Calibration of the HOMR score in the derivation and validation cohorts
| Calibration measure | Cohort | |||
|---|---|---|---|---|
| Derivation n = 87* | Ontario n = 84* | Alberta n = 77* | Boston n = 65* | |
| % of HOMR scores for which 95% CI of observed risk of death included expected risk of death | 66.7 | 31.0 | 57.1 | 53.8 |
| Difference between observed and expected % of patients dead at 1 yr | ||||
| Relative,† % | ||||
| Median (IQR) | 0.05 (0.02 to 0.25) | 0.17 (0.06 to 0.26) | 0.09 (0.03 to 0.54) | 0.26 (0.06 to 1) |
| Range | 0–2.02 | 0–226.86 | 0–1.14 | 0–5.27 |
| Absolute,‡ % | ||||
| Median (IQR) | 0.2 (0.02 to 0.72) | 0.33 (0.09 to 2.78) | 0.34 (0.03 to 1.95) | 0.34 (0.05 to 1.76) |
| Range | 0–4.46 | 0–8.72 | 0–11.1 | 0–39.35 |
Note: Boston = Brigham and Women’s Hospital, CI = confidence interval, HOMR = Hospital-patient One-year Mortality Risk, IQR = interquartile range.
↵* n refers to the number of discrete values of the HOMR score represented by at least 1 patient within the cohort.
↵† Relative difference was calculated as the absolute difference divided by the expected % dead at 1 yr.
↵‡ Absolute difference was calculated as observed % dead at 1 yr minus expected % dead at 1 yr.