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. 2018 Mar 6;10:235–251. doi: 10.2147/CLEP.S146729

Table 2.

Distribution of the subjects depending on the estimated risk of 1-year mortality

Derivation sample (981) Validation sample (964)
Risk group No (931) Yes (50) No (893) Yes (71)

Unclassified 60 (92.3) 5 (7.7) 51 (85.0) 9 (15.0)

Low 634 (99.4) 4 (0.6) 594 (98.3) 10 (1.7)

Medium 115 (95.0) 6 (5.0) 130 (95.6) 6 (4.4)
High 71 (85.5) 12 (14.5) 66 (79.5) 17 (20.5)
Very high 51 (68.9) 23 (31.2) 52 (64.2) 29 (35.8)

AUC 0.875 (0.823–0.926) 0.832 (0.777–0.888)

Notes: Estimated mortality rate (P) was categorized and classified as mortality risk as follows: low (P<0.03), medium (0.03≤P<0.1), high (0.1≤P<0.2) and very high (P≥0.2). Dashed horizontal line shows the cutoff point for dichotomization of estimated 1-year mortality risk looking for optimal sensitivity–specificity combination in the derivation sample, leading to a sensitivity of 0.889 and a specificity of 0.758.

Abbreviation: AUC, area under the receiver operating characteristic curve.