Age categoriesb | Sensitivity | Specificity | PPV | NPV | | | AUROC | Number of individuals classified |
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| (%) | (%) | (%) | (%) | LR+ | LR- |
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TP | FP | FN | TN |
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≥ 70 years | 91.0 | 96.0 | 87.7 | 97.1 | 22.7 | 0.1 | 93.8 | 242 | 34 | 24 | 816 |
≥ 75 years | 89.7 | 97.8 | 93.4 | 96.5 | 41.0 | 0.1 | 93.7 | 253 | 18 | 29 | 805 |
≥ 80 years | 91.2 | 96.5 | 89.6 | 97.0 | 25.7 | 0.1 | 93.2 | 206 | 24 | 20 | 652 |
≥ 85 years | 90.0 | 96.8 | 90.0 | 96.8 | 27.8 | 0.1 | 95.5 | 135 | 15 | 15 | 448 |
- PPV Positive predictive value, NPV Negative predictive value, LR+ Likelihood ratio of positive test, LR- Likelihood ratio of negative test, AUROC Area under receiver operating characteristic curve, TP True positive, FP False positive, TN True negative, FN False negative
- aDefined as being in the highest tertile of length of hospital stay (i.e., > 13 days)
- bonly combinations involving at least 10 participants were considered