Table 3.

Analysis of the receiver operating characteristic curve values of scoring systems in predicting 28-day mortality in critically ill patients

Scoring system	AUC	P value	95%CI	Cut-off value	Sensitivity (%)	Specificity (%)	YI	PV+ (%)	PV- (%)
GIDS1	0.785	< 0.001	0.720-0.851	1.5	87.06	67.74	0.548	71.15	85.14
AGI1	0.779	< 0.001	0.713-0.845	2.5	69.41	84.95	0.544	80.82	75.24
SOFA1	0.859	< 0.001	0.805-0.913	9.5	87.06	67.74	0.548	71.15	85.14
APACHE II1	0.812	< 0.001	0.749-0.875	21.5	81.18	70.97	0.521	71.88	80.49
SOFA + GIDS2	0.874	< 0.001	0.822-0.927	11.5	88.24	74.19	0.624	75.76	87.34
SOFA + AGI2	0.869	< 0.001	0.816-0.921	12.5	85.88	75.27	0.612	76.04	85.37
APACHE II + GIDS2	0.833	< 0.001	0.774-0.892	23.5	81.18	74.19	0.554	74.19	81.18
APACHE II + AGI2	0.831	< 0.001	0.771-0.890	23.5	84.71	69.89	0.546	72.00	83.33

¹Maximum values during the first week of intensive care unit (ICU) admission.

²Maximum combination values during the first week of ICU admission.

AUC: Area under the receiver operating characteristic curve; YI: Youden index; PV+: Positive predictive value; PV-: Negative predictive value; SOFA: Sequential organ failure assessment; APACHE II: Acute Physiology and Chronic Health Evaluation II; AGI: Acute gastrointestinal injury; GIDS: Gastrointestinal dysfunction score.