall, there was good overlap in the propensity score distributions between the exposure groups, and the hdPS model had excellent discrimination (C statistic 0.89).
We wish to thank Magnus Backheden, Department of Learning, Informatics, Management and Ethics (LIME) for excellent support with statistic and data analysing, Margareta Berglund RN, Department of Cardiology and Karolinska University Hospital Huddinge, Karolinska Institute, Stockholm, Sweden for excellent support with recruitment of patients an data collection.
The model had excellent discrimination (c-statistic = 0.88) and calibration (p-value of Hosmer Lemeshow statistic for the entire cohort was 0.66) for all-cause death in hospital.
Both models showed excellent discrimination (c-statistic = 0.95 and 0.98, respectively), low rates of cross-validated misclassification (9.2% and 5.3%), and good performance on the external test dataset (c-statistic = 0.95 and 0.94).
By convention, a Kappa statistics that is.70 or higher is excellent whereas a Kappa statistic that is less than.4 is considered unacceptable and levels in between are acceptable.
