Table 2.
Subgroup analysis results for the PhysioNet 2012 Challenge mortality classification task.
|
|
#Samples | Masking (AUROCa), mean (SD) | Masking (Brier), mean (SD) | No masking (AUROC), mean (SD) | No masking (Brier), mean (SD) | ||||||
| Age strata (years) | |||||||||||
|
|
≤35 | 268 | 0.847 (0.74-0.93) | 0.057 (0.037-0.079) | 0.852 (0.75-0.94) | 0.059 (0.040-0.079) | |||||
|
|
35-45 | 309 | 0.906 (0.84-0.96) | 0.048 (0.031-0.066) | 0.880 (0.80-0.95) | 0.054 (0.037-0.072) | |||||
|
|
45-55 | 569 | 0.878 (0.82-0.93) | 0.064 (0.050-0.078) | 0.885 (0.83-0.93) | 0.064 (0.052-0.077) | |||||
|
|
55-65 | 708 | 0.859 (0.82-0.90) | 0.074 (0.060-0.090) | 0.848 (0.80-0.89) | 0.076 (0.063-0.090) | |||||
|
|
65-75 | 845 | 0.830 (0.79-0.87) | 0.094 (0.079-0.109) | 0.822 (0.78-0.86) | 0.094 (0.080-0.108) | |||||
|
|
>75 | 1294 | 0.801 (0.77-0.83) | 0.135 (0.121-0.149) | 0.786 (0.75-0.82) | 0.135 (0.123-0.149) | |||||
| ICUb types | |||||||||||
|
|
Coronary care unit | 587 | 0.806 (0.75-0.86) | 0.087 (0.069-0.106) | 0.807 (0.74-0.86) | 0.086 (0.070-0.104) | |||||
|
|
Cardiac surgery unit | 780 | 0.862 (0.79-0.92) | 0.035 (0.025-0.046) | 0.845 (0.76-0.92) | 0.037 (0.028-0.048) | |||||
|
|
Surgical ICU | 1192 | 0.852 (0.82-0.88) | 0.094 (0.082-0.107) | 0.843 (0.81-0.87) | 0.095 (0.083-0.106) | |||||
|
|
Medical ICU | 1434 | 0.801 (0.77-0.83) | 0.128 (0.115-0.140) | 0.787 (0.76-0.82) | 0.129 (0.117-0.141) | |||||
aAUROC: area under the curve of the receiver operating characteristic.
bICU: intensive care unit.